2022 CALGreen Guide Supplement 7-1-2024

SUPPLEMENT UPDATE GUIDE

To the 2022 California Green Building

Standards Code (CALGreen)-Nonresidential

Effective

July 1, 2024

Acknowledgements

Governor Gavin Newsom

Secretary of the Government Operations Agency, Amy Tong

Director of the Department of General Services, Ana Lasso

Members of the California Building Standards Commission

Chair, Secretary Amy Tong

Vice Chair, Rajesh Patel

Commissioners:

Kent Sasaki Erick Mikiten

Elley Klausbruckner Rajesh Patel

Peter Santillan Juvilyn Alegre

Aaron Stockwell Laura Rambin

Frank Ramirez James Haskin

Executive Director, Vacant

Acting Executive Director, Kevin Day

Project Lead: Enrique M. Rodriguez, Associate Construction Analyst

The California Building Standards Commission is a commission within

the Department of General Services

Visit our website at dgs.ca.gov/BSC

Please submit comments and suggestions for improvements or additions to this

publication to cbsc@dgs.ca.gov

or mail to

California Building Standards Commission

2525 Natomas Park Drive, Suite 130

Sacramento, CA 95833

Some of CBSC’s publications available on the website’s Resources page:

Guide to Title 24

It’s Your Building Department

Guide for Local Amendments of

Building Standards

Public Guide to the Building

Standards Adoption Process

Frequently Asked Questions

Glossary of Terms

Supplement Update

Guide to the 2022 California

Green Building Standards

Code – Nonresidential

Table of Contents

CHAPTER 2 DEFINITIONS ............................................................................................................................ 3

CHAPTER 5 NONRESIDENTIAL MANDATORY MEASURES .................................................................... 4

DIVISION 5.1- PLANNING AND DESIGN ..................................................................................................... 4

DIVISION 5.4 - MATERIAL CONSERVATION AND RESOURCE EFFICIENCY ........................................ 21

CHAPTER 6 REFERENCED ORGANIZATIONS AND STANDARDS ......................................................... 34

SECTION 601 GENERAL ......................................................................................................................... 34

CHAPTER 8 COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL .......................... 36

WORKSHEET (WS-3) 5.105.2 BUILDING REUSE ................................................................................. 37

WORKSHEET (WS-4) SECTION 5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT ................... 38

WORKSHEET (WS-5) SECTION 5.409.3 PRODUCT GWP COMPLIANCE - PRESCRIPTIVE PATH ...... 38

WORKSHEET (WS-6) [BSC-CG] SECTION A5.105.2 BUILDING REUSE TIER 1 AND TIER 2................. 39

WORKSHEET (WS-7) [BSC-CG] SECTION A5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT . 40

WORKSHEET (WS-8) [BSC-CG] SECTION A5.409.3 PRODUCT GWP COMPLIANCE-PRESCRIPTIVE

PATH ........................................................................................................................................................ 41

WORKSHEET (WS-9) SECTION 5.409.2 AND SECTION A5.409.2 WHOLE BUILDING LIFE CYCLE

ASSESSMENT ......................................................................................................................................... 42

APPENDIX A5 NONRESIDENTIAL VOLUNTARY MEASURES ................................................................ 43

DIVISION A5.1-PLANNING AND DESIGN .................................................................................................. 43

DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY ..................................... 55

Effective July 1, 2024

PURPOSE:

The purpose of this Supplement Update to the Guide to the 2022 California Green

Building Standards Code (CALGreen)-Nonresidential is to provide information about

regulatory changes that occurred during the 2022 Intervening Code Adoption Cycle

which were approved by the California Building Standards Commission (CBSC) August

2, 2023 (Rulemaking File #BSC 04/22). The regulations in the 2022 CALGreen Code

Supplement edition become effective July 1, 2024.

Updates to the Residential requirements or updates promulgated by the Division of the

State Architect (DSA) are not included in this guide.

This guide is nonregulatory and is not a substitute for using or studying the CALGreen

code itself; it is intended to be used in conjunction with the 2022 CALGreen code and

the 2022 CALGreen Code Supplements that should have been received and inserted

into your code binders. Electronic versions of CALGreen are automatically updated by

the publisher.

Note: An electronic version of the entire CALGreen Code including the 2022

CALGreen Code Supplement is available through the California Building

Standards Commission website: dgs.ca.gov/BSC/CALGreen, as well a link to the

Guide to the 2022 California Green Building Standards Code – Nonresidential.

LEGEND for the Supplement Update to the Guide to the 2022 California Green

Building Standards Code – Nonresidential

Amendments to the 2022 CALGreen regulatory language within this guide are

introduced with a note to the code user using bold, italicized text.

Note to code user: Bold, italicized text included within code section language

shown in

green text

indicates notes to the code user.

2022 CALGreen CODE page numbers in notes refer to the SUPPLEMENT page

numbers. 2022 GUIDE page numbers refer to those in the ORIGINALLY PUBLISHED

2022 GUIDE. Only modified and new code sections are explained in this 2022

CALGreen Supplement Guide; however, some related code sections are shown for

context. Note that explanations for new sections can only be found in this Supplement

Guide.

Supplements (blue pages) to the 2022 CALGreen have symbols used in the page

margins to indicate changes from the first printing:

|| This symbol in the margin of the 2022 edition of CALGreen indicates that a

change has been made.

> This symbol in the margin of the 2022 edition of CALGreen indicates

deletion of language.

The Supplement Guide explains the regulatory changes and provides examples in

sections printed in black font and titled: Change for 2022 Intervening Cycle

Supplement, INTENT, EXAMPLES, and others.

CHAPTER 2 DEFINITIONS

Chapter 2, Section 202 Definitions – Begins on page 2-1 of the 2022 CALGreen

code supplements (blue pages) (CALGreen) and on page 7 of the Guide to the

2022 California Green Building Standards Code – Nonresidential (2022 Guide).

…

New definitions added or amended to support the new Electric Vehicle (EV), Bird-

friendly Design and Embodied Carbon regulations are as follows:

2 X 2 RULE

ADHESIVE MARKER.

BUY CLEAN CALIFORNIA ACT.

CRADLE-TO-GATE.

CRADLE-TO-GRAVE.

ELECTRIC VEHICLE (EV) CHARGER.

BSC co-adopted existing HCD definition.

ELECTRIC VEHICLE CHARGING STATION (EVCS).

Amended and adopted by

BSC.

ELECTRIC VEHICLE SUPPLY EQUIPMENT (EVSE).

Amended.

FILM.

GLASS, ACID ETCHED.

GLASS, FRITTED.

GLASS SURFACE.

LEVEL 2 ELECTRIC VEHICLE (EV) CHARGER.

LEVEL 2 ELECTRIC VEHICLE SUPPLY EQUIPMENT.

BSC co-adopted existing

HCD definition.

LOW POWER LEVEL 2 ELECTRIC VEHICLE (EV) CHARGING RECEPTACLE.

Amended and adopted by BSC.

MATURE TREE CANOPY.

REFERENCE STUDY PERIOD.

TYPE III ENVIRONMENTAL PRODUCT DECLARATION (EPD).

FACTORY-SPECIFIC EPD.

PRODUCT-SPECIFIC EPD.

INDUSTRY-WIDE EPD (IW-EPD).

ULTRAVIOLET (UV).

VISUAL MARKER.

CHAPTER 5

NONRESIDENTIAL MANDATORY MEASURES

DIVISION 5.1- PLANNING AND DESIGN

…

Division 5.1, Section 5.105 – Begins on page 5-1 of CALGreen

SECTION 5.105

DECONSTRUCTION AND REUSE OF EXISTING STRUCTURES

New code language and sections added to the formally reserved section.

5.105.1 Scope. [BSC-CG] Effective July 1, 2024, alteration(s) to existing building(s)

where the combined altered floor area is 100,000 square feet or greater shall comply

with either Section 5.105.2, 5.409.2, or 5.409.3. Addition(s) to existing building(s) where

the total floor area combined with the existing building(s) is 100,000 square feet or

greater shall comply with either Section 5.105.2, Section 5.409.2, or Section 5.409.3.

Effective January 1, 2026, the combined floor area shall be 50,000 square feet or

greater.

Exception: Combined addition(s) to existing building(s) of two times the area or

more of the existing building(s) is not eligible to meet compliance with Section

5.105.2.

INTENT:

The intent of Section 5.105 is to add new mandatory regulations for the reuse of existing

structures to help incentivize reuse of existing building infrastructure. Studies have

shown building reuse is associated with significant reductions in embodied carbon

emissions when compared with new construction. Building reuse cuts down on the

continual consumption of natural resources, energy and water-intensive industrial

processes, and greenhouse gas emissions.

At this time, these regulations do not apply to commercial buildings that are adapted

(modernized and repurposed) to be used for residential purposes, as these types of

projects are outside the scope of the Building Standards Commission’s (BSC) authority.

BSC promulgates CALGreen standards for nonresidential occupancies where no other

agency has authority to adopt green building standards, state buildings, and University

of California and California State University buildings. For example, OSHPD has

jurisdiction over hospitals and other health facilities.

School projects are subject to an area threshold that depends upon which authority the

project falls under. For school projects subject to DSA authority, the area threshold for

applicability of these provisions for new, renovation, and addition projects is 50,000

square feet. For school projects that fall under BSC authority, the area threshold for

applicability of these provisions is 100,000 square feet until December 31, 2025, after

which the area threshold will drop to 50,000 square feet.

The new scoping section requires additions and alterations with specified floor area

(project aggregate area) to comply with one of the three compliance options for the

reduction of embodied carbon: reuse of existing building covered in Section 5.105.2,

Whole Building Life Cycle Assessment (WBLCA) covered in Section 5.409.2, or product

GWP compliance covered in Section 5.409.3.

EXAMPLES:

1. A building of 300,000 square feet contains several suites occupied by different

tenants. There is a project to alter two suites, one suite of 50,000 square feet and

the other of 60,000 square feet, with the rest of the building, containing several more

suites, being unaltered. The combined altered floor area equals 110,000 square feet

(50,000 square feet plus 60,000 square feet) which is over 100,000 square feet.

Therefore, the work in both suites being altered has to comply with either Section

5.105.2 (building reuse), Section 5.409.2 (WBLCA), or Section 5.409.3 (product

GWP compliance).

2. An addition of 5,000 square feet is proposed to be added to existing building of

95,000 square feet. The total floor area of the addition combined with the existing

building area is 100,000 square feet. Therefore, the project has to comply with either

Section 5.105.2, Section 5.409.2, or Section 5.409.3.

Note: The entirety of the existing building can be considered in calculating the

required percentage for the compliance with Section 5.105.2 (building reuse

compliance option).

3. A commercial building of 30,000 square feet is proposed to have two additions: one

of 25,000 square feet and the other of 35,000 square feet. The total area of the

additions plus the area of the existing building is 90,000 square feet, which is less

than the 100,000 square feet threshold. This project is not required to comply with

either Section 5.105.2, Section 5.409.2, or Section 5.409.3.

4. A retail building of 200,000 square feet is proposed to have 80,000 square feet of

area undergo alterations. The altered area is less than 100,000 square feet, so this

project is not required to comply with either Section 5.105.2, Section 5.409.2, or

Section 5.409.3.

5.105.2 Reuse of existing building. An alteration or addition to an existing building

shall maintain at a minimum 45 percent combined of the existing building’s primary

structural elements (foundations; columns, beams, walls, and floors; and lateral

elements) and existing building enclosure (roof framing, wall framing and exterior

finishes). Window assemblies, insulation, portions of buildings deemed structurally

unsound or hazardous, and hazardous materials that are remediated as part of the

project shall not be included in the calculation.

5.105.2.1 Verification of compliance. Documentation shall be provided in the

construction documents to demonstrate compliance with Section 5.105.2.

Note: Sample Worksheet WS-3 in Chapter 8 may be used to assist in

documenting compliance with this section.

5.105.3 Deconstruction (Reserved)

INTENT:

The intent of these mandatory requirements is to encourage reuse of existing buildings

and components, as well as provide guidance on what building components to be

included in calculations, and to minimize potential landfill deposits. The regulations do

not require reuse of an existing building, but require, if an addition or alteration to an

existing building occurs (i.e., the building is being reused), a minimum 45 percent of the

existing building primary structural elements and enclosure to be maintained. This is the

first, and in many cases the most direct and simple, pathway available to comply with

the embodied carbon reduction regulations.

Most building reuse (alteration and addition) projects will meet the 45 percent

requirement. If this cannot be achieved (project does not meet the 45 percent

requirement or addition area is more than double the existing building area), there are

two other compliance pathways (WBLCA and product GWP compliance) available.

Studies have shown building reuse almost always offers environmental savings over

demolition and new construction, when comparing buildings of equivalent size and

function. There is also an economic factor to be considered. There is an established

value to reusing existing structures and materials.

New reserved Section 5.105.3 about deconstruction is added as a placeholder for future

use to address the deconstruction portion of the main section.

COMPLIANCE METHOD:

Maintain the existing building primary structure (foundations, columns, beams, walls

(only those which contribute to structural stability of the building), floors (including floor

and roof decking) and enclosure (exterior skin and framing, excluding window

assemblies and insulation). Structurally unsound or hazardous portions of buildings, and

hazardous materials may be excluded, but clear and specific documentation should be

provided to use this exclusion.

Determine and identify on the construction documents the compliance option used to

comply with the embodied carbon reduction requirements. Identify elements of the

existing building that can be reused and determine the percentage of existing elements

that are retained. Provide calculations demonstrating a minimum 45 percent of the

existing building primary structural elements and enclosure are maintained. Show on a

demolition, site or building plan.

RECOMMENDATION:

For many projects a simple area analysis will be sufficient to demonstrate that

percentages exceed the required 45 percent. For cases where significant alterations

include changes in walls and portions of the structural system, or in situations where the

percentages are not clearly compliant without additional detail, it will be necessary to

prepare a spreadsheet listing all primary structural and enclosure elements within the

existing building prior to construction or renovation; and areas where members that are

part of the primary structural system are being removed or altered.

An alternate method which allows even greater detail, when necessary, may use the

“projected areas” (in elevation for vertical structural members and building enclosure,

and in plans for horizontal structural members) of individual structural elements and

building enclosure, evaluated in a spreadsheet so as to show existing areas, and areas

of the proposed final configuration. The percentage in any of the above methods will be

determined by dividing the square footage of the total retained materials area by the

square footage of the total existing materials area. The building official can request

additional detail, in any case where the percentage area being retained is not clear.

Note: The reuse calculations can be based on gross affected areas; or the surface

areas of building primary structural and enclosure elements with measurements

taken as if preparing a bid for construction of a building.

The design professional would indicate the method they are using to demonstrate

compliance, and fill out and include Worksheet WS-3, which is added to CALGreen

Chapter 8, in the construction documents to demonstrate compliance. Use of the

Worksheet is not mandatory, as the compliance may be shown by other means.

However, use of the worksheet can help design professionals in showing compliance

and assist local jurisdictions with enforcement.

EXAMPLES:

1. An office building of 50,000 square feet is planned for the following scope of work:

a. Alterations to 35,000 square feet that do not affect the building primary

structural elements.

b. Additions of 10,000 square feet and 90,000 square feet.

Step 1: Section 5.105.1 Scope.

The total of the addition area, plus the existing building area, equals 150,000 square

feet, so this project is required to comply with either Section 5.105.2 (building reuse),

Section 5.409.2 (WBLCA), or Section 5.409.3 (product GWP compliance).

Step 2: Exception to Section 5.105.1 Scope.

The total addition area of 100,000 square feet, is two times the area of the existing

building, so this project is not eligible to comply with Section 5.105.2 and must

comply with either Section 5.409.2 or Section 5.409.3.

2. An office building of 50,000 square feet is planned for the following scope of work:

a. Alterations to 35,000 square feet that do not affect the building primary

structural elements. Existing building enclosure is mostly maintained but

existing window assemblies and insulation are being replaced.

b. Additions of 10,000 square feet and 80,000 square feet.

c. Demolition of 15,000 square feet of the existing structure to result in a ‘u’

shape to be able to provide more natural light.

Step 1: Section 5.105.1 Scope.

The total of the additions area combined with the existing building area, equals

140,000 square feet, so this project is required to comply with either (building reuse),

Section 5.409.2 (WBLCA), or Section 5.409.3 (product GWP compliance).

Step 2: Exception to Section 5.105.1 Scope.

The total additions area of 90,000 square feet, is less than two times the area of the

existing building, so the project is eligible to use Section 5.105.2 for compliance.

Step 3: Calculations for Section 5.105.2 Reuse of existing building.

The project maintains 70 percent of the existing building floor area. Projects where

anticipated reused floor area exceeds the minimum compliance threshold of 45

percent by a comfortable margin (projects where anticipated reused floor area

exceeds roughly 60 percent) may be able to demonstrate compliance through a

simplified calculation based on existing, demolished, and retained floor area only.

Since 70 percent exceeds the minimum compliance threshold of 45 percent by a

comfortable margin, this project can demonstrate compliance by providing either the

sample Worksheet WS-3, or a floor area analysis supplemented with a graphic area

diagram. A compliance calculation summary is provided below for this example:

DOCUMENTATION OF COMPLIANCE OF EXISTING BUILDING REUSE:

Area of Existing Building 50,000 SF

Area of Aggregate Additions 90,000 SF

Existing Total

Area

(A)

Retained Total

Area

(B)

% of Retained

Structure

(B)/(A)

Gross floor area

of Existing

Building

50,000 SF 35,000 SF 70%

Total % Reuse of Required Elements = 70%

3. An office building of 50,000 square feet is planned for the following scope of work:

a. Alterations to 25,000 square feet that do not affect the building primary

structural elements.

b. Additions of 10,000 square feet and 40,000 square feet.

c. Demolition of 25,000 square feet.

Step 1: Section 5.105.1 Scope.

The total of the additions area combined with the existing building area, equals

100,000 square feet (50,000 square feet plus 10,000 square feet plus 40,000 square

feet), so this project is required to comply with either Section 5.105.2 (building

reuse), Section 5.409.2 (WBLCA), or Section 5.409.3 (product GWP compliance).

Step 2: Exception to Section 5.105.1 Scope.

Combined additions area equals 50,000 square feet, which is not greater than

double the area of the existing building, so the project is eligible to use Section

5.105.2 for compliance.

Step 3: Calculations for Section 5.105.2 Reuse of existing building.

The demolition proposed is 50 percent of the existing building. Since 50 percent

does not exceed the minimum compliance threshold of 45 percent by a comfortable

margin, it is recommended that the project team completes Worksheet WS-3 to

provide a more detailed component-based calculation. The results of the

component-based calculation are provided below for this example, along with

guidance for calculating the area of key structural components.

Component

Guidance for area calculations

Foundations

Surface area

Slabs

Gross floor area

Lateral Elements

Surface area of longitudinal face

Columns

Surface area of longitudinal column face

Structural Walls

Surface area (one side)

Cladding / Envelope

Surface area (one side)

DOCUMENTATION OF COMPLIANCE OF EXISTING BUILDING REUSE:

Area of Existing Building 50,000 SF

Area of Aggregate Additions 50,000 SF

Existing Total

Area

(A)

Retained Total

Area

(B)

% of Retained

Structure

(B)/(A)

Primary Structural

Elements of Existing

Building(s)

(foundations; columns,

beams, walls, and

floors; and lateral

elements)

57,000 SF 29,000 SF 51%

Building Enclosure of

Existing Building(s)

(roof framing, wall

framing and exterior

finishes only)

40,000 SF 17,000 SF 43%

Total % Reuse of Required Elements = 47%

Note: If the demolition in this example was due to structural conditions that were

deemed hazardous—for example, removal of unreinforced hollow clay tile bearing

walls—the calculation could show a greater percentage of building reuse.

4. A warehouse building of 150,000 square feet is planned for the following scope of

work:

Alterations to 100,000 square feet of the building to demolish the existing roof

structure and columns to allow for construction of a new roof system, supported

by new columns with a higher interior ceiling height than exists in the current

building geometry.

Step 1: Section 5.105.1 Scope.

The total combined altered floor area is 100,000 square feet, so this project is

required to comply with either Section 5.105.2 (building reuse), Section 5.409.2

(WBLCA), or Section 5.409.3 (product GWP compliance).

Step 2: Exception to Section 5.105.1 Scope.

No additions are planned, so the project is eligible to use Section 5.105.2 for

compliance.

Step 3: Calculations for Section 5.105.2 Reuse of existing building.

It is not possible to use simple gross floor area calculations in this example as large

portion of the existing building is altered including primary structural elements and

existing building enclosure, it is recommended that the project team completes

Worksheet WS-3 in a similar manner as shown in Example 3 above.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the pathway used to comply with

Section 5.105.2 requirements for building reuse is identified on the construction

documents and should review the plans and calculations that show the required

percentages of the retained building primary structural elements and enclosure. Use of

the Worksheet WS-3 is not mandatory, as the compliance may be shown by other

means. However, use of the Worksheet can help design professionals in showing

compliance and assist local jurisdictions with enforcement.

On-site enforcement: The inspector should review the permit set of plans and verify on-

site that the existing primary structural elements and enclosure are maintained as shown

in the approved set of construction documents.

SECTION 5.106

SITE DEVELOPMENT

...

Section 5.106.5.3 – Begins on page 5-3 of CALGreen and on page 23 of the 2022

Guide.

Amended code language.

...

5.106.5.3 Electric vehicle (EV) charging. [N] [BSC-CG] Construction to provide

electric vehicle infrastructure and facilitate electric vehicle charging shall comply with

Section 5.106.5.3.1 EV capable spaces, Section 5.106.5.3.2 Electric vehicle charging

stations and associated Table 5.106.5.3.1, or Section 5.106.5.3.6 Electric vehicle

charging stations (EVCS)-Power allocation method and associated Table 5.106.5.3.6

and shall be provided in accordance with regulations in the California Building Code and

the California Electrical Code.

Exceptions: ... 5.106.5.3.1 EV capable spaces. [N] ...

Amended code language.

5.106.5.3.2 Electric vehicle charging stations (EVCS). EV capable spaces

shall be provided with electric vehicle supply equipment (EVSE) to create EVCS

in the number indicated in Table 5.106.5.3.1. The EVCS required by Table

5.106.5.3. shall be provided with Level 2 EVSE or DCFC as permitted in Section

5.106.5.3.2.1. At least one Level 2 EVSE shall be provided.

One EV charger with multiple connectors capable of charging multiple EVs

simultaneously shall be permitted if the electrical load capacity required by

Section 5.106.5.3.1 for each EV capable space is accumulatively supplied to the

EV charger.

New code sections and language added.

5.106.5.3.2.1 The installation of each DCFC EVSE shall be permitted to

reduce the minimum number of required EV capable spaces without

EVSE or EVCS with Level 2 EVSE by five and reduce proportionally the

required electrical load capacity to the service panel or subpanel.

5.106.5.3.2.2 The installation of two Low Power Level 2 EV charging

receptacles shall be permitted to reduce the minimum number of required

EV capable spaces without EVSE in Table 5.106.5.3.1 by one.

5.106.5.3.3 Use of automatic load management systems (ALMS)... .

5.106.5.3.4 Accessible electric vehicle charging station (EVCS). When EVSE

is installed, accessible EVCS shall be provided in accordance with the California

Building Code Chapter 11B, Section 11B-228.3.

Note: Note is stricken and added as a new code requirement in

Section 5.106.5.3.5 below.

New code language.

5.106.5.3.5 Electric vehicle charging station signage. Electric vehicle

charging stations shall be identified by signage or pavement markings in

compliance with Caltrans Traffic Operations Policy Directive 13-01 (Zero

Emission Vehicle Signs and Pavement Markings) or its successor(s).

Amended Table (footnote 3 added)

TABLE 5.106.5.3.1

TOTAL NUMBER OF

ACTUAL PARKING

SPACES

NUMBER OF

REQUIRED EV

CAPABLE SPACES

NUMBER OF EVCS

(EV CAPABLE

SPACES PROVIDED

WITH EVSE)

2 & 3

0-9

10-25

26-50

51-75

76-100

101-150

151-200

201 and over

20 percent of actual

parking spaces

25 percent of EV

capable spaces

1. Calculation for spaces shall be rounded up to the nearest whole number.

2. The number of required EVCS (EV capable spaces provided with EVSE) in

column 3 count toward the total number of required EV capable spaces

shown in column 2.

3. At least one Level 2 EVSE shall be provided.

New code language (Power allocation method).

5.106.5.3.6 Electric vehicle charging stations (EVCS)-Power allocation

method. The Power allocation method may be used as an alternative to the

requirements in Section 5.106.5.3.1, Section 5.106.5.3.2 and associated Table

5.106.5.3.1. Use Table 5.106.5.3.6 to determine the total power in kVA required

based on the total number of actual parking spaces.

Power allocation method shall include the following:

1. Use any kVA combination of EV capable spaces, Low Power Level 2,

Level 2 or DCFC EVSEs.

2. At least one Level 2 EVSE shall be provided.

New Table (Power allocation method)

TABLE 5.106.5.3.6

TOTAL

NUMBER OF

ACTUAL

PARKING

SPACES

MINIMUM

TOTAL kVA @

6.6 kVA

TOTAL kVA REQUIRED IN ANY

COMBINATION OF EV

CAPABLE

3,4

, LOW POWER

LEVEL 2, LEVEL 2

1, 2

, OR DCFC

0-9

10-25

26.4

26-50

52.8

51-75

85.8

76-100

112.2

101-150

165

151-200

231

201 and over

20 percent of

actual parking

spaces x 6.6

Total required kVA = P x .20 x 6.6

Where P=Parking spaces in facility

1. Level 2 EVSE @ 6.6 kVA minimum.

2. At least one Level 2 EVSE shall be provided.

3. Maximum allowed kVA to be utilized for EV capable spaces is 75 percent.

4. If EV capable spaces are utilized, they shall meet the requirements of

Section 5.106.5.3.1 EV capable spaces.

INTENT

Some changes have been made to expand the compliance methods to further the

installation of electric vehicle charging stations (EVCS).

Note: For newly added regulations applicable to additions and alterations refer to

the new code Section 5.106.5.4 Additions or alterations to existing buildings or

parking facilities.

Change for 2022 Intervening Cycle Supplement: BSC made several amendments as

follows:

• Amended Section 5.106.5.3 Electric vehicle (EV) charging to clarify that compliance

with EV charging regulations can be achieved using the requirements in Section

5.106.5.3.1 EV capable, Section 5.106.5.3.2 EVCS and associated Table

5.106.5.3.1, or Section 5.106.5.3.6 Electric vehicle charging stations (EVCS)-Power

allocation method and associated Table 5.106.5.3.6.

• Amended Section 5.106.5.3.2 to allow the use of one DCFC to be substituted for five

Level 2 EVSE. Currently one DCFC is allowed to be substituted for five EV capable

spaces without EVSE. BSC added a new code Section 5.106.5.3.2.1 to allow for

DCFCs to be substituted on a 1-to-5 ratio for both EV capable spaces (already

allowed) or independently Level 2 EVSEs. Additional changes include adding a new

code Section 5.106.5.3.2.2 to allow the use of Low Power Level 2 receptacles to be

substituted for EV capable spaces without EVSE. The specific amendment allows for

two Low Power Level 2 charging receptacles to be permitted to reduce the minimum

number of required EV capable spaces without EVSE by one.

• A new code Section 5.106.5.3.5 Electric vehicle charging station signage has been

added to replace the “Note” for EVCS signs previously under Section 5.106.5.3.4.

• Some edits were made to Table 5.106.5.3.1 column 2 and footnote 3 has been

added.

• Lastly, BSC added a new code Section 5.106.5.3.6 Electric vehicle charging stations

(EVCS)-Power allocation method and associated new Table 5.106.5.3.6 with

footnotes. The table is solely based on power in kVA and is meant to be used in lieu

of the EV charging requirements in Section 5.106.5.3.1 and associated Table

5.106.5.3.1. This proposed alternative was crafted using the required power

allocation in amps for the EV capable spaces from Table 5.106.5.3.1 so the two

tables are meant to be equals; using either table would achieve the same amount of

power allotment.

SUGGESTION:

Where EV charging stations are installed, anticipate accessibility requirements per

the California Building Code, Part 2, Chapter 11B, Section 11B-228.3. Locate the

charging stations and EV capable spaces near the entrance to the building, and in a

parking area that can easily accommodate compliance with accessibility regulations

for the installed chargers and future EVSE installations. Properly locating the EV

capable spaces or EV charging stations can reduce potential accessibility issues.

COMPLIANCE METHOD:

Include on the construction documents the proposed location of the listed suitable

cabinet(s), box(es), enclosure(s) or equivalent required for future EV equipment

connections. Indicate on the plans the required service panel capacity with raceway

to the approximate location of the future EV charging connections as required in

Section 5.106.5.3 and related Table 5.105.5.3.1 or independently Section

5.106.5.3.6 and related Table 5.106.5.3.6 when using the power allocation method.

Refer to the previously mentioned code sections to determine the required number

of EV capable spaces and the required number of EVCS. Lastly, for EV capable

spaces, ensure that the service panel(s) or subpanel(s) circuit directory is properly

identified as being “EV CAPABLE” and that the raceway termination location is

permanently and visibly marked as “EV CAPABLE.”

RECOMMENDATION:

The construction documents should reflect the EV electrical load capacity needed to

accommodate the total number of required EV capable spaces and EVCS as

required per Table 5.106.5.3.1 or independently Table 5.106.5.3.6 when using the

power allocation method. Refer to Section 5.106.5.3.2.1 for DCFC ratio allowance as

a method of compliance with EV capable spaces and EVCS installations, and

Section 5.106.5.3.3 for the permitted use of an ALMS for compliance with EVCS

installations. Refer to new Section 5.106.5.3.2.2 for the permitted use of Low Power

Level 2 EV charging receptacles. Include all parking spaces in the calculation when

determining the required EV capacity.

EXAMPLES:

1. Assume 55 total actual parking spaces using Table 5.106.5.3.1 or Table

5.105.5.3.6: The scenarios 1 and 2 below use the allowed compliance

methods. Based on Table 5.106.5.3.1, provide capacity for 13 EV capable

spaces with three of those spaces equipped with EVSE. The net result is ten

EV capable and three EVSE (which can be either Level 2 or DCFC). The use

of DCFCs may reduce the number of required EV capable spaces or

independently EVCS as per Section 5.106.5.3.2.1. Also, the installation of

Low Power Level 2 EV charging receptacles per new Section 5.106.5.3.2.2 is

permitted to reduce the minimum number of required EV capable spaces.

Additionally, ALMS can be used to reduce the electrical load as per Section

5.106.5.3.3.

Scenario 1 for 55 spaces using Table 5.106.5.3.1: If two DCFCs are

installed, using DCFC allowance for both EV capable spaces and

independently EVCS, those two installed DCFCs can be used to comply with

ten EV capable spaces and independently five EVCS. This would eliminate

the requirement for EV capable spaces in column 2 and complies with the

three required EVCS in column 3. Due to the table added footnote 3, at least

one Level 2 EVSE is still required. The result for compliance using this

scenario is the installation of two DCFCs and one Level 2 EVSE.

Note: There are other possible combinations for compliance with the EV

Table 5.106.5.3.1 and new Table 5.106.5.3.6.

Scenario 2 for 55 spaces using new Table 5.106.5.3.6 (Power allocation

method): Looking at row 3 (51-75 spaces) the total power needed is set at

85.8 kVA. Looking at column 3 for the total required kVA, any combination of

EV capable, Low Power Level 2, Level 2, or DCFC can be used for

compliance.

Use the formula for Kilovolt-amps (kVA) to Kilowatts (kW) which is:

Apparent power (kVA) x power factor (pf) = actual power (kW)

to determine the kW needed for the chargers.

The required 85.8 kVA is multiplied by 0.8 (pf) = 68.64 kW actual power.

To meet the kVA power requirement, provide one DCFC rated at 60kW and

one Level 2 EVSE rated at 9kW or greater. The new table footnote 2 requires

that at least one Level 2 be installed. The result for compliance using this

scenario and the power allocation method is the installation of one DCFC and

one Level 2 EVSE.

Note: There are other possible combinations for compliance with the EV

Table 5.106.5.3.1 and new Table 5.106.5.3.6. One additional option when

using Table 5.106.5.3.6 based on footnote 3, the maximum allowed kVA

to be utilized for EV capable spaces is 75 percent.

2. Assume 240 total actual parking spaces using Table 5.106.5.3.1 or Table

5.105.5.3.6: The scenarios 1 and 2 below use the allowed compliance

methods. Based on Table 5.106.5.3.1, provide capacity for 48 EV capable

spaces with 12 of those spaces equipped with EVSE. The net result is 36 EV

capable and 12 EVSE (which can be either Level 2 or DCFC). The use of

DCFCs may reduce the number of required EV capable spaces or

independently EVCS as per Section 5.106.5.3.2.1. Also, the installation of

Low Power Level 2 EV charging receptacles per new Section 5.106.5.3.2.2 is

permitted to reduce the minimum number of required EV capable spaces.

Additionally, ALMS can be used to reduce the electrical load as per Section

5.106.5.3.3.

Scenario 1 for 240 spaces using Table 5.106.5.3.1: If seven DCFCs are

installed, using DCFC allowance for both EV capable spaces and

independently EVCS, those seven installed DCFCs can be used to comply

with 35 EV capable spaces and independently 12 EVCS. This would reduce

the requirement for EV capable spaces in column 2 from net 36 to 35 and

complies with the 12 required EVCS in column 3. Due to table footnote 3, at

least one Level 2 EVSE is still required. The result for compliance using this

scenario is the installation of seven DCFCs, one EV capable and one Level 2

EVSE.

Note: There are other possible combinations for compliance with the EV

Table 5.106.5.3.1 and new Table 5.106.5.3.6.

Scenario 2 for 240 spaces using new Table 5.106.5.3.6 (Power allocation

method): Looking at row 8 (201 and over spaces) the total power needed is

240 x 20 percent x 6.6 kVA = 316.8 kVA. Looking at column 3 for the total

required kVA, any combination of EV capable, Low Power Level 2, Level 2, or

DCFC can be used for compliance.

Use the formula for Kilovolt-amps (kVA) to Kilowatts (kW) which is:

Apparent power (kVA) x power factor (pf) = actual power (kW)

to determine the kW needed for the chargers.

The required 316.8 kVA is multiplied by 0.8 (pf) = 253.44 kW actual power.

To meet the kVA power requirement of 253.44kVA, provide four DCFC rated

at 60kW = 240kW and two Level 2 EVSE rated at 9kW or greater = 18kVA;

therefore 240kVA +18kVA= 258kVA—which is greater than 253.44kVA—

complies. The new table footnote 2 requires that at least one Level 2 be

installed. The result for compliance using this scenario and the power

allocation method is the installation of four DCFC and two Level 2 EVSE.

Note: There are other possible combinations for compliance with the EV

Table 5.106.5.3.1 and new Table 5.106.5.3.6. One additional option when

using Table 5.106.5.3.6 based on footnote 3, the maximum allowed kVA

to be utilized for EV capable spaces is 75 percent.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the construction documents are

compliant with Section 5.106.5.3 and related Table 5.106.5.3.1 or independently

Section 5.106.5.3.6 and related Table 5.106.5.3.6 when using the power allocation

method. Also, confirm that the necessary electrical load capacity for EV connections

to the required number of EV capable spaces and EVCS per Table 5.106.5.3.1 or

Table 5.106.5.3.6 has been provided. Confirm proper identification for EV capable

spaces at the service panel(s) or subpanel(s) and that the raceway termination

location is permanently and visibly marked as “EV CAPABLE.”

On-site enforcement: The inspector should verify on-site that the service panel and

raceway with proper termination have been installed for EV capable spaces per the

approved set of construction documents. For installed EVSE, the inspector should

verify that installed EV equipment complies with the construction plans and

specifications.

Section 5.106.5.4 – Begins on page 5-4 of CALGreen and on page 27 of the 2022

Guide.

New code language.

5.106.5.4 Additions or Alterations to existing buildings or parking facilities [A].

[BSC-CG] Existing buildings or parking facilities being modified by one of the following,

shall comply with Section 5.106.5.4.1 or 5.106.5.4.2. When EVSE is installed,

accessible EVCS shall be provided in accordance with the California Building Code,

Chapter 11B, Section 11B-228.3.

1. When the scope of construction work includes an increase in power supply to an

electric service panel as part of a parking facility addition or alteration.

2. When a new photovoltaic system is installed covering existing parking spaces.

3. When additions or alterations to existing buildings are triggered pursuant to code

Section 301.3 and the scope of work includes an increase in power supply to an

electric service panel.

Exceptions:

1. On a case-by-case basis where the local enforcing agency has determined

compliance with this section is not feasible based upon one of the following

conditions:

a. Where there is no local utility power supply.

b. Where the local utility is unable to supply adequate power.

c. Where there is evidence suitable to the local enforcement agency

substantiating that additional local utility infrastructure design

requirements, directly related to the implementation of Section

5.106.5.3, may adversely impact the construction cost of the project.

d. Where demonstrated as impracticable excluding local utility service or

utility infrastructure issues.

2. Remote parking facilities that do not have access to the building service

panel.

3. Parking area lighting upgrades where no trenching is part of the scope of

work.

4. Emergency repairs including but not limited to, water line break in parking

facilities, natural disaster repairs, etc.

5.106.5.4.1 Existing buildings or parking areas without previously installed EV

capable infrastructure [A]. When EV capable infrastructure does not exist at an

existing parking facility or building, and the parking facility or building undergoes an

addition or alteration listed in Section 5.106.5.4, construction shall include electric

vehicle charging in compliance with either Section 5.106.5.3 and associated Table

5.106.5.3.1, or Section 5.106.5.3.6 and associated Table 5.106.5.3.6 for the total

number of actual parking spaces being added or altered.

5.106.5.4.2 Existing buildings or parking areas with previously installed EV

capable infrastructure [A]. When EV capable infrastructure is available at an

existing parking facility or building, and the parking facility or building is undergoing an

addition or alteration listed in Section 5.106.5.4, construction shall include electric

vehicle charging in compliance with either Section 5.106.5.3 and associated Table

5.106.5.3.1, or Section 5.106.5.3.6 and associated Table 5.106.5.3.6 utilizing the

existing EV capable allocated power and infrastructure for the total number of actual

parking spaces being added or altered. If the area being added or altered exceeds the

existing EV capable capacity, allocated power and infrastructure, provide additional

EV charging as needed to comply with this section.

INTENT:

The intent of this new mandatory code section is to expand the EV requirements for

qualifying additions and alterations. These new code changes will support the

implementation of the governor’s Executive Orders B-16-2012, B-48-2018 and N-79-20

to achieve a benchmark for having over 1.5 million zero-emission vehicles (ZEVs) on

California roadways by 2025, 5 million ZEVs on California roadways by 2030,

and 100 percent sales of electric vehicles by 2035, respectively.

Changes for 2022 Intervening Cycle Supplement: BSC added a new code Section

5.106.5.4 Additions or alterations to existing buildings or parking facilities.

This code section requires the installation of EV charging for qualifying additions and

alterations for a property owner or manager to meet EV charging requirements similar to

those required for new construction. In essence there are two compliance methods for

the new proposed code change: either comply with Section 5.106.5.4.1 or 5.106.5.4.2,

as applicable.

5.106.5.4.1. This code section is triggered when existing buildings or parking areas

without previously installed EV capable infrastructure undergo a qualifying addition or

alteration as listed in Section 5.106.5.4 and is only applicable when parking spaces are

being added or altered.

5.106.5.4.2. This code section is triggered when existing buildings or parking areas with

previously installed EV capable infrastructure undergo a qualifying addition or alteration

as listed in Section 5.106.5.4 and is only applicable when parking spaces are being

added or altered.

SUGGESTION:

Refer to the accessibility requirements found in the California Building Code, Chapter

11B, Section 11B-228.3 when locating the EV capable spaces or EV charging stations.

Properly locating the EV capable spaces or EV charging stations can reduce potential

accessibility issues.

COMPLIANCE METHOD:

When there is a qualifying addition or alteration and when the existing buildings or

parking areas do not have previously installed EV capable infrastructure; include on the

construction documents the proposed location of the listed suitable cabinet(s), box(es),

enclosure(s) or equivalent required for future EV equipment connections. Indicate on

the plans the required service panel capacity with raceway to the approximate location

of the future EV charging connections as required in Section 5.106.5.3 and related

Table 5.105.5.3.1 or independently Section 5.106.5.3.6 and related Table 5.106.5.3.6

when using the power allocation method. Refer to the previously mentioned code

sections and tables to determine the required number of EV capable spaces and the

required number of EVCS.

When there is a qualifying addition or alteration and the existing buildings or parking

areas have previously installed EV capable infrastructure; include on the construction

documents the existing location of the listed suitable cabinet(s), box(es), enclosure(s) or

equivalent required for EV equipment connections. Construction documents shall

include electric vehicle charging in compliance with either Section 5.106.5.3 and

associated Table 5.106.5.3.1, or Section 5.106.5.3.6 and associated Table 5.106.5.3.6,

utilizing the existing EV capable allocated power and infrastructure for the total number

of actual parking spaces being added or altered.

If the area being added or altered exceeds the existing EV capable capacity, allocated

power, and infrastructure, provide additional EV charging as needed to comply with this

section. Build out all existing EV capable spaces utilizing the existing EV capable

allocated power and infrastructure for the total number of actual parking spaces being

added or altered prior to adding any new EV capable spaces.

For EV capable spaces in both scenarios, ensure that the service panel or subpanel(s)

circuit directory is properly identified as being “EV CAPABLE” and that the raceway

termination location is permanently and visibly marked as “EV CAPABLE.”

EXAMPLES:

Refer to Section 5.106.5.3.2 above for examples using the various parking space

numbers and calculation methods. Note that there are various compliance options.

ENFORCEMENT:

Refer to code Section 5.106.5.3.2 above for plan review and on-site enforcement

methods.

Space Intentionally Blank

Section 5.106.5.5 (former section 5.106.5.4) – Begins on page 5-4 of CALGreen and

on page 27 of the 2022 Guide.

Amended and renumbered code language.

5.106.5.5 Electric vehicle (EV) charging: medium-duty and heavy-duty. [N] [BSC-

CG] Construction shall comply with Section 5.106.5.5.1 to facilitate future installation of

electric vehicle supply equipment (EVSE). Construction for warehouses, grocery stores,

retail stores, office buildings, and manufacturing facilities with planned off-street loading

spaces shall also comply with Section 5.106.5.5.1 for future installation of medium- and

heavy-duty EVSE.

Exceptions:

1. On a case-by-case basis where the local enforcing agency has determined

compliance with this section is not feasible based upon one of the following

conditions:

a. Where there is no local utility power supply.

b. Where the local utility is unable to supply adequate power.

c. Where there is evidence suitable to the local enforcing agency

substantiating that additional local utility infrastructure design

requirements, directly related to the implementation of Section 5.106.5.3,

may adversely impact the construction cost of the project.

When EVSE(s) is/are installed, it shall be in accordance with the California Building

Code, the California Electrical Code and as follows:

Amended and renumbered code language.

5.106.5.5.1 Electric vehicle charging readiness requirements for warehouses,

grocery stores and retail stores, office buildings, and manufacturing facilities

with planned off-street loading spaces [N]

In order to avoid future demolition when adding EV supply and distribution

equipment, spare raceway(s) or busway(s) and adequate capacity for

transformer(s), service panel(s) or subpanel(s) shall be installed at the time of

construction in accordance with the California Electrical Code. Construction plans

and specifications shall include, but are not limited to, the following:

1. The transformer, main service equipment and subpanels shall meet the minimum

power requirement in Table 5.106.5.5.1 to accommodate the dedicated branch

circuits for the future installation of EVSE.

2. The construction documents shall indicate one or more location(s) convenient to

the planned off-street loading space(s) reserved for medium- and heavy-duty

ZEV charging cabinets and charging dispensers, and a pathway reserved for

routing of conduit from the termination of the raceway(s) or busway(s) to the

charging cabinet(s) and dispenser(s), as shown in Table 5.106.5.5.1.

3. Raceway(s) or busway(s) originating at a main service panel or a subpanel(s)

serving the area where potential future medium- and heavy-duty EVSE will be

located and shall terminate in close proximity to the potential future location of

the charging equipment for medium- and heavy-duty vehicles.

4. The raceway(s) or busway(s) shall be of sufficient size to carry the minimum

additional system load to the future location of the charging for medium- and

heavy-duty ZEVs as shown in Table 5.106.5.5.1.

Amended and Renumbered Table

TABLE 5.106.5.5.1

RACEWAY CONDUIT AND PANEL POWER

REQUIREMENTS FOR MEDIUM-AND-HEAVY-DUTY EVSE [N]

Building Type

Building Size

(sq. ft.)

Number of Off-

street loading

spaces

Additional capacity

Required (kVa) for

Raceway & Busway and

Transformer & Panel

Grocery

…

Retail

…

Warehouse

…

Manufacturing

Facilities

10,000 to 50,000

1 or 2

200

Manufacturing

Facilities

10,000 to 50,000

3 or Greater

400

Manufacturing

Facilities

Greater than

50,000

1 or Greater

400

Office

Buildings

10,000 to

135,000

1 or 2

200

Office

Buildings

10,000 to

135,000

3 or Greater

400

Office

Buildings

Greater than

135,000

1 or Greater

400

INTENT:

There were some changes made to expand the installation of electric vehicle charging

stations (EVCS) for medium-duty and heavy-duty vehicle parking spaces to include

manufacturing facilities and office buildings occupancy types, when applicable.

Change for 2022 Intervening Cycle Supplement: BSC, in coordination with CARB,

introduced additional occupancies to meet the requirements for EV infrastructure for

medium- and heavy-duty ZEVs.

COMPLIANCE METHOD:

No change to compliance method. Refer to the 2022 CALGreen Guide for specific

information.

ENFORCEMENT:

No change to enforcement. Refer to the 2022 CALGreen Guide for specific information.

DIVISION 5.4 - MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

Division 5.4, Section 5.401 – Begins on page 5-13 of CALGreen and on page 39 of

the 2022 Guide.

SECTION 5.401

GENERAL

Amended code language.

5.401.1 Scope. The provisions of this chapter specify the requirements of achieving

material conservation, resource efficiency, and greenhouse gas (GHG) emission

reduction through protection of buildings from exterior moisture, construction waste

diversion, employment of techniques to reduce pollution through recycling of materials,

the installation of products with lower GHG emissions and building commissioning or

testing and adjusting.

Change for 2022 Intervening Cycle Supplement: Section has been amended to

include greenhouse gas (GHG) emission reduction and provide clarity.

SECTION 5.409

LIFE CYCLE ASSESSMENT

Section 5.409 – Begins on page 5-15 of CALGreen.

…

New code language added to the formerly reserved section.

5.409.1 Scope.

[BSC-CG] Effective July 1, 2024, projects consisting of newly constructed building(s)

with a combined floor area of 100,000 square feet or greater shall comply with either

Section 5.409.2, or Section 5.409.3. Alteration(s) to existing building(s) where the

combined altered floor area is 100,000 square feet or greater shall comply with either

5.105.2, 5.409.2, or 5.409.3. Addition(s) to existing building(s) where the total floor area

combined with the existing building(s) is 100,000 square feet or greater shall comply

with either Section 5.105.2, Section 5.409.2, or Section 5.409.3. Effective January 1,

2026, the combined floor area shall be 50,000 square feet or greater.

INTENT:

The intent of Section 5.409 is to add new mandatory regulations for the Whole Building

Life Cycle Assessment (WBLCA) and Product Global Warming Potential (GWP)

compliance pathways, giving design professionals two additional methods to comply

with embodied carbon reduction requirements.

At this time, these regulations do not apply to commercial buildings that are adapted

(modernized and repurposed) to be used for residential purposes, as these types of

projects are outside the scope of BSC’s authority. BSC promulgates CALGreen

standards for nonresidential occupancies where no other agency has authority to adopt

green building standards, state buildings, and University of California and California

State University buildings. For example, OSHPD has jurisdiction over hospitals and

other health facilities.

School projects are subject to an area threshold that depends upon which authority the

project falls under. For school projects subject to DSA authority, the area threshold for

applicability of these provisions for new, renovation, and addition projects is 50,000

square feet. For school projects that fall under BSC authority, the area threshold for

applicability of these provisions is 100,000 square feet until December 31, 2025, after

which the area threshold will drop to 50,000 square feet.

The new scoping section requires a newly constructed buildings with specified floor

area to comply with either of the two embodied carbon reduction pathways: WBLCA as

described further in Section 5.409.2; or product GWP compliance as described further

in Section 5.409.3. The applicant determines which of these two compliance pathways

they will use. Alterations and additions with specified floor area (project aggregate area)

are required to comply with either of the two pathways listed above or with an existing

building reuse pathway.

SUGGESTION:

It is suggested to review information provided on the Carbon Leadership Forum website

https://carbonleadershipforum.org/resource-library/ as it contains a lot of educational

materials about WBLCA. Another source of educational materials may be the American

Institute of Architects (AIA) website https://www.aia.org/landing-pages/6456754-zero-

carbon.

BSC is coordinating with the Division of the State Architect (DSA) to make learning

content addressing carbon reduction regulations available through DSA’s Learning

Management System which is used for the purpose of educational webinars available to

the public. American Institute of Architects California (AIA-CA) is also working on the

training materials about all the compliance pathways available.

RECOMMENDATION:

Discuss and determine which one of the three compliance pathways to use during initial

project decision-making: by reusing existing building resources, demonstrating a

reduction in GWP through WBLCA or using products and materials with specified GWP

values. Discussion may include questions like how much to build, what to save, and

what materials to work with.

Note that compliance for projects which retain substantial portions of the existing

building structure can be very simple to document. For these building reuse projects

which comply based on percentage of building structure retained, an applicant can, if

they wish, use the alternative paths in Section 5.409.2 or Section 5.409.3.

For projects that retain portions of an existing building less than the 45 percent

threshold outlined in Section 5.109.2, the project must comply with either Section

5.409.2 or Section 5.409.3 to show conformance.

EXAMPLES:

Refer to examples provided under Section 5.105.1 Scope.

5.409.2 Whole building life cycle assessment. Projects shall conduct a cradle-to-

grave whole building life cycle assessment performed in accordance with ISO 14040

and ISO 14044, excluding operating energy, and demonstrating a minimum 10 percent

reduction in global warming potential (GWP) as compared to a reference baseline

building of similar size, function, complexity, type of construction, material specification,

and location that meets the requirements of the California Energy Code currently in

effect. Software used to conduct the whole building life cycle assessment, including

reference baseline building, shall have a data set compliant with ISO 14044, and ISO

21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978.

The software tools and datasets shall be the same for evaluation of both the baseline

building and the proposed building.

Notes:

1. Software for calculating whole building life cycle assessment is available

for free at Athena Sustainable Materials Institute

(https://calculatelca.com/software/impact-estimator/) and OneClick LCA -

Planetary (www.oneclicklca.com/planetary). Paid versions include, but are

not limited to, Sphera GaBi Solutions (gabi.sphera.com), SimaPro

(simapro.com), OneClick LCA (www.oneclicklca.com) and Tally for Revit

(apps.autodesk.com).

2. ASTM E2921-22 “Standard Practice for Minimum Criteria for Comparing

Whole Building Life Cycle Assessments for Use with Building Codes,

Standards, and Rating Systems” may be consulted for the assessment.

3. In addition to the required documentation specified in Section 5.409.2.3,

Worksheet WS-9 may be required by the enforcing entity to demonstrate

compliance with the requirements.

5.409.2.1 Building components. Building enclosure components included in the

assessment shall be limited to glazing assemblies, insulation, and exterior

finishes. Primary and secondary structural members included in the assessment

shall be limited to footings and foundations, and structural columns, beams,

walls, roofs, and floors.

5.409.2.2 Reference study period. The reference study period of the proposed

building shall be equal to the reference baseline building and shall be 60 years.

5.409.2.3 Verification of compliance. A summary of the GWP analysis

produced by the software and Worksheet WS-4 signed by the design

professional of record shall be provided in the construction documents as

documentation of compliance. A copy of the whole building life cycle assessment

which includes the GWP analysis produced by the software, in addition to

maintenance and training information, shall be included in the operation and

maintenance manual and shall be provided to the owner at the close of

construction. The enforcing agency may require inspection and inspection

reports in accordance with Sections 702.2 and 703.1 during and at completion of

construction to demonstrate substantial conformance. Inspection shall be

performed by the design professional of record or third party acceptable to the

enforcing agency.

INTENT:

The intent of these mandatory requirements is to reduce embodied carbon emissions

through a holistic, performance-based approach that allows teams to optimize through

design efficiency, alternative material selection, and procurement of low-carbon building

products. Whole building lifecycle assessment (WBLCA) is a modeling methodology

that allows architects and other building professionals to understand environmental

impacts associated with the following life cycle phases of the building: raw material

procurement, manufacturing, construction, use and decommissioning.

Using the WBLCA approach provides the project proponent with the maximum flexibility

as it is a performance-based approach, where a low performing aspect of the project

can be balanced or offset by a high performing aspect of the project. Because of the

increased flexibility of this approach, it can be more time consuming and/or costly to

implement than the other compliance pathways. As noted, the applicant determines

what compliance pathway to utilize. The approach used for compliance should be

clearly indicated in the construction documents, so verification during the plan review

and during field inspection can be implemented appropriately.

The plan reviewer does not prescriptively determine compliant strategies for WBLCA

pathway. In contrast, the applicant determines and models a set of design and

procurement strategies to comply with the mandatory performance criteria.

Section 5.409.2 contains mandatory regulations for the WBLCA compliance pathway.

This section requires a cradle-to-grave WBLCA be performed in accordance with ISO

14040 and ISO 14044 reference standards, excluding the operating energy, and

demonstrate a 10 percent reduction in global warming potential (GWP) compared to a

building similar in size, function, complexity, type of construction, material specification

and location. ISO 14040 establishes the framework and definitions for lifecycle

assessment. ISO 14044 describes key requirements and provides guidelines for

conducting LCA.

Clarification for mixed-use occupancies: In the case that a mixed-use project

contains non-residential floor area that is subject to this mandatory requirement, project

teams may choose to conduct WBLCA and demonstrate compliance for the whole

building floor area, including residential occupancies. However, project teams are only

required to perform the WBLCA for the non-residential areas and may choose to

demonstrate compliance through modeling only the non-residential portion of the

project.

Lifecycle scope boundaries: A critical scope definition for the cradle-to-grave LCA

boundary required under this regulation is to exclude operational energy use. Excluding

operational energy from the calculation eliminates teams’ ability to trade operational

energy savings for embodied carbon. Further, Part 6 (California Energy Code) of Title

24 addresses requirements for operational energy. It is also important to note that

Module D, beyond end-of-life, shall not be included in the WBLCA results.

Baseline model guidance: In order to demonstrate embodied carbon reductions in

compliance with this regulation, project teams must develop a baseline model, intended

to capture a comparable building design that has not be optimized. Section 5.409.2

provides guidance on acceptable assumptions for a baseline model for WBLCA. The

following information is being provided to clarify the intent of the baseline modeling

guidance.

1. Baseline models shall be project-specific; generic baseline WBLCA models or

assumptions cannot be used for the purposes of complying with this pathway.

2. Project teams may capture the embodied carbon reductions associated with

structural design optimizations from a conventional, baseline structural design for

a functionally equivalent project design. Examples of acceptable optimizations to

capture through WBLCA include:

a. Adjustments to structural grid spacing and dimensioning.

b. Reduction in steel rebar quantity through post-tensioning of slabs.

c. Reduction in foundation sizing as a result of lightweight structural systems.

3. Project teams shall not capture embodied carbon reductions associated with

standard structural design refinement that occur through conventional project

design development. For example, if a project team includes material

contingencies or increased material quantities during early-stage design,

standard refinement will conventionally occur during subsequent project design

phases and thus the over-designed scenario should not be assumed as a

baseline.

4. Project teams may capture the embodied carbon reductions associated with

alternative low-carbon material selection. Building materials assumed in the

baseline model should reflect conventional materials that would typically be used

for a functionally equivalent building in the project location. In most cases,

concrete, steel, or hybrid concrete/steel structures are assumed to be the

conventional, baseline structural typology. As such, wood structural members

may be considered as optimizations in the proposed design unless dimensional

lumber is the conventional construction type (e.g. a 5-over-2 podium building

where higher floors are conventionally built with dimensional lumber should not

use an all-concrete building as a baseline).

5. Building envelope assemblies in the baseline model shall meet the current

version of the California Energy Code. All insulation products included in baseline

shall be in compliance with California HFC regulations (e.g. avoiding the use of

legally prohibited insulation products cannot be claimed as an optimization).

6. Baseline models shall use regionally applicable industry-wide EPD benchmarks

for A1-A3 embodied carbon impacts. Optimizations resulting from specification

and procurement of low-carbon products may be captured if product-specific

EPDs documenting assumed values are collected during construction

administration.

7. Baseline models may use default assumptions provided in LCA software tools for

A4 and A5, as well as C1-C4 embodied carbon impacts.

Clarification on biogenic carbon storage: Biogenic carbon storage associated with

wood products shall be excluded or reported separately from embodied carbon

reductions, as seen in the WBLCA Worksheet WS-9.

Building components: Section 5.409.2.1 clarifies which building components are

included in the WBLCA. Model resolution shall be as high as possible within the

selected LCA software.

Study Period: Section 5.409.2.2 specifies that 60 years is the assumed building

lifespan and study period for the WBLCA assessment to fully account for maintenance

and replacement.

The intent is to ensure consistency with established LCA protocols, tools, resources and

metrics as US Green Building Council LEED references the same concepts, metrics

and approaches.

Note: The regulations do not ban the use of any materials. While the GWP

prescriptive pathway limits material choices to those that do not exceed the

maximum GWP value specified in Table 5.409.3, even those poor performing

materials could be used in a project under the WBLCA performance compliance

pathway as the analysis allows balancing poor GWP performing materials with high

GWP performing materials.

COMPLIANCE METHOD:

Follow standard process associated with performing WBLCA. In general, the process

can be broken down into following steps:

1. Collect information about materials and scenarios.

2. Perform calculations for impacts using reliable LCA assessment tools.

3. Understand and interpret results.

4. Document process and produce detailed assessment reports.

Ensure that the scope of the analysis is a cradle-to-grave assessment which includes

environmental impacts associated with the life-cycle stages for the building structure

and enclosure. The modules for a compliant WBLCA include:

• Product stage: Modules A1-A3

• Transportation to site: Module A4

• Construction installation: Module A5 (can be left blank if unknown)

• Use stage: B1-B5

• End of life stage: C1-C4

Identify which one of the three available pathways is used to comply with the embodied

carbon reduction requirements and include the following in the construction documents

to demonstrate 10 percent reduction in GWP:

• A summary of the GWP analysis produced by the software

• Worksheet WS-4 (added to CALGreen Chapter 8) signed by the design

professional of record

• Worksheet WS-9 (added to CALGreen Chapter 8) is optional unless required by

the enforcing agency

Include the following in the operation and maintenance manual provided to the owner at

the close of construction:

• A copy of the whole building life cycle assessment which includes the GWP

analysis produced by the software

The LCA software or tool used for the baseline and proposed design must be the same,

with the same modules evaluated. This is because different software tools have unique

databases and standard assumptions and can result in different results. Use of the

same tool for both baseline and proposed project ensures that the specifics of the

particular software or tool used are not key factors in the outcome. Available software

examples to perform cradle-to-grave WBLCA in accordance with ISO 14040 and

ISO 14044 reference standards are provided in the footnote 1 to Section 5.409.2. It is

expected that new tools may be developed, which can also be used provided they

conform to the ISO standards noted.

Note: The design professional of record would be responsible to ensure that the

software, data input, and the use of the tool are appropriate. The actual operation of

the software may be done by consultants who specialize in this type of analysis;

however, the design professional of record is still responsible for the resulting

compliance. The design professional who uses consultants to perform the analysis

should review the inputs and outputs to the software.

Including the GWP analysis in the project documents makes verification of compliance

simpler and allows building owners to review the environmental impacts of their project

material choices, leading to greater awareness of embodied carbon impacts throughout

the design and construction industry. Designers must include the product selection

considerations as identified from the WBLCA to ensure that the modeled products are

included in the final building.

EXAMPLES:

1. A 150,000 square foot office building – design example. The design team has

studied two structural scenarios during the schematic design stage:

A. Steel framing with concrete on metal deck

B. Steel framing with concrete topping over CLT deck

The analysis finds an embodied carbon reduction of 20 percent for the structural

system of Scenario B when compared to Scenario A. Industry average EPDs are

used for all materials. Biogenic carbon is not included in the embodied carbon

reduction. The owner decides to build Scenario B. Scenario A represents a

conventional or business-as-usual approach, and is therefore appropriate to use as

a baseline. Both scenarios are assumed to have the same facade with a contribution

of 15 percent to the overall embodied carbon. In total, the 20 percent reduction in the

structure contributes 17 percent overall reduction for the project and is found to be

compliant.

2. A 300,000 square foot mixed use concrete tower – procurement example.

During the construction documents stage, the design team has studied low-carbon

concrete procurement with the general contractor and local ready-mix supplier. The

baseline building and the design building are identical in their structural system,

enclosure system, and material quantities. The baseline building uses the NRMCA

regional benchmark concrete mixes in the WBLCA. The designed building uses low-

carbon concrete mixes specified in collaboration with the ready-mix supplier in the

WBLCA. GWP assumptions used in the baseline building model should be based on

industry wide EPDs. In the baseline WBLCA model, concrete is found to represent

70 percent of the overall GWP of the building. In collaboration with the contractor,

each mix design is optimized to the necessary structural and construction

performance criteria. A reduction of 15 percent in concrete GWP is established,

which reduces the overall building’s GWP by 10 percent. Implementation of these

designs is ensured by setting GWP limits that are noted in the project contract

documents. To document that the GWP of the concrete mixes actually supplied on

the project are equal to or less than the limits established in the WBLCA, the ready-

mix supplier is required by the contract documents to provide a mix specific EPDs in

their submittals.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that a summary of the GWP analysis

produced by the software and Worksheet WS-4 signed by the design professional of

record are included in the construction documents.

On-site enforcement: The enforcing agency may require inspection and inspection

reports in accordance with Sections 702.2 and 703.1 during and at completion of

construction to demonstrate substantial conformance. Inspection shall be performed by

the design professional of record or third party acceptable to the enforcing agency.

New code language: sections and table.

5.409.3 Product GWP compliance – prescriptive path. Each product that is

permanently installed and listed in Table 5.409.3 shall have a Type III environmental

product declaration (EPD), either product-specific or factory-specific.

5.409.3.1 Products shall not exceed the maximum GWP value specified in Table

5.409.3.

Exception: Concrete may be considered one product category to meet

compliance with this section. A weighted average of the maximum GWP for

all concrete mixes installed in the project shall be less than the weighted

average maximum GWP allowed per Table 5.409.3 using Exception Equation

5.409.3.1. Calculations shall be performed with consistent units of

measurement for the material quantity and the GWP value. For the purposes

of this exception, industry wide EPD’s are acceptable.

Exception EQUATION 5.409.3.1

GWP

< GWP

allowed

where

GWP

= Σ (GWP

)(v

) and GWP

allowed

= Σ (GWP

allowed

)(v

)

and

n = each concrete mix installed in the project

GWP

= the GWP for concrete mix n per concrete mix EPD, in kg CO

GWP

allowed

= the GWP potential allowed for concrete mix n per Table 5.409.3

= the volume of concrete mix n installed in the project, in m

5.409.3.2. Verification of compliance. Calculations to demonstrate compliance,

Type III EPDs for products required to comply if included in the project, and

Worksheet WS-5 signed by the design professional of record shall be provided

on the construction documents. Updated EPDs for products used in construction

shall be provided to the owner at the close of construction and to the

enforcement entity upon request. The enforcing agency may require inspection

and inspection reports in accordance with Sections 702.2 and 703.1 during and

at completion of construction to demonstrate substantial conformance. Inspection

shall be performed by the design professional of record or third party acceptable

to the enforcing agency.

TABLE 5.409.3

PRODUCT GWP LIMITS

Buy Clean California

Materials Product

Category

Maximum acceptable

GWP value

(unfabricated)

(GWP

allowed

)

Unit of Measurement

Hot-rolled structural

steel sections

1.77

MT CO

/MT

Hollow structural

sections

3.00

MT CO

/MT

Steel plate

2.61

MT CO

/MT

Concrete reinforcing

steel

1.56

MT CO

/MT

Flat glass

2.50

kg CO

/MT

Light-density mineral

wool board insulation

5.83

kg CO

/1 m

Heavy-density mineral

wool board insulation

14.28

kg CO

/1 m

Concrete, Ready-Mixed

2, 3

Concrete Product

Category

Maximum GWP

allowed value

(GWP

allowed

)

Unit of Measurement

up to 2499 psi

450

kg CO

2500-3499 psi

489

kg CO

3500-4499 psi

566

kg CO

4500-5499 psi

661

kg CO

5500-6499 psi

701

kg CO

6500 psi and greater

799

kg CO

Concrete, Lightweight Ready-Mixed

Concrete Product

Category

Maximum GWP

allowed value (GWP

allowed

)

Unit of Measurement

up to 2499 psi

875

kg CO

2500-3499 psi

956

kg CO

3500-4499 psi

1,039

kg CO

Footnotes:

1. The GWP values of the products listed in Table 5.409.3 are based on 175

percent of Buy Clean California Act (BCCA) GWP values, except for concrete

products which are not included in BCCA.

2. For concrete, 175 percent of the National Ready Mix Concrete Association

(NRMCA) 2022 version 3 Pacific Southwest regional benchmark values are

used for the GWP allowed, except for High Early strength.

3. Concrete High Early Strength ready-mixed shall be calculated at 130 percent

of the Ready mixed concrete GWP allowed values for each product category.

INTENT:

The intent of these mandatory requirements is to encourage the use of products and

materials for which life-cycle information is available (in the form of EPD) and that have

lower GWP impacts.

Section 5.409.3 contains mandatory regulations for the GWP compliance pathway (the

third pathway available to comply with the embodied carbon reduction regulations). This

pathway utilizes specific product categories and maximum acceptable GWP values

listed in Table 5.409.3 and provides project teams a prescriptive option to specify lower

carbon materials based on product purchasing and procurement during construction.

The materials required to comply are limited to structural steel, flat glass, mineral

wool board insulation and concrete (materials included in Table 5.409.3) and have

been based on a similar approach espoused by the Buy Clean California Act (BCCA)

except that concrete products are not included in BCCA. The maximum acceptable

GWP values specified in Table 5.409.3 represent 175 percent BCCA GWP values. The

concrete ready mixed and lightweight ready-mixed values are based on 175 percent of

the National Ready Mix Concrete Association (NRMCA) 2022 version 3 Pacific

Southwest regional benchmark values.

Note: High-early strength concrete is not included in the benchmark values, and it

should be calculated at 130 percent of the ready-mixed values in the table.

Note: Table 5.409.3 as printed contains a typo in the unit for flat glass. BSC intends

to correct the units during 2025 Intervening Code Adoption Cycle from kg CO2e/MT

to MT CO2e/MT. With the revised unit (MT CO2e/MT), reported GWP values will

align with industry data as published in the CLF North American Material Baselines

(2023).

Concrete, being a unique regional product, is allowed a weighted average calculation

for all concrete mixes used on a project as various regions in California may not be able

to comply with prescriptive maximum acceptable GWP values in Table 5.409.3.

Project teams can choose for each mix to comply with the GWP value in the table, or

they can use exception equation 5.409.3.1 to illustrate that, collectively, the concrete

mixes do not exceed the allowed GWP value. The weighted average approach also

allows more flexibility by allowing projects the ability to trade-off concrete mixes: high

performance/high GWP concrete can be offset with low GWP concrete (flatwork, for

example).

COMPLIANCE METHOD:

In general, the process can be broken down into following steps:

1. Find products with available Type III Environmental Product Declarations (EPD).

Note: EPD shall be either product-specific or factory-specific for all products

required to comply except for concrete, where industry wide EPDs are

acceptable.

2. Compare GWP listed in the EPD with the maximum GWP value specified in

Table 5.409.3.

3. Specify products that are compliant with the GWP values specified in the table.

Note: The embodied carbon reduction regulations do not supersede other

California Building Standards Code requirements, so the materials specified by

the project teams are required to meet all code requirements including structural

(Part 2 of Title 24) and energy efficiency (Part 6 of Title 24) performances.

4. Compile documentation that clearly indicates what materials have been

evaluated, what the allowable limits for those materials are, and what the values

are for the materials called out in the construction documents. Providing this road

map will assist in a verification during the plan check process.

5. Identify which one of the three available pathways is used to comply with the

embodied carbon reduction requirements and include the following in the

construction documents to demonstrate compliance:

• Calculations to demonstrate compliance (if Exception Equation 5.409.3.1 is

used)

• Type III EPDs for products required to comply if included in the project

• Worksheet WS-5 (see CALGreen Chapter 8) signed by the design

professional of record

6. Document that the products used in the project, as constructed, either match the

originally specified materials or have been evaluated and documented as

conforming to the requirements. This ‘on-site’ verification is the responsibility of

the design professional of record, who can enlist other project team members in

carrying out this verification, such as the general contractor, material suppliers, or

personal visual confirmation on the project site.

7. Provide updated EPDs for products used in construction to the owner at the

close of construction. The building official may require a third-party verification,

as outlined in CALGreen Section 703.

Space Intentionally Blank

EXAMPLES:

All the EPD snippets used in the examples below are from the Embodied Carbon in

Construction Calculator (EC3) Tool https://buildingtransparency.org/ec3/material-search

1. Hot-rolled structural steel sections.

Per EPD Table 5 above, GWP value for 1 metric ton of structural steel is

817 kg CO

e/MT.

Per CALGreen Table 5.409.3, Maximum acceptable GWP value for hot-rolled

structural steel sections is 1.77 MT CO

e/MT.

Convert Unit of Measurement used in the EPD to the one used in Table 5.409.3:

817 kg CO

e/MT / 1000 = 0.817 MT CO

e/MT

Compare GWP listed in the EPD with the maximum GWP value in Table 5.409.3:

0.817 MT CO

e/MT < 1.77 MT CO

e/MT

The product is compliant with the requirements of Section 5.409.3.1.

Space Intentionally Blank

2. Ready-Mixed Concrete, 4500-5499 psi.

Per EPD snipped above, GWP value for 1 cubic meter of the ready-mix concrete is

324.56 kg CO

e/m

Per Table 5.409.3, Maximum acceptable GWP value for ready-mixed concrete with

4500-5499 psi is 661 kg CO

e/m

Compare GWP listed in the EPD with the maximum GWP value in Table 5.409.3:

324.56 kg CO

e/m

< 661 kg CO

e/m

The product is compliant with the requirements of Section 5.409.3.1.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that calculations demonstrating

compliance, PDF copies or links to Type III EPDs for products required to comply if

used in the project, and Worksheet WS-5 signed by the design professional of record

are provided on the construction documents.

On-site enforcement: The enforcing agency may require inspection and inspection

reports in accordance with Sections 702.2 and 703.1 during and at completion of

construction to demonstrate substantial conformance. Inspection shall be performed by

the design professional of record or third party acceptable to the enforcing agency.

Note: Enforcement agency may request updated EPDs that were substituted after

the construction permit was issued.

Space Intentionally Blank

Section 5.410 – Begins on page 5-16 of CALGreen and on page 45 of the 2022

Guide.

SECTION 5.410

BUILDING MAINTENANCE AND OPERATION

…

Amended Informational Note

5.410.2 Commissioning. [N] New buildings 10,000 square feet and over. For new

buildings 10,000 square feet …

…

Informational Note:

1. Functional performance testing for heating, ventilation, air conditioning

systems and lighting controls must be performed in compliance with the

California Energy Code.

Change for 2022 Intervening Cycle Supplement: Informational Note 1 deleted and

Informational Note 2 renumbered to Note 1. This amendment was needed since

International Accreditation Service (IAS) no longer supports AC 476 and therefore the

deleted note is no longer applicable.

CHAPTER 6

REFERENCED ORGANIZATIONS AND STANDARDS

Chapter 6 – Begins on page 6-1 of CALGreen, and on page 77 of the 2022 Guide.

Change for 2022 Intervening Cycle Supplement: The second sentence in Section

601.1 is amended to correct the grammar. The amended table adds reference

standards referenced in the amended or new regulations.

SECTION 601

GENERAL

601.1 This chapter lists the organizations and standards that are referenced in various

sections of this document. The standards are listed according to the promulgating

agency of the standard.

Entire table is not shown. Only newly added reference standards are shown.

Referenced standards names are added here for ease of use.

ORGANIZATION STANDARD

REFERENCED

SECTION

ACI American Concrete Institute

American Concrete Institute

ACI CT-21 ACI Concrete Terminology

A5.405.5.2.1.1

ASTM ASTM International

ORGANIZATION STANDARD

REFERENCED

SECTION

…

ASTM C31/C31M-19 Standard

Practice for Making and Curing

Concrete Test Specimens in the Field

A5.405.5.3.4

…

ASTM C1798/C1798M-19 Standard

Specification for Returned Fresh

Concrete for Use in a New Batch of

Ready-Mixed Concrete

A5.405.5.3.5

…

ASTM C1866/C1866M-20 Standard

Specification for Ground-Glass

Pozzolan for Use in Concrete

A5.405.5.2

…

ASTM D7612-2021 Standard Practice

for Categorizing Wood and Wood-

Based Products According to Their

Fiber Sources

A5.405.2.1

…

ASTM E2921-2022 Standard Practice

for Minimum Criteria for Comparing

Whole Building Life Cycle

Assessments for Use with Building

Codes, Standards, and Rating

Systems

5.409.2, A5.409.2

EN European Standards

European and International standards

online store – European Standards (en-

standard.eu)

EN 15804-2012 + A2:2019

Sustainability of construction works.

Environmental product declarations.

Core rules for the product category of

construction products

5.409.2, A5.409.2.1,

A5.409.2.2

EN 15978-2011 Sustainability of

construction works – Assessment of

environmental performance of

buildings – Calculation method

5.409.2, A5.409.2.1,

A5.409.2.2

ISO International Organization

for Standardization

https://www.iso.org

ISO Central Secretariat

Chemin de Blandonnet 8

CP 401 – 1214 Vernier, Geneva,

Switzerland

ISO 14040-2006+A1:2020

Environmental management — Life

cycle assessment — Principles and

framework

5.409.2, A5.409.2.1,

A5.409.2.2

ORGANIZATION STANDARD

REFERENCED

SECTION

ISO 14044:2006+A1:2020

Environmental management — Life

cycle assessment — Requirements

and guidelines

5.409.2, A5.409.2.1,

A5.409.2.2

ISO 21930-2017 Sustainability in

buildings and civil engineering works

— Core rules for environmental

product declarations of construction

products and services

5.409.2, A5.409.2.1,

A5.409.2.2

ISO 21931-2017 Sustainability in

buildings and civil engineering works

— Framework for methods of

assessment of the environmental,

social and economic performance of

construction works as a basis for

sustainability assessment — Part 1:

Buildings

5.409.2, A5.409.2.1,

A5.409.2.2

CHAPTER 8

COMPLIANCE FORMS, WORKSHEETS

AND REFERENCE MATERIAL

Chapter 8 – Begins on page 8-1 of CALGreen Code and on page 83 of the 2022

Guide.

New Worksheets WS-3, WS-4, WS-5, WS-6, WS-7, WS-8 and WS-9 have been

added to Chapter 8.

Chapter 8 in CALGreen contains:

• Worksheets WS-1 and WS-2, sample forms for a Construction Waste

Management (CWM) Plan, CWM Worksheet and CWM Acknowledgment, and

commissioning referenced standards for non-energy systems and forms.

• Worksheets WS-3 through WS-9, forms to support verification of compliance for

carbon reduction regulations in CALGreen. Refer to regulations in 2022

CALGreen to see if it is mandatory to use the form for compliance.

This Guide provides additional CALGreen forms, worksheets and reference materials

for implementing nonresidential CALGreen measures. Use of these forms is not

mandatory for compliance with CALGreen. These forms serve as templates or guides

for code users and may be modified for your convenience. These forms can be used to

assist in implementing the CALGreen regulations. It is CBSC’s intent to maintain these

nonregulatory forms on its website.

Verification Guidelines Checklists are available in this guide within Appendix A5,

Nonresidential Voluntary Measures, Division A5.6, Verification Guidelines Checklists.

…

WORKSHEET (WS-3)

5.105.2 BUILDING REUSE

DOCUMENTATION OF COMPLIANCE OF EXISTING BUILDING REUSE

Area of Existing Building(s) _____ SF

Area of Aggregate Addition(s) (if applicable) _____ SF

Existing Total Area

(A)

Retained Total Area

(B)

% of Retained Structure

(B)/(A)

Primary Structural

Elements of Existing

Building(s)

(foundations; columns,

beams, walls, and floors;

and lateral elements)

_____ SF _____ SF _____ %

Building Enclosure of

Existing Building(s)

(roof framing, wall

framing and exterior

finishes only)

_____ SF _____ SF _____ %

Total % Reuse of Required Elements ≥ 45% _____ %

INTENT:

Worksheet WS-3 is added to Chapter 8 to support verification of compliance for Section

5.105.2 Reuse of existing building. Use of the worksheet is not mandatory. However,

use of the worksheet can help design professionals in showing compliance and assist

local jurisdictions with enforcement. The worksheet includes the area of the existing

building and area of aggregate addition if applicable to demonstrate the project is

eligible to comply with Section 5.105.2, and various options for calculating structural and

nonstructural elements to show a reuse of 45 percent minimum primary structural

elements and existing building enclosure.

Space Intentionally Blank

WORKSHEET (WS-4)

SECTION 5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT

Responsible Designer’s Declaration Statement:

I attest that the Whole Building Life Cycle Analysis has been performed according to the

requirements of Section 5.409.2 and has met the minimum 10 percent reduction in

global warming potential as compared to a reference baseline building of similar size,

function, complexity, type of construction, material specification, and location that meets

the requirements of the California Energy Code currently in effect. Furthermore, I will

ensure during construction that the material specifications will be reviewed for

substantial conformance with the life cycle assessment indicated on the approved plans

so at the close of construction the minimum 10 percent reduction in global warming

potential is thereby secured.

Signature:

Company:

Date:

Address:

License:

City/State/Zip:

Phone:

WORKSHEET (WS-5)

SECTION 5.409.3 PRODUCT GWP COMPLIANCE - PRESCRIPTIVE PATH

Responsible Designer’s Declaration Statement:

I attest that prescriptive compliance has been performed according to the requirements

of Section 5.409.3 and products have met the minimum 10 percent reduction in global

warming potential as specified in Table 5.409.3. Furthermore, I will ensure during

construction that the material specifications will be reviewed for substantial

conformance with the global warming potential limits indicated on the approved plans so

at the close of construction the minimum 10 percent reduction in global warming

potential is thereby secured.

Signature:

Company:

Date:

Address:

License:

City/State/Zip:

Phone:

INTENT:

Worksheets WS-4 and WS-5 are added to support verification of compliance for

Sections 5.409.2 Whole Building Life Cycle Assessment (WBLCA) and 5.409.3 Product

Global Warming Potential (GWP) pathways to comply with mandatory embodied carbon

reduction regulations. The worksheets are similar and require the design professional of

record to attest that the work has been performed in accordance with the code

requirements.

Note: Worksheet WS-5 as printed contains an inappropriate reference to a

“10 percent reduction in GWP.” BSC intends to delete this reference during the

2025 Intervening Code Adoption Cycle. The intent of the worksheet is to certify

compliance with the maximum GWP values listed in Table 5.409.3.

COMPLIANCE METHOD:

Include one of the signed worksheets in the construction documents pursuant to the

verification of appropriate compliance section.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the appropriate worksheet is

included in the construction documents and is signed by the design professional of

record.

On-site enforcement: The enforcing agency may require inspection and inspection

reports in accordance with Sections 702.2 and 703.1 during and at completion of

construction to demonstrate substantial conformance.

WORKSHEET (WS-6) [BSC-CG]

SECTION A5.105.2 BUILDING REUSE

TIER 1 AND TIER 2

DOCUMENTATION OF COMPLIANCE OF EXISTING BUILDING REUSE

Area of Existing Building _____ SF

Existing Total Area

(A)

Retained Total Area

(B)

% of Retained Structure

(B)/(A)

Primary Structural

Elements of Existing

Building

(foundations; columns,

beams, walls, and floors;

and lateral elements)

_____ SF _____ SF _____ %

Building Enclosure of

Existing Building

(roof framing, wall

framing and exterior

finishes only)

_____ SF _____ SF _____ %

Interior Nonstructural

Elements

(interior walls, doors,

floor coverings, ceiling

systems applicable for

voluntary Tier 2

compliance)

_____ SF _____ SF _____ %

Total % Reuse of Required Elements _____ %

INTENT:

Worksheet WS-6 is added to Chapter 8 to support verification of compliance for Section

A5.105.2 Reuse of existing building. Use of the worksheet is not mandatory; however, it

is provided to assist in showing compliance with these voluntary regulations. The

worksheet is useful in calculating specified minimum percentages of reused primary

structural elements, existing building enclosure elements and interior nonstructural

elements to demonstrate compliance as applicable in accordance with Sections

A5.105.2.1 for Tier 1, and A5.105.2.2 for Tier 2.

WORKSHEET (WS-7) [BSC-CG]

SECTION A5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT

Responsible Designer’s Declaration Statement:

I attest that the Whole Building Life Cycle Analysis has been performed according to the

requirements of Section A5.409.2 and has met the minimum 15 percent (Tier 1) or 20

percent (Tier 2) reduction in global warming potential as compared to a reference

baseline building of similar size, function, complexity, type of construction, material

specification, and location that meets the requirements of the California Energy Code

currently in effect. Furthermore, I will ensure during construction that the material

specifications will be reviewed for substantial conformance with the life cycle

assessment indicated on the approved plans so at the close of construction the

minimum reduction in global warming potential is thereby secured.

Signature:

Company:

Date:

Address:

License:

City/State/Zip:

Phone:

Space Intentionally Blank

WORKSHEET (WS-8) [BSC-CG]

SECTION A5.409.3 PRODUCT GWP COMPLIANCE-PRESCRIPTIVE PATH

Designer’s Declaration Statement:

I attest that prescriptive compliance has been performed according to the requirements

of Section A5.409.3 and products have met the maximum acceptable GWP value for

the products listed in Table A5.409.3 for either Tier 1 or Tier 2. Furthermore, I will

ensure during construction that any material specification substitution will be reviewed

for substantial conformance with the requirements of Section A5.409.3 so at the close of

construction the minimum 15 percent reduction in global warming potential is thereby

secured.

Signature:

Company:

Date:

Address:

License:

City/State/Zip:

Phone:

INTENT:

Worksheets WS-7 and WS-8 are added to support verification of compliance for

Sections A5.409.2 Whole Building Life Cycle Assessment (WBLCA) and A5.409.3

Product Global Warming Potential (GWP) pathways to comply with voluntary embodied

carbon reduction regulations. The worksheets are similar and require the design

professional of record to attest that the work has been performed in accordance with the

code requirements.

Note: Worksheet WS-8 as printed contains an inappropriate reference to a

“15 percent reduction in GWP.” BSC intends to delete this reference during the

2025 Intervening Code Adoption Cycle. The intent of the worksheet is to certify

compliance with the maximum GWP values listed in Table A5.409.3.

COMPLIANCE METHOD:

Include one of the signed worksheets in the construction documents pursuant to the

appropriate verification of compliance section.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the appropriate worksheet is

included in the construction documents and is signed by the design professional of

record.

On-site enforcement: The enforcing agency may require inspection and inspection

reports in accordance with Sections 702.2 and 703.1 during and at completion of

construction to demonstrate substantial conformance.

WORKSHEET (WS-9)

SECTION 5.409.2 AND SECTION A5.409.2

WHOLE BUILDING LIFE CYCLE ASSESSMENT

INTENT:

Worksheet WS-9 is added for optional use by the design professionals, and for required

use if invoked by the enforcement entity. Worksheet WS-9 has been developed to

create consistency in documentation submitted to the enforcing entity to ease the

review by their staff. If required by the enforcement entity, it shall be provided in addition

to the required summary of the GWP analysis and Worksheet WS-4 or Worksheet WS-7

signed by the design professional of record as applicable.

APPENDIX A5

NONRESIDENTIAL VOLUNTARY MEASURES

…

DIVISION A5.1-PLANNING AND DESIGN

…

SECTION A5.105

DECONSTRUCTION AND REUSE OF EXISTING STRUCTURES

Appendix A5.105 – Begins on page A5-2 of CALGreen and on page 154 of the

2022 Guide.

A5.105.1 Section deleted.

A5.105.1.1 Existing building structure. Section deleted.

A5.105.1.2 Existing nonstructural elements. Section deleted.

A5.105.1.3 Salvage. Section deleted.

New code language and section.

A5.105.1 Scope. Projects with the area limits specified shall comply with Section

A5.105.2 to achieve Tier 1 or Tier 2 compliance.

1. Alteration(s) to existing building(s) where the combined altered floor area is

50,000 square feet or greater shall comply with either Section A5.105.2, Section

A5.409.2, or Section A5.409.3.

2. Addition(s) to existing building(s) where the total floor area combined with the

existing building(s) is 50,000 square feet or greater shall comply with either

Section A5.105.2, Section A5.409.2, or Section A5.409.3

Exception: Combined addition(s) to existing building(s) of two times the

area or more of the existing building(s) is not eligible to meet compliance

with Section A5.105.2.

3. Alteration(s) to existing building(s) where the aggregate floor area is less than

50,000 square feet shall comply with either Section 5.105.2, Section 5.409.2 or

Section 5.409.3 for Tier 1 compliance, and either Section A5.105.2.1, Section

A5.409.2.1, or A5.409.3 Tier 1 requirements for Tier 2 compliance.

4. Addition(s) to an existing building where the total floor area combined with the

existing building(s) is less than 50,000 square feet shall comply with either

Section 5.105.2, Section 5.409.2 or Section 5.409.3 for Tier 1 compliance, and

either Section A5.105.2.1, Section A5.409.2.1, or A5.409.3 Tier 1 requirements

for Tier 2 compliance.

Exception: Combined addition(s) to existing building(s) of two times the

area or more of the existing building(s) is not eligible to meet compliance

with Section 5.105.2 or Section A5.105.2.

INTENT:

Existing Sections A5.105.1 – A5.105.1.3 included voluntary requirement to maintain

75 percent of the existing building structure and at least 50 percent of the interior

nonstructural elements. To align with the new mandatory requirements in Section

5.105.1 Scope, and Section 5.105.2 Reuse of existing building, the existing voluntary

sections have been repealed and rewritten to include the scope and requirements for

Tier 1 and Tier 2 Reuse of existing buildings.

Section A5.105.1 clarifies the Tier 1 and Tier 2 compliance paths for alterations and

additions to buildings with a floor area of 50,000 square feet or greater and buildings

with a floor area of 50,000 square feet or less. This section contains four different

options outlining the various compliance scenarios.

1. Alteration to existing building with a combined altered floor area of 50,000 square

feet or greater.

2. Additions to existing building where the total floor area combined with the existing

building is 50,000 square feet or greater. This scenario has an exception for

combined addition to existing building two times the area or more of the existing

building.

3. Alterations to existing building where the aggregate floor area is less than 50,000

square feet.

4. Additions to existing building where the total floor area combined with the existing

building is less than 50,000 square feet. This scenario also has an exception for

combined addition to existing building two times the area or more of the existing

building.

The intent is to not have a building area threshold for the voluntary tier’s applicability.

However, depending on the building area, the requirements are different.

Projects ≥ 50,000 square feet (more strict requirements to comply with):

• Tier 1 – Sections A5.105.2.1 (Tier 1 building reuse) or A5.409.2.1 (Tier 1

WBLCA) or A5.409.3 (GWP limits for Tier 1).

• Tier 2 – Sections A5.105.2.2 (Tier 2 building reuse) or A5.409.2.2 (Tier 2

WBLCA) or A5.409.3 (GWP limits for Tier 2).

Projects < 50,000 square feet (less strict requirements to comply with):

• Tier 1 – Sections 5.105.2 (mandatory requirements for building reuse) or 5.409.2

(mandatory requirements for WBLCA) or 5.409.3 (GWP limits in mandatory

requirements).

• Tier 2 – Sections A5.105.2.1 (Tier 1 building reuse) or A5.409.2.1 (Tier 1

WBLCA) or A5.409.3 (GWP limits for Tier 1).

EXAMPLES:

The concepts, descriptions and examples for the voluntary measures can be

extrapolated from the mandatory measures Section 5.105.1 Scope. Although the square

footage values used in the examples are different, the basic concepts and logic align.

A5.105.2 Reuse of existing building. Projects that include the reuse of an existing

building shall meet the minimum requirements of Section A5.105.2.

A5.105.2.1 Tier 1: An alteration or addition to an existing building shall maintain

at least 75 percent combined of the existing building’s primary structural

elements (foundations; columns, beams, walls, and floors; and lateral elements)

and existing building enclosure (roof framing, wall framing and exterior finishes).

Window assemblies, insulation, portions of buildings deemed structurally

unsound or hazardous, and hazardous materials that are remediated as part of

the project shall not be included in the calculation.

A5.105.2.2 Tier 2: An alteration or addition to an existing building shall maintain

at least 75 percent combined of the existing building’s primary structural

elements (foundations; columns, beams, walls, and floors; and lateral elements)

and existing building enclosure (roof framing, wall framing and exterior finishes).

In addition, an alteration to an existing building shall maintain 30% of existing

interior nonstructural elements (interior walls, doors, floor coverings, ceiling

systems). Window assemblies, insulation, portions of buildings deemed

structurally unsound or hazardous, and hazardous materials that are remediated

as part of the project shall not be included in the calculation.

A5.105.2.3 Verification of compliance. Documentation shall be provided in the

construction documents to demonstrate compliance with Section A5.105.2.

Note: Sample Worksheet WS-6 in Chapter 8 may be used to assist in

documenting compliance with this section.

A5.105.3 Deconstruction (Reserved)

INTENT:

Section A5.105.2 contains the specifics for the four options listed in the Scope section.

As with the mandatory section requirements, these regulations do not require reuse of

an existing building. But if this voluntary measure is used, and an addition or alteration

to an existing building occurs (i.e., the building is being reused), certain percentages of

specified building elements are required to be maintained.

Tier 1 requirements are similar to the requirements in the mandatory section, but

instead of 45 percent minimum, it requires at least 75 percent of the combined existing

building’s primary structural elements and existing building enclosure to be maintained.

In the Tier 2 requirements, in addition to Tier 1 requirements to maintain 75 percent of

the combined existing building’s primary structural elements and enclosure, Tier 2 also

requires maintaining 30 percent of the existing interior nonstructural elements.

COMPLIANCE METHOD:

Maintain the existing building primary structure (foundations, columns, beams, walls

(only those which contribute to structural stability of the building), floors (including floor

and roof decking) and enclosure (exterior skin and framing, excluding window

assemblies and insulation). Structurally unsound or hazardous portions of buildings, and

hazardous materials may be excluded, but clear and specific documentation should be

provided to use this exclusion.

Determine and identify on the construction documents the compliance tier and the

pathway used to comply with the embodied carbon reduction requirements. Identify

elements of the existing building that can be reused and determine the percentage of

existing elements that are retained. Provide calculations demonstrating a minimum

required percent of the existing building elements maintained as applicable. Show on a

demolition, site or building plan.

RECOMMENDATION:

For many projects, a simple area analysis will be sufficient to demonstrate that

percentages exceed the required percentages. For projects with significant alterations,

or in situations where the percentages are not clearly compliant without additional detail,

it will be necessary to prepare a spreadsheet listing all primary structural, interior

nonstructural and enclosure elements as applicable within the existing building prior to

construction or renovation.

An alternate method which allows even greater detail, when necessary, may use the

“projected areas” of individual building elements, evaluated in a spreadsheet so as to

show existing areas, and areas of the proposed final configuration. The percentage in

any of the above methods will be determined by dividing the square footage of the total

retained materials area by the square footage of the total existing materials area. The

building official can request additional detail in any case where the percentage area

being retained is not clear.

Note: The reuse calculations can be based on gross affected areas; or the surface

areas of building primary structural and enclosure elements with measurements

taken as if preparing a bid for construction of a building.

The design professional would indicate the method they are using to demonstrate

compliance, and fill out and include Worksheet WS-6, which is added to CALGreen

Chapter 8, in the construction documents to demonstrate compliance. Use of the

worksheet is not mandatory, as the compliance may be shown by other means.

However, use of the worksheet can help design professionals in showing compliance

and assist local jurisdictions with enforcement.

EXAMPLES:

The concepts, descriptions and examples for the voluntary measures can be

extrapolated from the mandatory measures. Refer to examples provided under the

mandatory measures for Section 5.105.2 Reuse of existing building. Although the

‘numbers’ are different, the basic concepts and logic align.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the pathway used to comply with

the preceding requirements for building reuse is identified on the construction

documents and should review the plans and calculations that show the required

percentages of the retained building elements. Use of the Worksheet WS-6 is not

mandatory, as the compliance may be shown by other means.

On-site enforcement: The inspector should review the permit set of plans and verify

on-site that the existing building elements are maintained as shown in the approved set

of construction documents.

SECTION A5.106

SITE DEVELOPMENT

…

Section A5.106.5.3 – Begins on page A5-3 of CALGreen and on page 160 of the

2022 Guide.

Amended code language.

A5.106.5.3 Electric vehicle (EV) charging. [N] Construction shall comply with Section

A5.106.5.3.1 Tier 1 or A5.106.5.3.3 Tier 2, and in accordance with regulations in the

California Building Code and the California Electrical Code.

A5.106.5.3.1 Tier 1. Comply with Section 5.106.5.3.1 EV capable spaces, Section

5.106.5.3.2 Electric vehicle charging stations and associated Table A5.106.5.3.1

Tier 1, or comply with Section A5.106.5.3.2 Electric vehicle charging stations

(EVCS)—Power allocation method and associated Table A5.106.5.3.2 Tier 1.

Refer to Section 5.106.5.3.2 for the permitted use of Level 2 or Direct Current Fast

Charger (DCFC) to create EVCS. Refer to Section 5.106.3.2.1 for the allowed use of

DCFC to comply with both EV capable spaces and Level 2 EVSE. Refer to Section

5.106.5.3.3 for the allowed use of Automatic Load Management System (ALMS).

TABLE A5.106.5.3.1 Tier 1

TOTAL NUMBER OF

ACTUAL PARKING

SPACES

TIER 1 NUMBER OF

REQUIRED EV

CAPABLE SPACES

TIER 1 NUMBER OF

EVCS (EV CAPABLE

SPACES PROVIDED

WITH EVSE)

2, 3

0-9

10-25

26-50

51-75

76-100

101-150

151-200

201 and over

30 percent of actual

parking spaces

33 percent of EV

capable spaces

1. Calculation for spaces shall be rounded up to the nearest whole number.

2. The number of required EVCS (EV capable spaces provided with EVSE)

in column 3 count toward the total number of required EV capable spaces

shown in column 2.

3. At least one Level 2 EVSE shall be provided.

A5.106.5.3.2 Electric vehicle charging stations (EVCS)—Power allocation

method. The power allocation method may be used as an alternative to the

requirements in Section 5.106.5.3.1, Section 5.106.5.3.2, and associated Table

A5.106.5.3.1 Tier 1.

Use Table A5.106.5.3.2 Tier 1 to determine the total power in kVA required based

on the total number of actual parking spaces. Power allocation method shall include

the following:

1. Use any kVA combination of EV capable spaces, low power Level 2, Level 2

or DCFC EVSEs.

2. At least one Level 2 EVSE shall be provided.

TABLE A5.106.5.3.2 Tier 1

TOTAL

NUMBER OF

ACTUAL

PARKING

SPACES

MINIMUM

TOTAL kVA

@ 6.6 kVA

TOTAL kVA REQUIRED

IN ANY COMBINATION OF EV

CAPABLE

3,4

, LOW POWER

LEVEL 2, LEVEL 2

1, 2

, OR DCFC

0-9

13.2

10-25

26-50

72.6

51-75

125.4

76-100

171.6

101-150

250.8

151-200

349.8

201 and over

30 percent of

actual parking

spaces x 6.6

Total required kVA = P x .30 x 6.6

Where P=Parking spaces in facility

1. Level 2 EVSE @ 6.6 kVA minimum.

2. At least one Level 2 EVSE shall be provided.

3. Maximum allowed kVA to be utilized for EV capable spaces is 67 percent.

4. If EV capable spaces are utilized, they shall meet the requirements of

Section 5.106.5.3.1 EV capable spaces.

A5.106.5.3.3 Tier 2. Comply with Section 5.106.5.3.1 EV capable spaces, Section

5.106.5.3.2 Electric vehicle charging stations and associated Table A5.106.5.3.3

Tier 2, or Section A5.106.5.3.4 Electric vehicle charging stations (EVCS)—Power

allocation method and associated Table A5.106.5.3.4 Tier 2.

Refer to Section 5.106.5.3.2 for the permitted use of Level 2 or Direct Current Fast

Charger (DCFC) to create EVCS. Refer to Section 5.106.3.2.1 for the allowed use of

DCFC to comply with both EV capable spaces and Level 2 EVSE. Refer to Section

5.106.5.3.3 for the allowed use of Automatic Load Management System (ALMS).

TABLE A5.106.5.3.3 Tier 2

TOTAL NUMBER OF

ACTUAL PARKING

SPACES

TIER 2 NUMBER OF

REQUIRED EV

CAPABLE SPACES

TIER 2 NUMBER OF

EVCS (EV CAPABLE

SPACES PROVIDED

WITH EVSE)

2, 3

0-9

10-25

26-50

51-75

76-100

101-150

151-200

201 and over

45 percent of actual

parking spaces

33 percent of EV

capable spaces

1. Calculation for spaces shall be rounded up to the nearest whole number.

2. The number of required EVCS (EV capable spaces provided with EVSE) in

column 3 count toward the total number of required EV capable spaces

shown in column 2.

3. At least one Level 2 EVSE shall be provided.

A5.106.5.3.4 Electric vehicle charging stations (EVCS)-Power allocation

method. The Power allocation method may be used as an alternative to the

requirements in Section 5.106.5.3.1, Section 5.106.5.3.2 and associated Table

A5.106.5.3.3 Tier 2. Use Table A5.106.5.3.4 Tier 2 to determine the total power in

kVA required based on the total number of actual parking spaces.

Power allocation method shall include the following:

1. Use any kVA combination of EV capable spaces, Low Power Level 2,

Level 2 or DCFC EVSEs.

2. At least one Level 2 EVSE shall be provided.

TABLE A5.106.5.3.4 Tier 2

TOTAL

NUMBER OF

ACTUAL

PARKING

SPACES

MINIMUM

TOTAL kVA @

6.6 kVA

TOTAL kVA REQUIRED IN ANY

COMBINATION OF EV

CAPABLE

3,4

, LOW POWER

LEVEL 2, LEVEL 2

1,2

, OR DCFC

0-9

28.8

10-25

76.8

26-50

163.2

51-75

268.8

76-100

384

101-150

547.2

151-200

758.4

201 and over

45 percent of

actual parking

spaces x 6.6

Total required kVA = P x .45 x P x 6.6

Where P=Parking spaces in facility

1. Level 2 EVSE @ 6.6 kVA minimum.

2. At least one Level 2 EVSE shall be provided.

3. Maximum allowed kVA to be utilized for EV capable spaces is 75 67

percent. *

4. If EV capable spaces are utilized, they shall meet the requirements of

Section 5.106.5.3.1 EV capable spaces.

* 67 percent is the correct value. 75 percent was published in error and will

be corrected via errata during the next code adoption cycle.

INTENT, SUGGESTIONS, COMPLIANCE METHODS,

RECOMMENDATIONS, ENFORCEMENT:

Refer to code Section 5.106.5.3.2 above for intent, suggestions, compliance methods,

recommendations, enforcement. The intent and compliance methods are the same as

mandatory with the only difference being increased values for the Tier 1 and Trier 2

tables for the EV capable parking space requirements or independently the increased

power allocation kVA values for Tier 1 and Tier 2 tables.

Note that there are various compliance options.

Section A5.106.11 – Begins on page A5-5 of CALGreen and on page 164 of the

2022 Guide.

Amended code language.

A5.106.11 Reduction of heat island effect. Reduce heat island by requiring Section

A5.106.11.1 Hardscape alternatives, Section A5.106.11.2 Cool roofs, or Section

A5.106.11.3 Shade trees.

A5.106.11.1 Hardscape alternatives. …

A5.106.11.2 Cool roof. Use roofing materials having a minimum aged solar

reflectance and thermal emittance complying with Sections A5.106.11.2.1 and

A5.106.11.2.2 or a minimum aged Solar Reflectance Index (SRI) complying with

Section A5.106.11.2.3 and as shown in Table A5.106.11.2.2 for Tier 1 or Table

A5.106.11.2.3 for Tier 2.

Exceptions:

…

A5.106.11.2.4 Verification of compliance. If no documentation is available,

an inspection shall be conducted to ensure roofing materials meet cool roof

aged solar reflectance and thermal emittance or SRI values.

New code language.

A5.106.11.3 Shade trees. [BSC-CG] In the absence of a local shade tree

ordinance, comply with mandatory Section 5.106.12 Shade trees.

INTENT:

This code section has been editorially amended to accommodate a new shade tree

voluntary regulation and to clarify the difference between several different heat island

effects.

A new voluntary measure for shade trees has been added in response to calls from a

few local jurisdictions asking if CALGreen can be amended to include shade tree

regulations that make use of the DSA mandatory regulations found in Section 5.106.12.

Many jurisdictions have local ordinances, municipal or zoning code regulations for

shade trees, but some do not, and they would benefit from the inclusion of these

regulations in CALGreen.

Shade tree planting has been a practical means for reducing heat island effect.

COMPLIANCE METHOD:

Indicate on the construction documents either one of the methods used to comply with

the shade tree requirement:

1. Comply with the local shade tree ordinance.

2. In the absence of the local shade tree ordinance, include on the site/landscape

plan location of the shade tree plantings, specify the container size and provide

calculations showing compliance with the percentage of shaded areas

requirement in the surface parking lots and landscape areas according to

Section 5.106.12.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that the construction documents show

container size and shaded area calculations for compliance with regulations in Section

5.106.12 or local shade trees provisions.

On-site enforcement: The inspector should verify that shade trees are planted as

shown in the construction documentation.

SECTION A5.107

BIRD-FRIENDLY BUILDING DESIGN

Section A5.107 – Begins on page A5-6 of CALGreen.

New code language.

A5.107 Bird-friendly building design.

A newly constructed building, or an alteration of an existing building that includes the

addition or replacement of 50 percent or more of the exterior glazing shall comply with

the bird-friendly building design elements and features in Sections A5.107.1 through

A5.107.3 the California Energy Code, and the fire hazard severity zone regulations in

Chapter 7A of the California Building Code.

Exception: Alteration to the glazing in historical buildings per the California

Historical Building Code.

A5.107.1 Required elevation treatment. Building elevation treatment shall

incorporate bird-friendly mitigation strategies. No less than 90 percent of a building

elevation, measured from grade to a height of 40 feet (12 m) above grade, or from

grade to the height of an adjacent mature tree canopy (whichever is greater), shall

incorporate bird-friendly mitigation strategies. No less than 60 percent of building

elevation, 40 feet (12 m) above grade to the top of the building elevation, shall

incorporate bird-friendly mitigation strategies.

Strategies to minimize the risk of birds colliding with buildings:

1. Glazing

Glazing with visual markers shall include, but is not limited to, the following:

a. Etched or fritted glass with patterns of elements on the exterior

having minimum dimensions of 1/4” (.64 cm) diameter for dots or 1/8”

(.32 cm) width for stripes in a density of 2 inches (5.1 cm) maximum

horizontally and vertically (the “2 X 2 Rule”).

Note: If the visual markers are on glass surface 2, they can be

effective if visible behind an exterior surface with reflectivity of 15% or

less.

b. Interior or exterior glazing film with 2 X 2 visual markers.

c. Laminated glass with 2 X 2 visual markers, patterned Ultraviolet (UV)

coating or use of contrasting patterned UV-absorbing and UV-

reflecting films.

Note: Low-e coatings shall be behind the visual markers

d. Glass block or channel glass.

e. Developed glazing technologies, documented to reduce bird strikes,

as tested by an independent third party and approved by the

authority having jurisdiction; or

2. Slats, Screens, Netting, Louvers

Glazing protected by exterior features that create a visible barrier in front of

the glazing, may include, but not be limited to:

a. Horizontal or vertical slats of 1/8” (.32 cm) minimum face width with

minimum 2” (5.1 cm) spacing that obscure 85% or more of glass

when viewed from all feasible angles.

b. Grilles, screens or 1/8” (.32 cm) dia. welded wire mesh with openings

no more than 2” (5.1 cm) maximum horizontally and vertically

installed parallel to and no more than 3 ¼ ft. (1 m) from the first

surface of glass (glass surface 1).

c. Netting with 1” (2.5 cm) maximum openings, installed taut at least 6”

(15 cm) away from the first surface of glass; or

d. Sunshades or louvers 9” (22.5 cm) deep vertically spaced a

maximum 9” (22.5 cm) or 6” (15 cm) deep horizontally at maximum 6”

(15 cm) spacing and parallel or angled to the glass surfaces.

A5.107.2 Special conditions. The following special conditions shall comply with the

provisions in Section A5.107.1 (as appropriate)

1. Glass facades adjacent to vegetated roof.

2. Glass railings and guardrails.

3. Transparent corners that extend 5.5 feet (1.68 m) on either side of a building.

4. Glass passageways less than 5.5 feet (1.68 m) wide.

5. Auxiliary glass building such as a glass pavilion or atria exposed to the sky.

6. Auxiliary glass building such as a glass pavilion or atria exposed to a

courtyard with a water feature or plants.

7. Stained glass windows insulated on the exterior with clear glazing.

A5.107.3 Nighttime conditions. Nighttime lighting at the top of the building, and in

the interiors of all areas visible through exterior glazing, including lobby and atria,

shall be controlled with time-switch control devices or occupancy sensors complying

with the current California Energy Code. The control device shall be programmed so

the lights are extinguished from 2 am to dawn.

Exception: Emergency lighting, lighting required for nighttime security and

aeronautical beacon lighting required by the Federal Aviation Administration.

A5.107.3.1 Systems or operation and maintenance manual. Include written

recommendations that lighting is extinguished pursuant to Section A5.107.3 and

janitorial services to the building are scheduled between sunrise and sunset.

INTENT:

The intent of this measure is to provide a uniform guideline for bird-friendly building

standards for the planning and design of buildings that specifically reduce the negative

impact of bird deaths caused by collisions with buildings.

This voluntary measure is intended to apply to newly constructed buildings and existing

buildings that includes the addition or replacement of 50 percent or more of the exterior

glazing, including structures such as, glass bridges, walkways, and outdoor railings,

free-standing glass architectural elements, and building corners where glass walls or

windows are perpendicular. These special conditions are dangerous because birds can

see through them to sky or habitat on the other side.

COMPLIANCE METHOD:

Use glass that have an image or pattern screened, printed, or applied to the glass

surface. By using patterns of various sizes and densities, manufacturers can create any

kind of image, translucent or opaque. Ceramic frit and acid-etched patterns are

commonly used to achieve design objectives other than preventing bird collisions,

including a reduction in the transmission of light and heat, privacy screening, or

branding, but these images in the glass also project enough visual markers to be

perceived by birds and to help them avoid collisions with the glass.

Use building-integrated structures, such as recessed windows, awnings, sunshades,

exterior screens, shutters, grilles, decorative facades that wrap entire structures, and

balconies or overhangs, which can help deter birds. Without completely obscuring

vision, these building-integrated structures can reduce the amount of visible glass,

obscure glass from view, mute reflections during certain times of the day, and provide

visual cues for birds to avoid an area. They can be used in retrofits or be an integral part

of an original design.

Consider the WUI parameters of the California Building Code for the fire hazard severity

zone and energy efficiency standards of the California Energy Code for fenestration

products used in the projects. Provide details and material specifications in the

construction documents.

Use time-switch control device or occupancy sensor from 2 a.m. to dawn to minimize

nighttime collisions by reducing illumination of buildings which creates a beacon effect

for night migrating birds. When weather conditions are favorable, these birds tend to fly

high (over 150 meters) and depend heavily on visual references to maintain their

orientation. However, during inclement weather, they often descend to lower altitudes

and are liable to be attracted to illuminated buildings or other tall, lighted structures.

ENFORCEMENT:

Plan review: The plan reviewer should examine the construction documents to confirm

compliance.

On-site enforcement: The inspector should review the permit set of plans and verify

on-site that the strategy measures are installed as shown in the approved set of

construction documents.

DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

SECTION A5.401

GENERAL

Division A5.4, Section 5.401 – Begins on page A5-17 of CALGreen.

Amended code language.

A5.401.1 Scope. The provisions of this chapter specify the requirements of achieving

enhanced compliance with material conservation, resource efficiency, and greenhouse

gas (GHG) emissions reduction through reuse of existing building stock and materials;

use of recycled, regional, rapidly renewable, and certified wood materials; and

employment of techniques to reduce pollution through recycling of materials.

Change for 2022 Intervening Cycle Supplement: Section has been amended to

include greenhouse gas (GHG) emission reduction and provide clarity.

SECTION A5.405

MATERIAL SOURCES

Section A5.405 – Begins on page A5-18 of CALGreen and on page 183 of the 2022

Guide.

…

New code language.

A5.405.2.1 Certified Wood Components – Sustainability. Provide wood products, for

at least 50 percent of the project permanently installed products, that have been

certified by independent third parties and labeled as having been produced in

compliance with the accepted principles of sustainable forest management. The use of

recycled and/or recovered wood products do not need to be certified. Comply with one

or more of the following certifications of wood sustainability:

1. Sustainable Forestry Initiative (SFI).

2. Forest Stewardship Council (FSC)

3. Program for the Endorsement of Forest Certification (PEFC).

4. American Forest Foundation’s American Tree Farm System® (ATFS).

5. Canadian Standards Association’s Sustainable Forest Management System

Standards (CSA Z809).

6. Manufacturer’s fiber procurement system that has been audited by an approved

agency as compliant with the provisions of ASTM D7612 as a responsible or

certified source.

…

INTENT:

The intent of this new regulation is to promote responsible and certified wood sourcing

which ensures that forests have been sustainably and responsibly managed and that

the wood fiber come from legal, responsible and non-controversial sources. Adding

these sustainable forestry wood standards will give local jurisdictions the ability to

exceed the CALGreen code minimum standards and provide options for owners and

builders to include certified wood building products in projects.

COMPLIANCE METHOD:

Identify in the construction documents certified wood components intended to be used

in the project amounting to at least 50 percent of the project’s permanently installed

wood products by volume or cost. Retain certification documentation accompanying

certified wood components for verification by the enforcing agency.

Documents may come in the form of bills of lading, labels, supplier declarations and

other documentation that the wood has been certified to standards that meet ASTM

D7612’s definition of responsible or certified sources. These include wood products

certified to the SFI Fiber Sourcing, SFI Certified Sourcing, FSC Controlled wood

standard or that originate from a certified forest as evidence by a certified content claim

from SFI Chain of Custody standard, PEFC Chain of Custody standard, the FSC Chain

of Custody standard, or through a manufacturer’s fiber procurement system that is

compliant with the provisions of ASTM D7612 as a responsible or certified source.

ENFORCEMENT:

Plan review: The plan reviewer should confirm that certified wood components are

specified, and the calculations of those component’s percentage are included in the

construction documents.

On-site enforcement: Verify, using documentation provided by the contractor, that at

least 50 percent of the project’s wood products meets the requirements of the certified

wood components requirements. The enforcing agency may require inspection and

inspection reports in accordance with Sections 702.2 and 703.1 during and at

completion of construction to demonstrate substantial conformance. Inspection shall be

performed by the design professional of record or third party acceptable to the enforcing

agency.

Amended code language.

A5.405.5 Cement and concrete. Cement and concrete made with recycled products

shall comply with A5.405.

A5.405.5.1 Cement. …

A5.405.5.2 Concrete. Use concrete manufactured with cementitious materials in

accordance with Section A5.405.2, as approved by the Engineer of Record.

A5.405.5.2.1 Supplementary cementitious materials (SCM). Use

concrete made with one or more supplementary cementitious materials

(SCM) conforming to the following standards:

1. Fly ash …

2. Slag cement …

3. Silica fume …

4. Natural pozzolan …

5. Blended supplementary cementitious materials conforming to

ASTM C1697, Standard Specification for Blended Supplementary

Cementitious Materials. The amount of each SCM in the blend will

be used separately in calculating Equation A5.4-1. Class C fly ash if

used in the blend, will be considered SL for the purposes of

satisfying the equation.

6. Ultra-fine fly ash …

7. Metakaolin …

8. Ground-Glass Pozzolan per ASTM C1866/C1866M.

9. Other materials with comparable or superior environmental benefits,

as approved by the Engineer of Record.

A5.405.5.2.1.1 Mix design equation. Use any combination …

Exception: Minimums in mix designs approved by the

Engineer of Record may be lower where high early strength

is needed for concrete products or to meet an accelerated

project schedule. High early strength shall be defined as

outlined in ACI CT.

F/25 + SL/50 + UF/12 ≥1 (Equation A5.4-14) where:

F = Fly ash, natural pozzolan or other approved SCM, or

blended SCM, as a percent of total cementitious material for

concrete on the project.

SL = GGBFS, as a percent of total cementitious material for

concrete on the project.

UF= Silica fume, metakaolin or UFFA, as a percent of total

cementitious material for concrete on the project.

INTENT:

Item 8 was added in Section A5.405.5.2.1 in response to requests from the concrete

industry. Extensive research has shown that several types of ground glass can perform

well as a pozzolanic material in concrete. This code section and Section A5.405.5.2.1.1

have also been editorially amended to provide more clarity to some of the requirements.

A5.405.5.3 Additional means of compliance. Section removed.

A5.405.5.3.1 Cement. Section removed.

A5.405.5.3.1.1 Alternative fuels. Section removed.

A5.405.5.3.1.2 Alternative power. Section removed.

Amended and renumbered code language

A5.405.5.3 Concrete manufacture. Formerly A5.405.5.3.2 Concrete. The following

measures shall be permitted in the manufacture of concrete, as approved by the

Engineer of Record.

A5.405.5.3.2.1 Alternative energy. Section removed.

A5.405.5.3.1 Recycled aggregates. Concrete made with one or more of

the following materials:

1. Blast furnace slag as a lightweight aggregate in unreinforced

concrete.

2. Recycled concrete aggregate (RCA) or crushed concrete

aggregate (CCA) that meets grading requirements of ASTM

C33, Standard Specification for Concrete Aggregates.

a. Recycled concrete aggregate (RCA) – created from

existing concrete structures, including building

foundations, parking areas, and sidewalks. It has been

processed to create a recycled concrete aggregate,

usable in many applications.

b. Crushed concrete aggregate (CCA) – created by taking

concrete that was batched but not used in initial

construction and is returned in the mixer truck to the

concrete batch plant. As a recent mix and unplaced it is a

clean product with known properties.

3. Other materials with comparable or superior environmental

benefits.

A5.405.5.3.2 Mixing water. …

A5.405.5.3.3 High strength concrete. Concrete elements designed to

reduce their total size compared to standard 3,000 psi concrete, thereby

reducing the total volume of cement, aggregate and water used on the

project.

INTENT:

Some of these code sections have been editorially amended and/or renumbered to

provide more clarity and accommodate new requirements added.

Sections A5.405.5.3 Additional means of compliance, A5.405.5.3.1 Cement,

A5.405.5.3.1.1 Alternative fuels, A5.406.5.3.1.2 Alternative power, and A5.405.5.3.2.1

Alternate energy have been removed since these requirements are not within the

control of the engineer of record or enforcing entity and do not affect concrete properties

for performance. Encouraged use of renewable energy sources in the manufacture of

materials is outside the regulatory scope of Title 24, thus the practice can be advocated

and endorsed by state policy or other regulatory state agencies.

Section A5.405.5.3.1 Recycled aggregates is renumbered from A5.405.5.3.2.2. Item 2

is amended to include aggregate or crushed concrete aggregate as suggested by the

Concrete Industry. Subsections a and b are added to Section item 2 to clarify the terms

recycled concrete aggregate (RCA) and crushed concrete aggregate (CCA), the two

main sources of recycled aggregate from concrete. Item 3 is amended to repeal the “as

approved by the engineer and enforcement authority” since additional means of

compliance is not within the control of the engineer of record or enforcing entity and

does not affect concrete properties for performance.

New code language.

A5.405.5.3.4 Later ages of maturity – An increase in the age of maturity

of testing for determining compressive strength for acceptance of concrete

from the current 28 days to 42 or 56 days, in compliance with ASTM

C31/C31M.

A5.405.5.3.5 Returned fresh concrete – The use of returned fresh

concrete in compliance with ASTM C1798/C1798M or Caltrans Section

90-9.

…

INTENT:

Section A5.405.5.3.4 Later ages of maturity is a new proposed voluntary section that

permits longer age of maturity for concrete as long as it is in compliance with ASTM C

31 and 39. The standard 28 days for age of maturity encourages more cement use. By

permitting longer ages of maturity, the amount of cement can be reduced while also

allowing for more options to increase the use of supplementary cementitious materials

(SCM), such as fly ash and natural pozzolans, in a mix and that can show improved

later performance for the concrete. Certain applications, such as foundations, may be

particularly applicable for longer maturity times since foundations will not experience the

full structural loads for long periods of time.

Section A5.405.5.3.5 Returned Fresh Concrete, is a new proposed voluntary section.

Often a concrete pour does not use all the concrete mix in a mixer truck, and that mix

can be incorporated into a new mix. Re-using returned fresh (also called plastic)

concrete is one of the best ways to conserve natural resources and reduce carbon

impacts. Re-using returned fresh concrete has the benefit of conserving the aggregates,

water, and cementitious materials used in the original mix. Accepted practices and use

of admixtures can extend the life of concrete and make it feasible to use the returned

fresh concrete.

SECTION A5.409

LIFE CYCLE ASSESSMENT

Section A5.409 – Begins on page A5-21 of CALGreen and on page 194 of the 2022

Guide.

A5.409.1 General. Deleted.

New life cycle assessment voluntary measures.

A5.409.1 Scope. Projects with the area limits specified shall comply with Section

A5.409.1 to achieve Tier 1 or Tier 2 compliance. Projects of any size shall comply with

A5.409.5 to achieve Tier 2 compliance.

1. Projects consisting of newly constructed building(s) with a combined floor area of

50,000 square feet or greater shall comply with either Section A5.409.2 or

Section A5.409.3.

2. Alteration(s) to existing building(s) where the combined altered floor area is

50,000 square feet or greater shall comply with either Section A5.105.2, Section

A5.409.2 or Section A5.409.3.

3. Addition(s) to existing building(s) where the total floor area combined with the

existing building(s) is 50,000 square feet or greater shall comply with either

Section A5.105.2, Section A5.409.2 or Section A5.409.3.

Exception: Combined addition(s) to existing building(s) of two times the

area or more of the existing building(s) is not eligible to meet compliance

with Section A5.105.2.

4. Projects consisting of newly constructed building(s) with a combined floor area of

less than 50,000 square feet shall comply with either Section 5.409.2 or Section

5.409.3 for Tier 1 compliance, and either Section A5.409.2.1 or A5.409.3 Tier 1

requirements for Tier 2 compliance.

5. Alteration(s) to existing building(s) where the aggregate floor area is less than

50,000 square feet shall comply with either Section 5.105.2, Section 5.409.2, or

Section 5.409.3 for Tier 1 compliance, and either Section A5.105.2.1, Section

A5.409.2.1, or Section A5.409.3 Tier 1 requirements for Tier 2 compliance.

6. Addition(s) to an existing building where the total floor area combined with the

existing building(s) is less than 50,000 square feet shall comply with either

Section 5.105.2, Section 5.409.2, or Section 5.409.3 for Tier 1 compliance, and

either Section A5.105.2.1, Section A5.409.2.1, or Section A5.409.3 Tier 1

requirements for Tier 2 compliance.

Exception: Combined addition(s) to existing building(s) of two times the

area or more of the existing building(s) is not eligible to meet compliance

with Section 5.105.2 or Section A5.105.2.

INTENT:

Existing voluntary requirements in Section A5.409.1 are replaced with new Tier 1 and

Tier 2 scoping provisions to align with the new mandatory requirements in Section

5.409.1 Scope. Section A5.409.1 with Items 1 through 4 is added to specify the Tier 1

and Tier 2 compliance pathways for new buildings, alterations and additions to existing

buildings based on the project size: 50,000 square feet or greater and 50,000 square

feet or less. This section contains six options to clarity the various scenarios.

1. New buildings with a combined floor area of 50,000 square feet or greater.

2. Alterations where the combined altered floor area is 50,000 square feet or

greater.

3. Additions where a combined floor area is 50,000 square feet or greater. This

scenario has an exception for combined addition to existing building two times

the area or more of the existing building.

4. New buildings with a combined floor area of less than 50,000 square feet.

5. Alterations where the aggregate floor area is less than 50,000 square feet.

6. Additions where a combined floor area is less than 50,000 square feet. This

scenario also has an exception for combined addition to existing building two

times the area or more of the existing building.

The intent is to not have a building area threshold for the voluntary tier’s applicability.

However, depending on the building area, the requirements are different.

Projects ≥ 50,000 square feet (more strict requirements to comply with):

• Tier 1 – Sections A5.105.2.1 (Tier 1 building reuse) or A5.409.2.1 (Tier 1

WBLCA) or A5.409.3 (GWP limits for Tier 1).

• Tier 2 – Sections A5.105.2.2 (Tier 2 building reuse) or A5.409.2.2 (Tier 2

WBLCA) or A5.409.3 (GWP limits for Tier 2).

Projects < 50,000 square feet (less strict requirements to comply with):

• Tier 1 – Sections 5.105.2 (mandatory requirements for building reuse) or 5.409.2

(mandatory requirements for WBLCA) or 5.409.3 (GWP limits in mandatory

requirements).

• Tier 2 – Sections A5.105.2.1 (Tier 1 building reuse) or A5.409.2.1 (Tier 1

WBLCA) or A5.409.3 (GWP limits for Tier 1).

EXAMPLES:

The concepts, descriptions and examples for the voluntary measures can be

extrapolated from the mandatory measures. Although the numbers are different, the

basic concepts and logic align.

A5.409.2 Whole building life cycle assessment. Amended and renumbered to

A5.409.4 (see below).

A5.409.2.1 Building components. Deleted.

A5.409.2.2 Impacts to be considered. Renumbered to A5.409.4.1 (see below).

INTENT:

The code sections have been repealed or amended and renumbered to align with new

voluntary and mandatory regulations.

A5.409.2 Whole building life cycle assessment. Projects shall meet the minimum

requirements of Section A5.409.2 for Tier 1 or Tier 2 compliance.

A5.409.2.1 Tier 1. Projects shall conduct a cradle-to-grave whole building life

cycle assessment meeting the requirements of Section 5.409.2 and performed in

accordance with ISO14040 and 14044, excluding operating energy,

demonstrating a minimum 15 percent reduction in global warming potential

(GWP) as compared to a reference baseline building of similar size, function,

complexity, type of construction, material specification, and location that meets

the requirements of all parts of the California Building Standards Code currently

in effect. Software used to conduct the whole building life cycle assessment,

including reference baseline building, shall have a data set compliant with ISO-

14044, and ISO 21930-2017 or EN 15804, and the software shall conform to ISO

21931 and/or EN 15978. The software tools and datasets shall be the same for

evaluation of both the baseline building and the proposed building.

Exception: For projects that include building reuse, the reference

baseline building shall exclude the reused elements. The percent

reduction in GWP shall be achieved through the design and construction

of new project elements.

A5.409.2.2 Tier 2. Projects shall conduct a cradle-to-grave whole building life

cycle assessment meeting the requirements of Section 5.409.2 and performed in

accordance with ISO14040 and ISO 14044, excluding operating energy,

demonstrating a minimum 20 percent reduction in GWP as compared to a

reference baseline building of similar size, function, complexity, type of

construction, material specification, and location that meets the requirements of

all parts of the California Building Standards Code currently in effect. Software

used to conduct the whole building life cycle assessment, including reference

baseline building, shall have a data set compliant with ISO-14044, and ISO

21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN

15978. The software tools and datasets shall be the same for evaluation of both

the baseline building and the proposed building.

Exception: For projects that include building reuse, the reference

baseline building shall not be of new construction and shall retain existing

materials. The percent reduction in GWP shall be achieved through the

design and construction of new project elements.

A5.409.2.3 Verification of compliance. A summary of the GWP analysis

produced by the software and Worksheet WS-7 signed by the design