Appendices B, D, E and Resource A — accessibility, appeals, emergency uses and fire ratings

Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:

• CEBC § 102.4 High relevance — show source text

  Chapter 14 is applicable to any building that is moved or relocated. This chapter is independent of any of the three compliance methods and focuses on the structural loads where the building is being relocated.

  Chapter 15 Construction Safeguards.

  Chapter 15 establishes specific regulations in order to minimize the risk to the public and adjacent property during construction. Additionally, this chapter addresses fire and life safety and means of egress during the construction process. This includes requirements for a site safety plan. This chapter is also consistent with Chapter 33 of the CBC and Chapter 33 of the California Fire Code (CFC).

  Chapter 16 Referenced Standards.

  Chapter 16 lists all of the product and installation standards and codes that are referenced throughout Chapters 1 through 15 and includes identification of the promulgators and the section numbers in which the standards and codes are referenced. As stated in Section 102.4, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code.

  Appendix A Guidelines for the Seismic Retrofit of Existing Buildings.

  Appendix A provides guidelines for upgrading the seismic resistance capacity of different types of existing buildings. It is organized into separate chapters which deal with buildings of different types, including unreinforced masonry buildings, reinforced concrete and reinforced masonry wall buildings, and lightframe wood buildings. This appendix includes its own referenced standards.

  Appendix B Supplementary Accessibility Requirements for Existing Buildings and Facilities.

  Chapters 11A and 11B of the CBC contain provisions that set forth requirements for accessibility to buildings and their associated sites and facilities for people with physical disabilities. Appendix B was added to address accessibility in construction for items that are not typically enforceable through the traditional building code enforcement process.

  Appendix C Guidelines for the Wind Retrofit of Existing Buildings.

  The purpose of Appendix C is to provide voluntary prescriptive alternatives for addressing the retrofit of buildings in high-wind areas. Currently, there are two chapters which deal with the retrofit of gable ends and the fastening of roof decks, Appendix Chapters C1 and C2, respectively. This appendix includes its own referenced standards.

  Appendix D Board of Appeals.

  Appendix D contains the provisions for appeal and the establishment of a board of appeals. The provisions include the application for an appeal, the makeup of the board of appeals and the conduct of the appeal process.

  Appendix E Temporary Emergency Uses.

  Appendix E is intended to provide guidance for designers, engineers, architects and fire and building officials on allowing temporary emergency uses of existing buildings with respect to the minimum code requirements. This appendix is a template or checklist that references the relevant code requirement of concerns.

  Resource A Guidelines on Fire Ratings of Archaic Materials and Assemblies.

  In the process of repair and alteration of existing buildings, based on the nature and the extent of the work, the CEBC might require certain upgrades in the fire-resistance rating of building elements, at which time it becomes critical for the designers and the code

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  officials to be able to determine the fire-resistance rating of the existing building elements as part of the overall evaluation for the assessment of the need for improvements. These guidelines are based upon the Guideline on Fire Ratings of Archaic Materials published by the National Institute of Building Sciences (NIBS).

  2025 CALIFORNIA EXISTING BUILDING CODE xv

• CEBC § 1.10.1 Medium relevance — show source text

  CHAPTER TOPICS	Col2
  CHAPTER	SUBJECTS
  1, 2	Administrative Requirements and Definitions
  3	Provisions for all Compliance Methods
  4	Repairs
  5	Prescriptive Compliance Method for Existing Buildings
  6–11	Work Area Compliance Method for Existing Buildings
  13	Performance Compliance Method for Existing Buildings
  14	Relocated Buildings
  15	Construction Safeguards
  16	Referenced Standards
  Appendix A	Guidelines for Seismic Retrofit of Existing Buildings
  Appendix B	Supplementary Accessibility Requirements for Existing Buildings
  Appendix C	Guidelines for Wind Retrofit of Existing Buildings
  Appendix D	Board of Appeals
  Appendix E	Temporary Emergency Uses
  Resource A	Guidelines on Fire Ratings of Archaic Materials and Assemblies

  CALIFORNIA BUILDING CODE CORRELATED TOPICS

  The CEBC requirements for construction safeguards are directly correlated to the requirements of the CBC. The following table shows chapters of the CBC that are correlated with the CEBC:

  CEBC/CBC CORRELATED TOPICS	Col2	Col3
  CEBC CHAPTER/SECTION	CBC CHAPTER/SECTION	SUBJECT
  Chapter 15	Chapter 33	Construction safeguards

  Chapter 1 Scope and Administration.

  Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

  Chapter 2 Definitions.

  Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

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  Chapter 3 Provisions for All Compliance Methods.

  Chapter 3 guides the use of the three compliance methods of the CEBC and provides requirements that apply globally. The globally applicable requirement include general requirements related to buildings materials and other applicable codes, storm shelters, structural loads, in-situ load tests, accessibility, smoke alarms, carbon monoxide detection and exterior wall coverings.

  Chapter 3A Provisions for All Compliance Methods.

  Chapter 3A controls the compliance options for alteration, repair, addition, evaluation and change of occupancy of existing structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).

  Chapter 4 Repairs.

  Chapter 4, a chapter independent of the three compliance methods, governs the repair of existing buildings. The provisions define conditions under which repairs may be made using materials and methods like those of the original construction or the extent to which repairs must comply with requirements for new buildings.

  Chapter 4A Repairs.

  Chapter 4A governs the repair of existing buildings regulated by the Department of Health Care Access and Information/Office of State- wide Hospital Planning and Development, which include hospitals and correctional treatment centers (applications listed in Sections 1.10.1 (OSHPD 1).

• CEBC § 1-3 Medium relevance — show source text

  Appendix C Guidelines for the Wind Retrofit of Existing Buildings.

  The purpose of Appendix C is to provide voluntary prescriptive alternatives for addressing the retrofit of buildings in high-wind areas. Currently, there are two chapters which deal with the retrofit of gable ends and the fastening of roof decks, Appendix Chapters C1 and C2, respectively. This appendix includes its own referenced standards.

  Appendix D Board of Appeals.

  Appendix D contains the provisions for appeal and the establishment of a board of appeals. The provisions include the application for an appeal, the makeup of the board of appeals and the conduct of the appeal process.

  Appendix E Temporary Emergency Uses.

  Appendix E is intended to provide guidance for designers, engineers, architects and fire and building officials on allowing temporary emergency uses of existing buildings with respect to the minimum code requirements. This appendix is a template or checklist that references the relevant code requirement of concerns.

  Resource A Guidelines on Fire Ratings of Archaic Materials and Assemblies.

  In the process of repair and alteration of existing buildings, based on the nature and the extent of the work, the CEBC might require certain upgrades in the fire-resistance rating of building elements, at which time it becomes critical for the designers and the code

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  officials to be able to determine the fire-resistance rating of the existing building elements as part of the overall evaluation for the assessment of the need for improvements. These guidelines are based upon the Guideline on Fire Ratings of Archaic Materials published by the National Institute of Building Sciences (NIBS).

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  CONTENTS

  CHAPTER 1 ADMINISTRATION . . . . . . . . . . . . . . . . . . . . . . . 1-3

  DIVISION I – CALIFORNIA ADMINISTRATION . . . . . . . . . . . . . . . . . . . 1-3

  1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

  1.2 Building Standards Commission. . . . . . . . . . . . . . . . . . . 1-5

  1.3 Board of State and Community Corrections. . . . . . . . . 1-7

  1.4 Department of Consumer Affairs. . . . . . . . . . . . . . . . . . . 1-7

  1.5 California Energy Commission. . . . . . . . . . . . . . . . . . . . . 1-7

  1.6 Department of Food and Agriculture . . . . . . . . . . . . . . . 1-7

  1.7 Department of Public Health . . . . . . . . . . . . . . . . . . . . . . 1-7

• California Existing Building Code Medium relevance — show source text

  C301 Referenced Standards . . . . . . . . . . . . . . . APPENDIX C-31

  APPENDIX D BOARD OF APPEALS . . . . . . . . . . . APPENDIX D-3

  D101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX D-3

  APPENDIX E TEMPORARY EMERGENCY

  USES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E103 Submittal Documents . . . . . . . . . . . . . . . . APPENDIX E-3

  E104 Conformance . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E105 Permits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E106 General Standards for

  Emergency Uses. . . . . . . . . . . . . . . . . . . . APPENDIX E-3

  E107 Use of Specific Standards . . . . . . . . . . . . . APPENDIX E-4

  E108 Referenced Standards . . . . . . . . . . . . . . . . APPENDIX E-5

  RESOURCE A GUIDELINES ON FIRE RATINGS OF

  ARCHAIC MATERIALS AND ASSEMBLIES. . . . RESOURCE A-3

  Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RESOURCE A-3

  Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RESOURCE A-3

  1—Fire-Related Performance of Archaic Materials and

  Assemblies . . . . . . . . . . . . . . . . . . . . . . . .RESOURCE A-4

  2—Building Evaluation . . . . . . . . . . . . . . . . . . . . . .RESOURCE A-5

  3—Final Evaluation and Design Solution . . . . . .RESOURCE A-8

  4—Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RESOURCE A-14

  APPENDIX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RESOURCE A-17

  Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RESOURCE A-17

  Table of Contents. . . . . . . . . . . . . . . . . . . . . . . . . RESOURCE A-17

• CEBC § 4.2.2 Medium relevance — show source text

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 4.2.2 STEEL BEAMS—CONCRETE PROTECTION DEPTH 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	LOAD	TIME	PRE- BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  B-SC-1	10″	10″ × 8″ rectangle; aggregate concrete (4170 psi) with 1″ top cover and 2″ bottom cover; No. 13 SWG iron wire loosely wrapped at approximately 6″ pitch about 7″ × 4″ × 16 lbs “I” beam.	3.9 tons	3 hrs 46 min			7	1–3	33/4
  B-SC-2	10″	10″ × 8″ rectangle; aggregate concrete (3630 psi) with 1″ top cover and 2″ bottom cover; No. 13 SWG iron wire loosely wrapped at approximately 6″ pitch about 7″ × 4″ × 16 lbs “I” beam.	5.5 tons	5 hrs 26 min			7	1, 4–7	33/4

  For SI: 1 inch = 25.4 mm, 1 pound = 0.004448 kN, 1 pound per square inch = 0.00689 MPa, 1 ton = 8.896 kN.

  Notes:

  1. Load concentrated at mid-span.
  2. Specimen 10-foot 3-inch clear span simply supported.
  3. Passed Grade “C” fire resistance (British), including hose stream and reload.
  4. Specimen 11-foot clear span—restrained.
  5. Passed Grade “B” fire resistance (British), including hose stream and reload.
  6. See Table 4.1.3, Note 5.
  7. Hourly rating based upon B-SC-1.

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  SECTION V—DOORS

  FIGURE 5.1

  RESISTANCE OF DOORS TO FIRE EXPOSURE

  NUMBER OF ASSEMBLIES

  10

  5

  0

  |Col1|The number in each box is
  keyed to the last number in the
  Item Code column in the Table.

• CEBC § 2.1.2 Medium relevance — show source text

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.2—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  C-10-RC-3	10″	10″ square columns; aggregate concrete (5370 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.5 tons	2 hrs			7	2, 3, 11	2
  C-10-RC-4	10″	10″ square columns; aggregate concrete (5206 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.5 tons	2 hrs			7	2, 7	2
  C-10-RC-5	10″	10″ square columns; aggregate concrete (5674 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.7 tons	2 hrs			7	1	2
  C-10-RC-6	10″	10″ square columns; aggregate concrete (5150 psi); reinforcement: vertical, four 11/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	66 tons	1 hr 43 min			7	1	13/4
  C-10-RC-7	10″	10″ square columns; aggregate concrete (5580 psi); reinforcement: vertical, four 1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 11/8″.	62.5 tons	1 hr 38 min			7	1	11/2
  C-10-RC-8	10″	10″ square columns; aggregate concrete (4080 psi); reinforcement: vertical, four 11/8″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 11/8″.	72.

• CEBC § 4.3 Medium relevance — show source text

  The “thickness design” concept is essentially a special case of Harmathy’s Rules (specifically Rules 1 and 2). It should be recognized that the only source of data is the Appendix tables. If other data are used, it must be in connection with the approach below.

  4.3 The fire resistance of building elements can be established by applying Harmathy’s Ten Rules of Fire Resistance Ratings as set forth in Section 3.2 of the guideline. This is subject to the following limitations:

  The data from the tables can be utilized subject to the limitations in Section 4.2.

  Test reports from recognized journals or published papers can be used to support data utilized in applying Harmathy’s Rules.

  Calculations utilizing recognized and well established computational techniques can be used in applying Harmathy’s Rules. These include, but are not limited to, analysis of heat flow, mechanical properties, deflections and load bearing capacity.

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  APPENDIX

  INTRODUCTION

  The fire-resistance tables that follow are a part of Resource A and provide a tabular form of assigning fire-resistance ratings to various archaic building elements and assemblies.

  These tables for archaic materials and assemblies do for archaic materials what Tables 721.1(1) through 721.1(3) of the California Building Code [®] do for more modern building elements and assemblies. The fire-resistance tables of Resource A should be used as described in the “Purpose and Procedure” that follows the table of contents for these tables.

  TABLE OF CONTENTS

  Purpose and Procedure RESOURCE A-19

  Section I—Walls

  1.1.1 Masonry 0 in. to less than 4 in. thick RESOURCE A-20

  1.1.2 Masonry 4 in. to less than 6 in. thick RESOURCE A-23

  1.1.3 Masonry 6 in. to less than 8 in. thick RESOURCE A-29

  1.1.4 Masonry 8 in. to less than 10 in. thick RESOURCE A-33

  1.1.5 Masonry 10 in. to less than 12 in. thick RESOURCE A-40

  1.1.6 Masonry 12 in. to less than 14 in. thick RESOURCE A-43

  1.1.7 Masonry 14 in. or more thick RESOURCE A-48

  1.2.1 Metal Frame 0 in. to less than 4 in. thick RESOURCE A-51

  1.2.2 Metal Frame 4 in. to less than 6 in. thick RESOURCE A-54

  1.2.3 Metal Frame 6 in. to less than 8 in. thick RESOURCE A-55

  1.2.4 Metal Frame 8 in. to less than 10 in. thick RESOURCE A-56

  1.3.1 Wood Frame 0 in. to less than 4 in. thick RESOURCE A-56

  1.3.2 Wood Frame 4 in. to less than 6 in. thick RESOURCE A-57

  1.3.3 Wood Frame 6 in. to less than 8 in. thick RESOURCE A-63

  1.4.1 Miscellaneous Materials 0 in. to less than 4 in. thick RESOURCE A-64

• CBC § 301 Medium relevance — show source text

  This code provides three main options for a designer in dealing with alterations of existing buildings. These are laid out in Section 301 of this code:

  Option 1: Work for alteration, change of occupancy or addition of all existing buildings shall be done in accordance with the Prescriptive Compliance Method given in Chapter 5. It should be noted that this method originates from the former Chapter 34 of the IBC (2012 and earlier editions).

  Option 2: Work for alteration, change of occupancy or addition of all existing buildings shall be done in accordance with the Work Area Compliance Method given in Chapters 6 through 12.

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  Option 3: Work for alteration, change of occupancy or addition of all existing buildings shall be done in accordance with the Performance Compliance Method given in Chapter 13. It should be noted that this option was also provided in the former Chapter 34 of the IBC (2012 and earlier editions).

  Under limited circumstances, a building alteration can be made to comply with the laws under which the building was originally built, as long as the accessibility requirements are met, there has been no substantial structural damage and there will be limited structural alteration. Flood hazard provisions also must still be addressed where there is a substantial improvement.

  Note that all repairs must comply with Chapter 4 and all relocated buildings are addressed by Chapter 14.

  ARRANGEMENT AND FORMAT OF THE 2025 CEBC

  The format of the CEBC allows each chapter to be devoted to a particular subject. The following table shows how the CEBC is divided. The subsequent table shows CEBC requirements that are correlated with other California Codes. The chapter synopses detail the scope and intent of the provisions of the CEBC.

  CHAPTER TOPICS	Col2
  CHAPTER	SUBJECTS
  1, 2	Administrative Requirements and Definitions
  3	Provisions for all Compliance Methods
  4	Repairs
  5	Prescriptive Compliance Method for Existing Buildings
  6–11	Work Area Compliance Method for Existing Buildings
  13	Performance Compliance Method for Existing Buildings
  14	Relocated Buildings
  15	Construction Safeguards
  16	Referenced Standards
  Appendix A	Guidelines for Seismic Retrofit of Existing Buildings
  Appendix B	Supplementary Accessibility Requirements for Existing Buildings
  Appendix C	Guidelines for Wind Retrofit of Existing Buildings
  Appendix D	Board of Appeals
  Appendix E	Temporary Emergency Uses
  Resource A	Guidelines on Fire Ratings of Archaic Materials and Assemblies

  CALIFORNIA BUILDING CODE CORRELATED TOPICS

  The CEBC requirements for construction safeguards are directly correlated to the requirements of the CBC. The following table shows chapters of the CBC that are correlated with the CEBC:

  CEBC/CBC CORRELATED TOPICS	Col2	Col3
  CEBC CHAPTER/SECTION	CBC CHAPTER/SECTION	SUBJECT
  Chapter 15	Chapter 33	Construction safeguards

  Chapter 1 Scope and Administration.

  Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

  Chapter 2 Definitions.

• CEBC § 3.1 Medium relevance — show source text

  13′1″ span
  restrained.|150
  psf|4 hrs|||7|1, 7|4|

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 3.1—continued FLOOR/CEILING ASSEMBLIES—REINFORCED CONCRETE	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	ASSEMBLY THICKNESS	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	ASSEMBLY THICKNESS	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST-BMS-92	POST-BMS-92	POST-BMS-92
  F/C-6-RC-29	6″	6″ thick (4180 psi) concrete deck; 4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S. with 1″ cover on both top and bottom flanges; 13′1″ span restrained.	160 psf	3 hrs 48 min			7	1, 10	33/4
  F/C-6-RC-30	6″	6″ thick (3720 psi) concrete deck; 4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S. with 1″ cover on both top and bottom flanges; 12′ span simply supported.	115 psf	29 min			7	1, 5, 13	1/4
  F/C-6-RC-31	6″	6″ deep (3450 psi) concrete deck; 4″ × 13/4″ × 5 lbs R.S.J.; 2′6″ C.R.S. with 1″ cover on both top and bottom flanges; 12′ span simply supported.	25 psf	3 hrs 35 min			7	1, 2	31/2
  F/C-6-RC-32	6″	6″ deep (4460 psi) concrete deck; 4″ × 13/4″ × 5 lbs R.S.J.; 2′ C.R.S. with 1″ cover on both top and bottom flanges; 12′ span simply supported.	60 psf	4 hrs 30 min			7	1, 10	41/2
  F/C-6-RC-33	6″	6″ deep (4360 psi) concrete deck; 4″ × 13/4″ × 5 lbs R.S.J.; 2′ C.R.S.

• CEBC § 4.1.3 Medium relevance — show source text

  Col1	Col2
  81~~/ "~~	81~~/ "~~

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 4.1.3 REINFORCED CONCRETE BEAMS DEPTH 14″ TO LESS THAN 16″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST-BMS-92	POST-BMS-92	POST-BMS-92
  B-15-RC-1	15″	Concrete flange: 4″ deep × 2' wide (3290 psi) concrete; concrete beam: 10″ deep × 81/2″ wide; “I” beam reinforcement: 10″ × 41/2″ × 25 lbs R.S.J.; 4″ cover on bottom flange; 1″ cover on top flange; flange reinforcement:3/8″ diam- eter bars at 6″ pitch parallel to “T”;1/4″ diameter bars perpendicular to “T”; beam reinforcement: 4″ × 6″ No. 13 SWG wire mesh; span: 11′ restrained.	10 tons	6 hrs			7	1–3, 5, 6	4
  B-15-RC-2	15″	Concrete flange: 4″ deep × 2' wide (4820 psi) concrete; concrete beam: 10″ deep × 81/2″ wide; “I” beam reinforcement: 10″ × 41/2″ × 25 lbs R.S.J.; 1″ cover over wire mesh on bottom flange; 1″ cover on top flange; flange rein- forcement:3/8″ diameter bars at 6″ pitch parallel to “T”;1/4″ diameter bars perpendicu- lar to “T”; beam reinforcement: 4″ × 6″ No. 13 SWG wire mesh; span: 11′ restrained.	10 tons	6 hrs			7	1, 2, 4–6	4

  For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound = 0.004448 kN, 1 pound per square inch = 0.00689 MPa, 1 ton = 8.896 kN.

  Notes:

  1. Load concentrated at mid-span.
  2. Achieved 6-hour fire rating (Grade “A,” British).
• CEBC § 2.1.5 Medium relevance — show source text

  **
  HOURS| |ITEM
  CODE|MINIMUM
  DIMENSION|CONSTRUCTION DETAILS|LOAD|TIME|PRE-BMS-92|BMS-92|POST-BMS-92|POST-BMS-92|POST-BMS-92| |C-16-RC-1|16″|16″ square columns; gravel aggregate concrete
  (4550 psi); reinforcement: vertical, eight 13/8″
  rebars; horizontal,5/16″ ties at 6″ pitch 13/8″
  below column surface and5/16″ ties at 6″ pitch
  linking center rebars of each face forming a
  smaller square in column cross section.|237
  tons|1 hr|||7|1–3|1|

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.5—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 16″ TO LESS THAN 18″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM DIMENSION	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM DIMENSION	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST-BMS-92	POST-BMS-92	POST-BMS-92
  C-16-RC-2	16″	16″ square columns; gravel aggregate concrete (3360 psi); reinforcement: vertical, eight 13/8″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 13/8″.	210 tons	2 hrs			7	2, 4–6	2
  C-16-RC-3	16″	16″ square columns; gravel aggregate concrete (3980 psi); reinforcement: vertical, four7/8″ rebars; horizontal,3/8″ ties at 6″ pitch; cover: 1″.	123.5 tons	2 hrs			7	2, 4, 7	2
  C-16-RC-4	16″	Reinforced concrete columns with 11/2″ concrete outside reinforcing steel; gross diam- eter or side of column: 16″; Group I, Column A.	—	9 hrs		1		8, 9	9
  C-16-RC-5	16″	Description as per C-16-RC-4; Group I, Column B.	—	6 hrs		1		8,

• CEBC § 25.4 Medium relevance — show source text

  |See
  Note 16|45 min|||43|16|3/4| |F/C-4-RC-45|4″|2500 psi concrete;5/8″ cover; fully
  restrained at test.|See
  Note 16|40 min|||43|16|2/3| |F/C-4-RC-46|4″|2000 psi concrete;3/4″ cover; free or
  partial restraint at test.|See
  Note 16|1 hr
  15 min|||43|16|11/4| |F/C-5-RC-47|5″|2500 psi concrete;3/4″ cover; fully
  restrained at test.|See
  Note 16|1 hr|||43|16|1| |F/C-5-RC-48|5″|2000 psi concrete;3/4″ cover; free or
  partial restraint at test.|See
  Note 16|1 hr
  30 min|||43|16|11/2| |F/C-6-RC-49|6″|2500 psi concrete; 1″ cover; fully
  restrained at test.|See
  Note 16|1 hr
  30 min|||43|16|11/2| |F/C-6-RC-50|6″|2000 psi concrete; 1″ cover; free or partial
  restraint at test.|See
  Note 16|2 hrs|||43|16|2|

  For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound per square inch = 0.00689 MPa, 1 pound per square foot = 47.9 N/m [2] .

  Notes:

  1. British test.

  2. Failure mode—local back face temperature rise.

  3. Tested for Grade “C” (2-hour) fire resistance

  4. Collapse imminent following hose stream.

  5. Failure mode—flame thru.

  6. Void formed with explosive force and report.

  7. Achieved Grade “B” (4-hour) fire resistance (British).

  8. Failure mode—collapse.

  9. Test was run to 2 hours, but specimen was partially supported by the furnace at 1 [1] / 4 hours.

  10. Failure mode—average back face temperature.

  11. Recommended endurance for non-load-bearing performance only.

  12. Floor maintained load-bearing ability to 2 hours at which point test was terminated.

  13. Test was run to 3 hours at which time failure mode 2 (above) was reached in spite of crack formation at 29 minutes.

  14. Tested for Grade “A” (6-hour) fire resistance.

  16. Load unspecified.
  17. Total assembly thickness 5 [1] / 2 inches. Three-inch thick blocks of molded excelsior bonded with Portland cement used as inserts with 2 [1] / 2 -inch cover (concrete) above blocks and 3 / 4 -inch gypsum plaster below. Nine-inch-wide ribs containing reinforcing steel of unspecified size interrupted 20-inch-wide segments of slab composite (i.e., plaster, excelsior blocks, concrete cover).

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-95

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  FIGURE 3.2 FLOOR/CEILING ASSEMBLIES—STEEL STRUCTURAL ELEMENTS

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