MASS TIMBER BUILDINGS AND THE IBC

MASS TIMBER

BUILDINGS

AND THE IBC

?

AMERICAN

WOOD

COUNCIL

19-17758_PROD_Mass_Timber_Buildings_TitlePg_FINAL1.indd 1

5/18/20 9:30 AM

MASS TIMBER BUILDINGS AND

THE IBC?

2021 EDITION

International Code Council

ICC Staff:

Executive Vice President and Director of

Business Development:

Mark A. Johnson

ISBN: 978-1-952468-02-5

Project Head:

John ¡°Buddy¡± Showalter, P.E.

Publications Manager:

Anne F. Kerr

Project Editor:

Phil Arvia

Production Technician:

Sue Brockman

Cover Design:

Ricky Razo

Senior Vice President, Business and Product

Development:

Hamid Naderi

Vice President and Technical Director,

Products and Services:

Doug Thornburg

Vice President, Publishing and Multimedia:

Margi Leddin

Senior Marketing Specialist:

Dianna Hallmark

COPYRIGHT ? 2020

by INTERNATIONAL CODE COUNCIL, INC., and the AMERICAN WOOD COUNCIL

ALL RIGHTS RESERVED.

This publication is a copyrighted work owned by the International Code Council, Inc. (¡°ICC¡±), and

the American Wood Council (¡°AWC¡±). Without advance written permission from ICC, no part of

this publication may be reproduced, distributed or transmitted in any form or by any means,

including, without limitation, electronic, optical or mechanical means (by way of example, and

not limitation, photocopying or recording by or in an information storage retrieval system). For

information on use rights and permissions, please contact: ICC Publications, 4051 Flossmoor

Road, Country Club Hills, IL 60478. Phone 1-888-ICC-SAFE (422-7233).

The information contained in this document is believed to be accurate; however, it is being

provided for informational purposes only and is intended for use only as a guide. Publication of

this document by the ICC should not be construed as the ICC or the AWC engaging in or

rendering engineering, legal or other professional services. Use of the information contained in

this book should not be considered by the user to be a substitute for the advice of a registered

professional engineer, attorney or other professional. If such advice is required, it should be

sought through the services of a registered professional engineer, licensed attorney or other

professional.

Trademarks: ¡°International Code Council,¡± the ¡°International Code Council¡± logo, ¡°ICC,¡± the

¡°ICC¡± logo, ¡°International Building Code,¡± ¡°IBC,¡± and other names and trademarks appearing in

this book are registered trademarks of the International Code Council, Inc., and/or its licensors

(as applicable), and may not be used without permission from ICC. ¡°National Design

Specification¡± and ¡°NDS¡± are registered trademarks of the American Wood Council and may not

be used without permission from AWC.

Errata on various ICC publications may be available at errata.

Cover photos courtesy of AWC. Unless otherwise noted, all photos are courtesy of AWC, ICC or

ATF Fire Research Laboratory.

First Printing: June 2020

PRINTED IN THE USA

T025237

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Contents

Introduction

PART 1

Administration

(Chapters 1 and 2)

vii

1

PART 2

Building Planning

(Chapters 4, 5 and 6)

2021 IBC

¡ö

2021 IBC

¡ö

¡ö

¡ö

¡ö

¡ö

110.3.5

Types IV-A, IV-B and IV-C Connection Protection

Inspection2

202

Definition of Wall, Load-bearing

202

Definition of Mass Timber

5

¡ö

8

202

Definitions of Primary Structural Frame and

Secondary Structural Members

9

202

Definition of Cross-laminated Timber

¡ö

¡ö

¡ö

¡ö

¡ö

2015 IBC

¡ö

¡ö

4

202

Definition of Noncombustible Protection

(for Mass Timber)

13

403.3.2 and 2021 IFC 914.3.1.2

Water Supply to Required Fire Pumps

14

TABLES 504.3, 504.4 and 506.2

General Building Heights and Areas

16

508.4.4.1 and 509.4.1.1

Separated Occupancies and Incidental Use

Separations

27

602.4

Type IV

29

602.4.1

Type IV-A

39

602.4.2

Type IV-B

44

602.4.3

Type IV-C

55

602.4.4

Type IV-HT

58

2018 IBC

11

¡ö

602.4

Type IV

61

2015 IBC

¡ö

602.4

Type IV

62

iii

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iv??CONTENTS

PART 3

Fire Protection

(Chapters 7, 8 and 9)

65

2021 IBC

¡ö

¡ö

¡ö

¡ö

703.6, 703.7, 704.4 and 718.2.1

Fire and Smoke Protection Features

722.7

Fire-resistance Rating of Mass Timber

803.3

Interior Finishes ¨C Heavy Timber Exemption

Chapter 9

Fire Protection and Life Safety Systems

PART 5

Building Envelope, Structural Systems and

Construction Materials

(Chapters 12¨C17, 23 and 25)

95

2021 IBC

66

¡ö

70

¡ö

81

¡ö

83

¡ö

2021 IFC

¡ö

701.6

Owner¡¯s Responsibility

¡ö

80

¡ö

2018 IBC

¡ö

803.3

Heavy Timber Exemption

¡ö

81

¡ö

2015 IBC

¡ö

803.3

Heavy Timber Exemption

1206

Sound Transmission

97

Chapter 13

Energy

106

Chapter 14

Exterior Walls

116

Chapter 15

Roof Assemblies and Structures

118

Chapter 16

Structural Loads

120

1705

Special Inspections and Tests

125

2304

General Construction Requirements ¨C Wood

129

Chapter 25

Gypsum Board, Gypsum Panel Products and

Plaster

141

81

2018 IBC

¡ö

PART 4

Means of Egress and Elevators

(Chapters 10 and 30)

¡ö

87

2304.9.3.2

Nailing

135

2304.11

Heavy Timber Construction

137

2021 IBC

¡ö

¡ö

Chapter 10

Means of Egress

88

Chapter 30

Elevators

91

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CONTENTS??v



PART 6

Special Conditions

(Chapters 31 and 33)

145

2021 IBC

¡ö

3102

Special Construction ¨C Membrane Structures

¡ö

¡ö

3303.3

Daily Fire Safety Inspection

¡ö

146

¡ö

147

3308.4

Fire Safety Requirements for Buildings of Types

IV-A, IV-B and IV-C Construction

149

3312

Water Supply for Fire Protection

Chapter 35

ANSI/APA PRG 320

ASTM D3498

158

D102.2.5

Structural Fire Rating

160

PART 8

Appendices A, B and C

¡ö

153

¡ö

¡ö

Mass Timber 2020.indb 5

157

2021 IBC

2021 IFC

¡ö

PART 7

IBC Referenced Standards

and Appendix D

161

Appendix A

Environmental, Economic and Safety Issues

162

Appendix B

Technical Resources

173

Appendix C

Practice Quiz

174

Bibliography

187

Index

191

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