ICC I-CODE IBC-2018 I-Codes IBC - International Building Code.pdf

1、 2 0 1 8INTERNATIONAL CODESGet a free 45-day online subscription to ICCs premiumACCESS2018 I-Codes Complete Collection. Test drive many powerful, time-saving tools available to you from premiumACCESS. To activate your bonus, visit www.iccsafe.org/codebonus.2018 I-CODE BONUS OFFERIBCA Member of the I

2、nternational Code FamilyINTERNATIONALBUILDING CODE2018 International Building CodeFirst Printing: August 2017ISBN: 978-1-60983-735-8 (soft-cover edition)ISBN: 978-1-60983-734-1 (loose-leaf edition)COPYRIGHT 2017byINTERNATIONAL CODE COUNCIL, INC.Date of First Publication: August 31, 2017ALL RIGHTS RE

3、SERVED. This 2018 International Building Codeis a copyrighted work owned by the International CodeCouncil, Inc. Without advance written permission from the copyright owner, no part of this book may be reproduced, distributedor transmitted in any form or by any means, including, without limitation, e

4、lectronic, optical or mechanical means (by way ofexample, and not limitation, photocopying, or recording by or in an information storage retrieval system). For information onuse rights and permissions, please contact: Publications, 4051 Flossmoor Road, Country Club Hills, IL 60478. Phone 1-888-ICC-S

5、AFE (422-7233). Trademarks: “International Code Council,” the “International Code Council” logo, “ICC,” the “ICC” logo, “International Build-ing Code,” “IBC” and other names and trademarks appearing in this book are trademarks of the International Code Council, Inc.,and/or its licensors (as applicab

6、le), and may not be used without permission.PRINTED IN THE U.S.A.2018 INTERNATIONAL BUILDING CODEiiiPREFACEIntroductionThe International Building Code(IBC) establishes minimum requirements for building systemsusing prescriptive and performance-related provisions. It is founded on broad-based princip

7、les thatmake possible the use of new materials and new building designs. This 2018 edition is fully compat-ible with all of the International Codes(I-Codes) published by the International Code Council(ICC), including the International Energy Conservation Code, International Existing Building Code,In

8、ternational Fire Code, International Fuel Gas Code, International Green Construction Code,International Mechanical Code, International Plumbing Code, International Private Sewage Dis-posal Code, International Property Maintenance Code, International Residential Code, Interna-tional Swimming Pool and

9、 Spa Code, International Wildland-Urban Interface Code, InternationalZoning Codeand International Code Council Performance Code.The I-Codes, including this International Building Code, are used in a variety of ways in both thepublic and private sectors. Most industry professionals are familiar with

10、the I-Codes as the basis oflaws and regulations in communities across the U.S. and in other countries. However, the impact ofthe codes extends well beyond the regulatory arena, as they are used in a variety of nonregulatorysettings, including: Voluntary compliance programs such as those promoting su

11、stainability, energy efficiencyand disaster resistance. The insurance industry, to estimate and manage risk, and as a tool in underwriting and ratedecisions. Certification and credentialing of individuals involved in the fields of building design, con-struction and safety. Certification of building

12、and construction-related products. U.S. federal agencies, to guide construction in an array of government-owned properties. Facilities management. “Best practices” benchmarks for designers and builders, including those who are engaged inprojects in jurisdictions that do not have a formal regulatory

13、system or a governmentalenforcement mechanism. College, university and professional school textbooks and curricula. Reference works related to building design and construction.In addition to the codes themselves, the code development process brings together building pro-fessionals on a regular basis

14、. It provides an international forum for discussion and deliberationabout building design, construction methods, safety, performance requirements, technologicaladvances and innovative products.DevelopmentThis 2018 edition presents the code as originally issued, with changes reflected in the 2003 thr

15、ough2015 editions and further changes approved by the ICC Code Development Process through 2017. Anew edition such as this is promulgated every 3 years.This code is intended to establish provisions that adequately protect public health, safety andwelfare; that do not unnecessarily increase construct

16、ion costs; that do not restrict the use of newmaterials, products or methods of construction; and that do not give preferential treatment to par-ticular types or classes of materials, products or methods of construction.iv 2018 INTERNATIONAL BUILDING CODEMaintenanceThe International Building Code is

17、 kept up to date through the review of proposed changes submit-ted by code enforcement officials, industry representatives, design professionals and other inter-ested parties. Proposed changes are carefully considered through an open code developmentprocess in which all interested and affected parti

18、es may participate.The ICC Code Development Process reflects principles of openness, transparency, balance, dueprocess and consensus, the principles embodied in OMB Circular A-119, which governs the federalgovernments use of private-sector standards. The ICC process is open to anyone; there is no co

19、st toparticipate, and people can participate without travel cost through the ICCs cloud-based app, cdp-Access. A broad cross section of interests are represented in the ICC Code Development Process.The codes, which are updated regularly, include safeguards that allow for emergency action whenrequire

20、d for health and safety reasons.In order to ensure that organizations with a direct and material interest in the codes have a voicein the process, the ICC has developed partnerships with key industry segments that support theICCs important public safety mission. Some code development committee membe

21、rs were nomi-nated by the following industry partners and approved by the ICC Board: American Institute of Architects (AIA) National Association of Home Builders (NAHB) National Association of State Fire Marshals (NASFM)The code development committees evaluate and make recommendations regarding prop

22、osedchanges to the codes. Their recommendations are then subject to public comment and council-widevotes. The ICCs governmental memberspublic safety officials who have no financial or businessinterest in the outcomecast the final votes on proposed changes.The contents of this work are subject to cha

23、nge through the code development cycles and by anygovernmental entity that enacts the code into law. For more information regarding the code devel-opment process, contact the Codes and Standards Development Department of the InternationalCode Council.While the I-Code development procedure is thoroug

24、h and comprehensive, the ICC, its membersand those participating in the development of the codes disclaim any liability resulting from thepublication or use of the I-Codes, or from compliance or noncompliance with their provisions. TheICC does not have the power or authority to police or enforce com

25、pliance with the contents of thiscode.Code Development Committee Responsibilities(Letter Designations in Front of Section Numbers)In each code development cycle, code change proposals to this code are considered at the Commit-tee Action Hearings by 11 different code development committees. Four of t

26、hese committees haveprimary responsibility for designated chapters and appendices as follows:IBCEgress Code Development Committee BE: Chapters 10, 11, Appendix EIBCFire Safety Code Development Committee BF: Chapters 7, 8, 9, 14, 26IBCGeneral Code Development Committee BG: Chapters 2, 3, 4, 5, 6, 12,

27、 27, 28, 29, 30, 31, 32, 33, Appendices A, B, C, D, K, NIBCStructural Code Development Committee BS: Chapters 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, Appendices F, G, H, I, J, L, M2018 INTERNATIONAL BUILDING CODEvCode change proposals to sections of the code that are preceded by a bracketed lett

28、er designa-tion, such as A, will be considered by a committee other than the building code committee listedfor the chapter or appendix on the preceding page. For example, proposed code changes to SectionF 307.1.1 will be considered by the International Fire Code Development Committee during theCommi

29、ttee Action Hearing in the 2018 (Group A) code development cycle.Another example is Section BF 1505.2. While code change proposals to Chapter 15 are primar-ily the responsibility of the IBCStructural Code Development Committee, which considers codechange proposals during the 2019 (Group B) code deve

30、lopment cycle, Section 1505.2 is the respon-sibility of the IBCFire Safety Code Development Committee, which considers code change propos-als during the 2018 (Group A) code development cycle.The bracketed letter designations for committees responsible for portions of this code are as fol-lows:A = Ad

31、ministrative Code Development Committee;BE = IBCEgress Code Development Committee;BF = IBCFire Safety Code Development Committee;BG = IBCGeneral Code Development Committee;BS = IBCStructural Code Development Committee;E = International Commercial Energy Conservation Code Development Committee or Int

32、ernational Residential Energy Conservation Code Development Committee;EB = International Existing Building Code Development Committee;F = International Fire Code Development Committee;FG = International Fuel Gas Code Development Committee;M = International Mechanical Code Development Committee; andP

33、 = International Plumbing Code Development Committee.For the development of the 2021 edition of the I-Codes, there will be two groups of code devel-opment committees and they will meet in separate years.vi 2018 INTERNATIONAL BUILDING CODECode change proposals submitted for code sections that have a

34、letter designation in front ofthem will be heard by the respective committee responsible for such code sections. Because differ-ent committees hold Committee Action Hearings in different years, proposals for the IBC will beheard by committees in both the 2018 (Group A) and the 2019 (Group B) code de

35、velopment cycles.For instance, every section of Chapter 16 is the responsibility of the IBCStructural Code Devel-opment Committee. As noted in the preceding table, that committee will hold its Committee ActionHearings in 2019 to consider code change proposals for the chapters for which it is respons

36、ible.Therefore any proposals received for Chapter 16 of this code will be assigned to the IBCStructuralCode Development Committee and will be considered in 2019, during the Group B code changecycle.As another example, every section of Chapter 1 of this code is designated as the responsibility ofthe

37、Administrative Code Development Committee, which is part of the Group B portion of the hear-ings. This committee will hold its Committee Action Hearings in 2019 to consider code change pro-posals for Chapter 1 of all I-Codes except the International Energy Conservation Code, InternationalResidential

38、 Code and International Green Construction Code. Therefore, any proposals received forChapter 1 of this code will be assigned to the Administrative Code Development Committee for con-sideration in 2019.It is very important that anyone submitting code change proposals understands which codedevelopmen

39、t committee is responsible for the section of the code that is the subject of the codechange proposal. For further information on the Code Development Committee responsibilities,please visit the ICC website at www.iccsafe.org/scoping.Group A Codes(Heard in 2018, Code Change ProposalsDeadline: Januar

40、y 8, 2018)Group B Codes(Heard in 2019, Code Change ProposalsDeadline: January 7, 2019)International Building Code Egress (Chapters 10, 11, Appendix E) Fire Safety (Chapters 7, 8, 9, 14, 26) General (Chapters 26, 12, 2733,Appendices A, B, C, D, K, N)Administrative Provisions (Chapter 1 of allcodes ex

41、cept IECC, IRC and IgCC, administra-tive updates to currently referenced stan-dards, and designated definitions)International Fire Code International Building Code Structural (Chapters 1525, Appendices F,G, H, I, J, L, M)International Fuel Gas Code International Existing Building CodeInternational M

42、echanical Code International Energy Conservation CodeCommercialInternational Plumbing Code International Energy Conservation CodeResidential IECCResidential IRCEnergy (Chapter 11)International Property Maintenance Code International Green Construction Code(Chapter 1)International Private Sewage Disp

43、osal Code International Residential Code IRCBuilding (Chapters 110,Appendices E, F, H, J, K, L, M, O, Q, R, S, T)International Residential Code IRCMechanical (Chapters 1223) IRCPlumbing (Chapters 2533, Appendices G, I, N, P)International Swimming Pool and Spa CodeInternational Wildland-Urban Interfa

44、ce CodeInternational Zoning CodeNote: Proposed changes to the ICC Performance Code will be heard by the code development committee noted in brack-ets in the text of the ICC Performance Code.2018 INTERNATIONAL BUILDING CODEviiMarginal MarkingsSolid vertical lines in the margins within the body of the

45、 code indicate a technical change from therequirements of the 2015 edition. Deletion indicators in the form of an arrow ( ) are provided inthe margin where an entire section, paragraph, exception or table has been deleted or an item in alist of items or a table has been deleted.A single asterisk * p

46、laced in the margin indicates that text or a table has been relocated withinthe code. A double asterisk * placed in the margin indicates that the text or table immediatelyfollowing it has been relocated there from elsewhere in the code. The following table indicates suchrelocations in the 2018 editi

47、on of the International Building Code.Coordination of the International CodesThe coordination of technical provisions is one of the strengths of the ICC family of model codes.The codes can be used as a complete set of complementary documents, which will provide userswith full integration and coordin

48、ation of technical provisions. Individual codes can also be used insubsets or as stand-alone documents. To make sure that each individual code is as complete as pos-sible, some technical provisions that are relevant to more than one subject area are duplicated insome of the model codes. This allows

49、users maximum flexibility in their application of the I-Codes.Italicized TermsSelected words and terms defined in Chapter 2, Definitions, are italicized where they appear in codetext and the Chapter 2 definition applies. Where such words and terms are not italicized, common-use definitions apply. The words and terms selected have code-specific definitions that the usershould read car