ICC I-CODE IRC-2018 I-Codes IRC - International Residential Code for One and Two-Family Dwellings.pdf

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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 OFFERINTERNATIONALRESIDEN

2、TIAL CODEfor One- and Two-Family DwellingsIRCA Member of the International Code FamilyINCLUDES Residential requirements from NFPA 70: National Electrical Code2017 The electrical code designated for use with the I-Codes2018 International Residential CodeFirst Printing: August 2017ISBN: 978-1-60983-73

3、7-2 (soft-cover edition)ISBN: 978-1-60983-736-5 (loose-leaf edition)COPYRIGHT 2017byINTERNATIONAL CODE COUNCIL, INC.Date of First Publication: August 31, 2017ALL RIGHTS RESERVED. This 2018 International Residential Codeis a copyrighted work owned by the International CodeCouncil, Inc. Without advanc

4、e 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, electronic, optical or mechanical means (by way ofexample, and not limitation, photocopying or recording by or in an informatio

5、n storage retrieval system). For information on userights and permissions, please contact: Publications, 4051 Flossmoor Road, Country Club Hills, IL 60478. Phone 1-888-ICC-SAFE (422-7233). Trademarks: “International Code Council,” the “International Code Council” logo, “ICC,” the “ICC” logo, “Intern

6、ational Resi-dential Code,” “IRC” and other names and trademarks appearing in this book are trademarks of the International Code Council,Inc., and/or its licensors (as applicable), and may not be used without permission.PRINTED IN THE U.S.A.2018 INTERNATIONAL RESIDENTIAL CODEiiiPREFACEIntroductionTh

7、e International Residential Code(IRC) establishes minimum requirements for one- and two-family dwellings and townhouses using prescriptive provisions. It is founded on broad-based princi-ples that make possible the use of new materials and new building designs. This 2018 edition is fullycompatible w

8、ith all of the International Codes(I-Codes) published by the International CodeCouncil(ICC), including the International Building Code, International Energy ConservationCode, International Existing Building Code, International Fire Code, International Fuel GasCode, International Green Construction C

9、ode, International Mechanical Code, InternationalPlumbing Code, International Private Sewage Disposal Code, International Property MaintenanceCode, International Swimming Pool and Spa Code, International Wildland-Urban InterfaceCode, International Zoning Codeand International Code Council Performanc

10、e Code.The I-Codes, including this International Residential Code, are used in a variety of ways in boththe public and private sectors. Most industry professionals are familiar with the I-Codes as the basisof laws and regulations in communities across the U.S. and in other countries. However, the im

11、pactof the codes extends well beyond the regulatory arena, as they are used in a variety of nonregula-tory settings, including: Voluntary compliance programs such as those promoting sustainability, energy efficiencyand disaster resistance. The insurance industry, to estimate and manage risk, and as

12、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 and construction-related products. U.S. federal agencies, to guide construction in an array of government-owned prop

13、erties. Facilities management. “Best practices” benchmarks for designers and builders, including those who are engaged inprojects in jurisdictions that do not have a formal regulatory system or a governmentalenforcement mechanism. College, university and professional school textbooks and curricula.

14、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. It provides an international forum for discussion and deliberationabout building design, construction methods, saf

15、ety, performance requirements, technologicaladvances and innovative products.DevelopmentThis 2018 edition presents the code as originally issued, with changes reflected in the 2003 through2015 editions and further changes approved by the ICC Code Development Process through 2017.Residential electric

16、al provisions are based on the 2017 National Electrical Code(NFPA 70). A newedition such as this is promulgated every 3 years.Fuel gas provisions have been included through an agreement with the American Gas Associa-tion (AGA). Electrical provisions have been included through an agreement with the N

17、ational FireProtection Association (NFPA).iv 2018 INTERNATIONAL RESIDENTIAL CODEThis code is founded on principles intended to establish provisions consistent with the scope of aresidential code that adequately protects public health, safety and welfare; provisions that do notunnecessarily increase

18、construction costs; provisions that do not restrict the use of new materials,products or methods of construction; and provisions that do not give preferential treatment to par-ticular types or classes of materials, products or methods of construction.MaintenanceThe International Residential Code is

19、kept up-to-date through the review of proposed changes sub-mitted by code enforcement officials, industry representatives, design professionals and otherinterested parties. Proposed changes are carefully considered through an open code developmentprocess in which all interested and affected parties

20、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 cost

21、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 whenrequired f

22、or 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 members

23、were nomi-nated by the following industry partners and approved by the ICC Board: National Association of Home Builders (NAHB) National Council of Structural Engineers Association (NCSEA)The code development committees evaluate and make recommendations regarding proposedchanges to the codes. Their r

24、ecommendations 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 change through the code development

25、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.The maintenance process for the fuel gas provisions is based on the process used t

26、o maintain theInternational Fuel Gas Code, in conjunction with the American Gas Association. The maintenanceprocess for the electrical provisions is undertaken by the National Fire Protection Association.While the I-Code development procedure is thorough and comprehensive, the ICC, its membersand th

27、ose 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 compliance with the contents of thiscode.Code Deve

28、lopment Committee ResponsibilitiesIn each code development cycle, proposed changes to the code are considered at the CommitteeAction Hearings by the applicable International Code Development Committee as follows:RB = IRCBuilding Code Development CommitteeRE = International Residential Energy Conserv

29、ation Code Development Committee;MP = IRCMechanical/Plumbing Code Development Committee2018 INTERNATIONAL RESIDENTIAL CODEvThe RE committee is also responsible for the IECCResidential Provisions and Appendix T.For the development of the 2021 edition of the I-Codes, there will be two groups of code d

30、evel-opment committees and they will meet in separate years.Code change proposals submitted to Chapters 1 and 3 through 10, Appendices E, F, H, J, K, L, M,O, Q, R, S, T and Definitions designated RB of the International Residential Code are heard by theIRCBuilding Committee during the Group B (2019)

31、 cycle code development hearing. Code changeproposals submitted to Chapter 11 are heard by the International Energy Conservation Code Devel-opment Committee during the Group B (2019) cycle code development hearing. Proposed changesto all other chapters are heard by the IRC Plumbing and Mechanical Co

32、mmittee during the Group A(2018) code development cycle. It is very important that anyone submitting code change proposals understand which code devel-opment committee is responsible for the section of the code that is the subject of the code changeproposal. For further information on the code devel

33、opment committee responsibilities, please visitthe ICC website at www.iccsafe.org/scoping.Marginal MarkingsSolid vertical lines in the margins within the body of the code indicate a technical change from therequirements of the 2015 edition. Deletion indicators in the form of an arrow ( ) are provide

34、d 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.Group A Codes(Heard in 2018, Code Change ProposalsDeadline: January 8, 2018)Group B Codes(Heard in 2019, Code Change ProposalsDeadline: January 7, 2019)Inte

35、rnational 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 except IECC, IRC and IgCC, administra-tive updates to currently referenced stan-dards, and d

36、esignated 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 Mechanical Code International Energy Conservation CodeCommercialInternational Plumbing Code

37、 International Energy Conservation CodeResidential IECCResidential IRCEnergy (Chapter 11)International Property Maintenance Code International Green Construction Code(Chapter 1)International Private Sewage Disposal Code International Residential Code IRCBuilding (Chapters 110,Appendices E, F, H, J,

38、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 Interface CodeInternational Zoning CodeNote: Proposed changes to the ICC Performance Code will be

39、 heard by the code development committee noted in brack-ets in the text of the ICC Performance Code.vi 2018 INTERNATIONAL RESIDENTIAL CODEA single asterisk * placed in the margin indicates that text or a table has been relocated withinthe code. A double asterisk * placed in the margin indicates that

40、 the text or table immediatelyfollowing it has been relocated there from elsewhere in the code. The following table indicates suchrelocations in the 2018 edition of the International Residential Code.Coordination of the International CodesThe coordination of technical provisions is one of the streng

41、ths 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 coordination of technical provisions. Individual codes can also be used insubsets or as stand-alone documents. To make sure that each individual

42、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 users maximum flexibility in their application of the I-Codes.Italicized TermsSelected words and terms defined in Chapter 2, Definitions,

43、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 carefully to facilitate better understanding of the cod

44、e.AdoptionThe International Code Council maintains a copyright in all of its codes and standards. Maintainingcopyright allows the ICC to fund its mission through sales of books, in both print and electronic for-mats. The ICC welcomes adoption of its codes by jurisdictions that recognize and acknowle

45、dge theICCs copyright in the code, and further acknowledge the substantial shared value of the public/pri-vate partnership for code development between jurisdictions and the ICC.The ICC also recognizes the need for jurisdictions to make laws available to the public. AllI-Codes and I-Standards, along

46、 with the laws of many jurisdictions, are available for free in anondownloadable form on the ICCs website. Jurisdictions should contact the ICC at adop-tionsiccsafe.org to learn how to adopt and distribute laws based on the International Resi-dential Code in a manner that provides necessary access,

47、while maintaining the ICCscopyright.To facilitate adoption, several sections of this code contain blanks for fill-in informationthat needs to be supplied by the adopting jurisdiction as part of the adoption legislation. Forthis code, please see:Section R101.1. Insert: NAME OF JURISDICTIONTable R301.

48、2(1)Jurisdictions to fill in details as directed by provisions of the code.Section P2603.5.1 Insert: NUMBER OF INCHES IN TWO LOCATIONS2018 LOCATION 2015 LOCATIONR703.3.1.2 R703.11.1.42018 INTERNATIONAL RESIDENTIAL CODEviiEFFECTIVE USE OF THE INTERNATIONAL RESIDENTIAL CODEEffective Use of the Interna

49、tional Residential CodeThe International Residential Code(IRC) was created to serve as a complete, comprehensivecode regulating the construction of single-family houses, two-family houses (duplexes) and build-ings consisting of three or more townhouse units. All buildings within the scope of the IRC are lim-ited to three stories above grade plane. For example, a four-story single-family house would fallw