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 OFFERINTERNATIONALMECHANI
2、CAL CODEIMCA Member of the International Code Family2018 International Mechanical CodeFirst Printing: August 2017ISBN: 978-1-60983-743-3 (soft-cover edition)ISBN: 978-1-60983-742-6 (loose-leaf edition)COPYRIGHT 2017byINTERNATIONAL CODE COUNCIL, INC.Date of First Publication: August 31, 2017ALL RIGHT
3、S RESERVED. This 2018 International Mechanical 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 limitat
4、ion, electronic, optical or mechanical means (by way ofexample, and not limitation, photocopying or recording by or in an information storage retrieval system). For information on userights and permissions, please contact: Publications, 4051 Flossmoor Road, Country Club Hills, IL 60478. Phone 1-888-
5、ICC-SAFE (422-7233). Trademarks: “International Code Council,” the “International Code Council” logo, “ICC,” the “ICC” logo, “InternationalMechanical Code,” “IMC” and other names and trademarks appearing in this book are trademarks of the International CodeCouncil, Inc., and/or its licensors (as app
6、licable), and may not be used without permission.PRINTED IN THE U.S.A.2018 INTERNATIONAL MECHANICAL CODEiiiPREFACEIntroductionThe International Mechanical Code(IMC) establishes minimum requirements for mechanical sys-tems using prescriptive and performance-related provisions. It is founded on broad-
7、based principlesthat make possible the use of new materials and new mechanical designs. This 2018 edition is fullycompatible with all of the International Codes(I-Codes) published by the International CodeCouncil(ICC), including the International Building Code, International Energy ConservationCode,
8、 International Existing Building Code, International Fire Code, International Fuel Gas Code,International Green Construction Code, International Plumbing Code, International Private Sew-age Disposal Code, International Property Maintenance Code, International Residential Code,International Swimming
9、Pool and Spa Code, International Wildland-Urban Interface Code, Inter-national Zoning Codeand International Code Council Performance Code.The I-Codes, including this International Mechanical Code, are used in a variety of ways in boththe public and private sectors. Most industry professionals are fa
10、miliar with the I-Codes as the basisof laws and regulations in communities across the U.S. and in other countries. However, the impactof 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 thos
11、e promoting sustainability, 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. Certificatio
12、n of building 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 form
13、al regulatory 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
14、 regular basis. 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 i
15、n the 2003 through2015 editions and further changes approved by the ICC Code Development Process through 2016. Anew edition such as this is promulgated every 3 years.This code is founded on principles intended to establish provisions consistent with the scope of amechanical code that adequately prot
16、ects public health, safety and welfare; provisions that do notunnecessarily increase 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,
17、products or methods of construction.iv 2018 INTERNATIONAL MECHANICAL CODEMaintenanceThe International Mechanical Code is kept up to date through the review of proposed changes sub-mitted by code enforcement officials, industry representatives, design professionals and otherinterested parties. Propos
18、ed changes are carefully considered through an open code developmentprocess in which all interested and affected parties may participate.The ICC Code Development Process reflects principles of openness, transparency, balance, dueprocess and consensus, the principles embodied in OMB Circular A-119, w
19、hich governs the federalgovernments use of private-sector standards. The ICC process is open to anyone; there is no cost 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 Deve
20、lopment Process.The codes, which are updated regularly, include safeguards that allow for emergency action whenrequired 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
21、with key industry segments that support theICCs important public safety mission. Some code development committee members 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)The code devel
22、opment committees evaluate and make recommendations regarding proposedchanges 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 vote
23、s on proposed changes.The contents of this work are subject to change 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 Internati
24、onalCode Council.While the I-Code development procedure is thorough 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. Th
25、eICC does not have the power or authority to police or enforce compliance with the contents of thiscode.Code Development Committee Responsibilities(Letter Designations in Front of Section Numbers)In each code development cycle, proposed changes to this code are considered at the CommitteeAction Hear
26、ings by the International Mechanical Code Development Committee, whose action con-stitutes a recommendation to the voting membership for final action on the proposed change. Codechange proposals to sections of the code that are preceded by a bracketed letter designation areconsidered by a different
27、code development committee. For example, proposed changes to codesections that have BG in front of them (e.g., BG 309.1) are considered by the IBCGeneral CodeDevelopment Committee at the Committee Action Hearing.The bracketed letter designations for committees responsible for portions of this code a
28、re as fol-lows:A = Administrative Code Development CommitteeBE = IBCEgress Code Development CommitteeBF = IBCFire Safety Code Development CommitteeBG = IBCGeneral Code Development CommitteeBS = IBCStructural Code Development Committee2018 INTERNATIONAL MECHANICAL CODEvE = International Energy Conser
29、vation Code Development CommitteeF = International Fire Code Development CommitteeFG = International Fuel Gas Code Development CommitteeP = International Plumbing CodeFor the development of the 2021 edition of the I-Codes, there will be two groups of code devel-opment committees and they will meet i
30、n separate years.Code change proposals submitted for code sections that have a 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 this code wil
31、l beheard by committees in both the 2018 (Group A) and the 2019 (Group B) code development cycles.For example, every section of Chapter 1 of this code is designated as the responsibility of theAdministrative Code Development Committee, and that committee is part of the Group B codehearings. This com
32、mittee will conduct its code development hearings in 2019 to consider all codechange proposals for Chapter 1 of this code and proposals for Chapter 1 of all I-Codes except theInternational Energy Conservation Code, International Residential Code and International GreenConstruction Code. Therefore, a
33、ny proposals received for Chapter 1 of this code will be assigned tothe Administrative Code Development Committee for consideration in 2019.Another example is Section F 606.4 of this code, which is designated as the responsibility of theInternational Fire Code Development Committee. This committee w
34、ill conduct its code develop-ment hearings in 2019 to consider code change proposals in its purview, which includes any propos-als to Section F 606.4.Group A Codes(Heard in 2018, Code Change ProposalsDeadline: January 8, 2018)Group B Codes(Heard in 2019, Code Change ProposalsDeadline: January 7, 201
35、9)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 except IECC, IRC and IgCC, administra-tive updates to currently referenced stan-dards,
36、 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 Mechanical Code International Energy Conservation CodeCommercialInternational Plumbin
37、g Code 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,
38、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 Interface CodeInternational Zoning CodeNote: Proposed changes to the ICC Performance Code w
39、ill be heard by the code development committee noted in brack-ets in the text of the ICC Performance Code.vi 2018 INTERNATIONAL MECHANICAL CODEIn some cases, another committee in Group A will be responsible for a section of this code. Forexample, Section 607 has a BF in front of the numbered section
40、s, indicating that these sections ofthe code are the responsibility of one of the International Building Code Development Committees.The International Building Code is in Group A; therefore, any code change proposals to this sectionwill be due before the Group A deadline of January 2018, and these c
41、ode change proposals will beassigned to the appropriate International Building Code Development Committee for consideration.It is very important that anyone submitting code change proposals understands which codedevelopment committee is responsible for the section of the code that is the subject of
42、the codechange proposal. For further information on the Code Development Committee responsibilities,please visit the 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 ed
43、ition. 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.Coordination of the International CodesThe coordination of technical provisions is one of
44、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 coordination of technical provisions. Individual codes can also be used insubsets or as stand-alone documents. To make sure that each i
45、ndividual 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 TermsWord and terms defined in Chapter 2, Definitions,
46、are italicized where they appear in code text andthe Chapter 2 definitions applies. Where such words and terms are not italicized, common-use defi-nitions apply. The words and terms selected have code-specific definitions that the user should readcarefully to facilitate better understanding of the c
47、ode.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 acknow
48、ledge 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. All I-Codesand I-Standards, alo
49、ng with the laws of many jurisdictions, are available for free in a nondownload-able form on the ICCs website. Jurisdictions should contact the ICC at adoptionsiccsafe.org tolearn how to adopt and distribute laws based on the International Mechanical Code in a mannerthat provides necessary access, while maintaining the ICCs copyright.a1722018 INTERNATIONAL MECHANICAL CODEviiTo facilitate adoption, se
