1、 2014 Oregon Mechanical Specialty CodeFirst Printing: May 2014ISBN: 978-1-60983-518-7COPYRIGHT 2014byINTERNATIONAL CODE COUNCIL, INC.ALL RIGHTS RESERVED. This 2014 Oregon Mechanical Specialty Code contains substantial copyrighted material from the2012 International Mechanical Code, Second Printing,
2、and the 2012 International Fuel Gas Code, Third Printing, which is acopyrighted work owned by the International Code Council, Inc. Without advance written permission from the copyright owner,no part of this book may be reproduced, distributed or transmitted in any form or by any means, including, wi
3、thout limitation,electronic, optical or mechanical means (by way of example and not limitation, photocopying or recording by or in an informa-tion storage retrieval system). For information on permission to copy material exceeding fair use, please contact: Publications,4051 West Flossmoor Road, Coun
4、try Club Hills, IL 60478. Phone 1-888-ICC-SAFE (422-7233).Trademarks: “International Code Council,” the “International Code Council” logo and the “International Mechanical Code” aretrademarks of the International Code Council, Inc.Front and back cover photos credit: Courtesy of Julie Waters.Material
5、 designated IFGSbyAMERICAN GAS ASSOCIATION400 N. Capitol Street, N.W. Washington, DC 20001(202) 824-7000Copyright American Gas Association, 2011. All rights reserved.PRINTED IN THE U.S.A.2014 OREGON MECHANICAL SPECIALTY CODE iiiPREFACEIntroductionInternationally, code officials recognize the need fo
6、r a modern, up-to-date mechanical codeaddressing the design and installation of mechanical systems through requirements emphasizingperformance. The International Mechanical Code, in this 2012 edition, is designed to meet theseneeds through model code regulations that safeguard the public health and
7、safety in all communi-ties, large and small.This comprehensive mechanical code establishes minimum regulations for mechanical systemsusing prescriptive and performance-related provisions. It is founded on broad-based principles thatmake possible the use of new materials and new mechanical designs. T
8、his 2012 edition is fully com-patible with all of the International Codes (I-Codes) published by the International Code Council(ICC), including the International Building Code, International Energy Conservation Code, Interna-tional Existing Building Code, International Fire Code, International Fuel
9、Gas Code, InternationalGreen Construction Code(to be available March 2012), International Plumbing Code, ICC Perfor-mance Code, International Private Sewage Disposal Code, International Property MaintenanceCode, International Residential Code, International Swimming Pool and Spa Code (to be avail-ab
10、le March 2012), International Urban-Wildland Interface Codeand International Zoning Code.The International Mechanical Code provisions provide many benefits, among which is the modelcode development process that offers an international forum for mechanical professionals to dis-cuss performance and pr
11、escriptive code requirements. This forum provides an excellent arena todebate proposed revisions. This model code also encourages international consistency in the appli-cation of provisions.DevelopmentThe first edition of the International Mechanical Code (1996) was the culmination of an effort init
12、i-ated in 1994 by a development committee appointed by the ICC and consisting of representatives ofthe three statutory members of the International Code Council at that time, including: Building Offi-cials and Code Administrators International, Inc. (BOCA), International Conference of Building Offi-
13、cials (ICBO) and Southern Building Code Congress International (SBCCI). The intent was to draft acomprehensive set of regulations for mechanical systems consistent with and inclusive of the scopeof the existing model codes. Technical content of the latest model codes promulgated by BOCA,ICBO and SBC
14、CI was utilized as the basis for the development. This 2012 edition presents the codeas originally issued, with changes approved through the ICC Code Development Process through2010. A new edition such as this is promulgated every 3 years.This code is founded on principles intended to establish prov
15、isions consistent with the scope of amechanical code that adequately protects 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 g
16、ive preferential treatment to par-ticular types or classes of materials, products or methods of construction.AdoptionThe International Mechanical Code is available for adoption and use by jurisdictions internationally.Its use within a governmental jurisdiction is intended to be accomplished through
17、adoption by ref-erence in accordance with proceedings establishing the jurisdictions laws. At the time of adoption,jurisdictions should insert the appropriate information in provisions requiring specific local informa-tion, such as the name of the adopting jurisdiction. These locations are shown in
18、bracketed words insmall capital letters in the code and in the sample ordinance. The sample adoption ordinance onpage xi addresses several key elements of a code adoption ordinance, including the informationrequired for insertion into the code text.0b_pref_OregonMech_2014.fm Page iii Tuesday, May 20
19、, 2014 12:29 PMiv 2014 OREGON MECHANICAL SPECIALTY CODEMaintenanceThe International Mechanical Code is kept up to date through the review of proposed changes sub-mitted by code enforcing officials, industry representatives, design professionals and other inter-ested parties. Proposed changes are car
20、efully considered through an open code developmentprocess in which all interested and affected parties may participate.The contents of this work are subject to change both through the Code Development Cycles andthe governmental body that enacts the code into law. For more information regarding the c
21、odedevelopment process, contact the Codes and Standards Development Department of the Interna-tional Code Council.While the development procedure of the International Mechanical Code assures the highestdegree of care, ICC and ICCs members and those participating in the development of this code donot
22、 accept any liability resulting from compliance or noncompliance with the provisions because ICCand its members do not have the power or authority to police or enforce compliance with the con-tents of this code. Only the governmental body that enacts the code into law has such authority.Code Develop
23、ment Committee Responsibilities(Letter Designations in Front of Section Numbers)In each code development cycle, proposed changes to this code are considered at the Code Devel-opment Hearing by the International Mechanical Code Development Committee. Proposed changesto a code section whose number beg
24、ins with a letter in brackets are considered by a different codedevelopment committee. For instance, proposed changes to code sections which have the letter Bin front (for example, B 309.1), are considered by one of the International Building Code develop-ment committees (IBC-General) at the Code De
25、velopment Hearing.The content of sections in this code which begin with a letter designation is maintained byanother code development committee in accordance with the following:A = Administrative Code Development Committee;B = International Building Code Development Committee (IBCFire Safety, Genera
26、l, Means of Egress or Structural);EC = International Energy Conservation Code Development Committee;F = International Fire Code Development Committee; andFG = International Fuel Gas Code Development Committee.2014 OREGON MECHANICAL SPECIALTY CODE vNote that, for the development of the 2015 edition o
27、f the I-Codes, there will be two groups ofcode development committees and they will meet in separate years. The groupings are as follows: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 cod
28、e sections. Because differ-ent committees will meet in different years, it is possible that some proposals for this code will beheard by a committee in a different year than the year in which the primary committee for this codemeets.For example, every section of Chapter 1 of this code is designated
29、as the responsibility of theAdministrative Code Development Committee, and that committee is part of the Group B codehearings. This committee will conduct its code development hearings in 2013 to consider all codechange proposals for Chapter 1 of this code and proposals for Chapter 1 of all I-Codes.
30、 Therefore,any proposals received for Chapter 1 of this code will be deferred for consideration in 2013 by theAdministrative Code Development Committee.Another example is Section 606.4 of this code which is designated as the responsibility of theInternational Fire Code Development Committee. This co
31、mmittee will conduct its code develop-ment hearings in 2013 to consider code change proposals in its purview, which includes any propos-als to Section 606.4.In some cases, another committee in Group A will be responsible for a section of this code. Forexample, Section 607.3 has a B in front of the n
32、umbered section, indicating that this section of thecode is the responsibility of one of the International Building Code Development Committees. TheInternational Building Code is in Group A; therefore, any code change proposals to this section willbe due before the Group A deadline of January 3, 201
33、2, and these code change proposals will beassigned to the appropriate International Building Code Development Committee for consideration.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
34、the subject of the code changeproposal. For further information on the code development committee responsibilities, please visitthe ICC web site at www.iccsafe.org/scoping.Group A Codes(Heard in 2012, Code Change Proposals Deadline: January 3, 2012)Group B Codes(Heard in 2013, Code Change ProposalsD
35、eadline: January 3, 2013)International Building Code Administrative Provisions (Chapter 1 all codes exceptIRC and ICC PC, administrative updates to currently ref-erenced standards, and designated definitions)International Fuel Gas Code International Energy Conservation CodeInternational Mechanical C
36、ode International Existing Building CodeInternational Plumbing Code International Fire CodeInternational Private Sewage Disposal CodeInternational Green Construction CodeICC Performance CodeInternational Property Maintenance CodeInternational Residential CodeInternational Swimming Pool and Spa CodeI
37、nternational Wildland-Urban Interface CodeInternational Zoning Codevi 2014 OREGON MECHANICAL SPECIALTY CODEMarginal MarkingsItalicized TermsSelected terms set forth in Chapter 2, Definitions, are italicized where they appear in code text.Such terms are not italicized where the definition set forth i
38、n Chapter 2 does not impart theintended meaning in the use of the term. The terms selected have definitions which the user shouldread carefully to facilitate better understanding of the code.a172 = Indicates where an entire section, paragraph, exception or table has been deleted or an item in a list
39、 of items or a table has been deleted. = Indicates IMC and IFGC model code language deleted by Oregon. Appendix C is IFGC model code language with some modification by Oregon.| = Indicates a technical change from the requirements of the ICC 2009 edition. | = Indicates a State of Oregon amendment has
40、 been made to the International Code. Minor changes, such as section renumbering and removal of references to International Codes are not indicated with a double rule in the margin.2012 OREGON MECHANICAL SPECIALTY CODE viiEffective Use of the International Mechanical CodeThe International Mechanical
41、 Code(IMC) is a model code that regulates the design and installa-tion of mechanical systems, appliances, appliance venting, duct and ventilation systems, combus-tion air provisions, hydronic systems and solar systems. The purpose of the code is to establish theminimum acceptable level of safety and
42、 to protect life and property from the potential dangersassociated with the installation and operation of mechanical systems. The code also protects thepersonnel that install, maintain, service and replace the systems and appliances addressed by thiscode.The IMC is primarily a prescriptive code with
43、 some performance text. The code relies heavily onproduct specifications and listings to provide much of the appliance and equipment installationrequirements. The general Section 105.2 and the exception to Section 403.2 allow designs andinstallations to be performed by approved engineering methods a
44、s alternatives to the prescriptivemethods in the code.The format of the IMC allows each chapter to be devoted to a particular subject with the excep-tion of Chapter 3, which contains general subject matters that are not extensive enough to warranttheir own independent chapter.Chapter 1 Scope and Adm
45、inistration. Chapter 1 establishes the limits of applicability of the codeand describes how the code is to be applied and enforced. A mechanical code, like any other code,is intended to be adopted as a legally enforceable document and it cannot be effective without ade-quate provisions for its admin
46、istration and enforcement. The provisions of Chapter 1 establish theauthority and duties of the code official appointed by the jurisdiction having authority and alsoestablish the rights and privileges of the design professional, contractor and property owner.Chapter 2 Definitions. Chapter 2 is the r
47、epository of the definitions of terms used in the body of thecode. Codes are technical documents and every word and term can impact the meaning of the codetext and the intended results. The code often uses terms that have a unique meaning in the codeand the code meaning can differ substantially from
48、 the ordinarily understood meaning of the termas used outside of the code.The terms defined in Chapter 2 are deemed to be of prime importance in establishing the mean-ing and intent of the code text that uses the terms. The user of the code should be familiar with andconsult this chapter because the
49、 definitions are essential to the correct interpretation of the codeand because the user may not be aware that a term is defined.Chapter 3 General Regulations. Chapter 3 contains broadly applicable requirements related toappliance location and installation, appliance and systems access, protection of structural elements,condensate disposal and clearances to combustibles, among others.Chapter 4 Ventilation. Chapter 4 includes means for protecting building occupant health by
