1、 m 9008479 0005378 667 m The BOCA“ National Mechanical Codell 993 Commentary BUILDING OFFICIALS AND CODE ADMINISTRATORS INTERNATIONAL, INC. Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not for Resale No reproduction or networking per
2、mitted without license from IHS -,-,-m 9008479 0005379 5T5 m The BOCA“ National Mechanical Codell 993 Commentary BUILDING OFFICIALS Complex 6 Omega-Terrace Westerville, Ohio 43081-9308 Suite 201 10830 E. 45th Street, Ste. 200 Latham, NY 12110-1939 Telephone 6141890-1064 Trevose, PA 19053-6338 Tulsa,
3、 OK 741 46-3809 Telephone 51 8I782-1708 Facsimile 61 4/890-9712 Telephone 21 51638-0554 Telephone 91 8/664-4434 Facsimile 51 81783-0889 Facsimile 21 5/638-4438 Facsimile 91 8/664-4435 Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not
4、for Resale No reproduction or networking permitted without license from IHS -,-,- = 9008479 0005380 217 = Copyright, I993 Building Officials and Code Administrators International, Inc. All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic
5、or mechanical, including photocopy, recording or by an information storage and retrieval system without advance permission in writing from the publisher. For information, address: Building Officials and Code Administrators International, 4051 West Flossmoor Road, Country Club Hills, Illinois 60478-5
6、79s. BOCA is the trademark of Building Officials and Code Administrators International, Inc., and is registered in the US. Patent and Trademark OfJice. Printed in the United States of America First printing: August, 1993 Second printing: March, 1994 Third printing: December, 1995 Fourth printing: Ju
7、ne, 1996 Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not for Resale No reproduction or networking permitted without license from IHS -,-,-= 9008479 0005383 353 PREFACE The principal purpose of the Commentary is to provide a basic bo
8、dy of accepted knowledge about the mechanical regulations set forth in the BOCA National Mechanical Codel1993. Thus, it is intended as a comprehensive, convenient source of basic information for anyone who is serious about effective code enforcement. Its use is intended for persons new to the BOCA C
9、ode, as well as for the more experienced persons. In an industry as broad and encompassing as code enforcement, even the established professional has a need for reliable referral sources or to learn about less familiar topics. The reader will find particular emphasis on the codes accountability in g
10、eneral. Each sections narrative includes a statement of its objective and intent, and usually includes a discussion about why the requirement commands the conditions set forth. Giving credence to the comments are further discussions about when the requirement is used, enforcement guidelines and the
11、consequences of not adhering to the code. Discussions which provide insight to the reader by giving historical and technical background information are included as well. Reference lists and bibliographies that access a broad range of literature and the sources of information available in the industr
12、y have been included. Readers should note that the Commentary is to be used in conjunction with the BOCA National Mechanical Code11993 and not as a substitute for the code. At the time of printing, the commentary reflects the most up-to-date text of the BOCA National Mechanical Codell993. A list of
13、all errata to the BOCA National Mechanical Code11993 is published annually in the BOCA magazine. The Commentary should not be adopted as a code by a governmental jurisdiction. The illustrations should be viewed as advisory by providing assistance in interpreting the code. They do not necessarily ill
14、ustrate the only method of achieving code compliance. It is also important to explain that the commentary is advisory only, and that the code official alone possesses the authority and responsibility for interpreting the code. The format of the commentary includes the full text of each section, tabl
15、e and figure in the code, followed immediately by the commentary applicable to that text. Code text and commentary text are easily distinguished from each other. All code text is either fully shaded or surrounded by a shaded border, and all commentary text is unshaded and begins with the symbol . De
16、veloping and publishing a document such as this is a major undertaking and requires the technical expertise of a great number of people. The contributors are, of course, the source of the substance of this work, with a great deal of reliance on decades of code interpretations, code change documentat
17、ion, interpretation activity, committee minutes and membership correspondence. The caliber of contributions has ensured value to the work. We hope readers will find this Commentary to be a reliable source of information that will help effectively and efficiently enforce the provisions of the BOCA Na
18、tional Mechanical Codell993. Comments and recommendations are encouraged, for through your input, we can improve future editions. Please direct your comments to BOCA Headquarters. Paul K. Heilstedt, P.E. Executive Director BOCA International, Inc. Ni Copyright Building Officials and Code Administrat
19、ors International Inc. Provided by IHS under license with BOCA Not for Resale No reproduction or networking permitted without license from IHS -,-,- 9008479 0005382 09T TABLE OF CONTENTS Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 C
20、hapter 12 Chapter 13 Chapter 14 Chapter 15 Chapter 16 Chapter 17 Chapter 18 Chapter 19 Chapter 20 Chapter 21 Appendix A Appendix B ADMINISTRATION DEFINITIONS AIR DISTRIBUTION SYSTEMS MECHANICAL EQUIPMENT KITCHEN EXHAUST EQUIPMENT BOILERS AND WATER HEATERS HYDRONIC PIPING GAS PIPING SYSTEMS FLAMMABLE
21、 AND COMBUSTIBLE LIQUID STORAGE AND PIPING SYSTEMS COMBUSTION AIR CLEARANCE REDUCTION CHIMNEYS AND VENTS MECHANICAL REFRIGERATION FIREPLACES, SOLID FUEL-BURNING AND GAS ACCESSORY APPLIANCES I N C I N ERATORS AN D C R E MATO RI ES VENTILATION AIR AIR QUALITY SOLAR HEATING AND COOLING SYSTEMS EN E RGY
22、 CON SE RVATI ON BOILERS AND PRESSURE VESSELS, MAINTENANCE AND INSPECTION REFERENCED STANDARDS DEGREE DAY AND DESIGN TEMPERATURE TABLE REFRIGERANTS AND PIPE EXPANSION 1-1 - 1-18 2-1 - 2-7 3-1 - 341 4-1 -4-20 5-1 - 5-21 6-1 - 6-14 7-1 - 7-21 8-1 -8-34 9-1 - 9-18 10-1 - 10-11 11-1 - 11-9 12-1 - 12-48
23、13-1 - 13-24 14-1 - 14-15 15-1 - 15-29 16-1 - 16-17 17-1 - 17-4 18-1 - 18-8 19-1 - 19-21 20-1 -204 21-1 - 21-6 A -1 - A-3 B-1 - B-1 V Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not for Resale No reproduction or networking permitted
24、 without license from IHS -,-,- m 9008479 0005383 T2b m EDITORIAL CHANGES - SECOND PRINTING pg. 3-24, Figure M-308.1.1: figure has been revised. pg. 4-17, Figure M-407.2( 1): callout reading “Greater than 24-0“ now reads . . . Greater than 24“. pg. 9-12, Section M-908.4: second line of commentary se
25、ction now references Section 3107.0. pg. 12-23, Figure M-1207.3: figure has been revised. Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not for Resale No reproduction or networking permitted without license from IHS -,-,-9008479 00053
26、84 962 Chapter 1: Administration Abstract This chapter contains provisions for the application, enforce- ment and administration of subsequent requirements of this code. In addition to establishing the scope of the code, Chapter 1 identifies which mechanical equipment, appliances and sys- tems come
27、under its purview. Sections M-101.0 and M-102.0 establish the scope and applicability of the code and address existing equipment and systems. Section M-103.0 addresses existing mechanical systems and the repair and maintenance thereof. Section M- 104.0 establishes the validity of the code and its re
28、lation to other laws, statutes and ordinances. Sections M-105.0 and M-106.0 state the duties, rights and responsibilities of the code official and the mechanical inspec- tion department. Seclion M- 107.0 establishcs the approval authority of the code official and the mcchanical inspection department
29、, including the right to make modifications to code provisions and to approve alternative materials and uscd materials. Sections M-108.0 and M-109.0 deal with the administrative aspccts of code enforcernent relative to permit application and issuance. Sections M-i 10.0 and M-111.0 address the demoli
30、tion and relocation of existing structures. Section M-112.0 sets forth the conditions of a permit relative to code compliance. Section M- 11 3.0 addrcsses permit fees. Section M-114.0 ad- dresses the required inspections, the procedures for such inspec- tions, and the rights and responsibilities of
31、the code officiai. Section M-115.0 pertains to the execution of work as it may affect code compliance. Section M- i 16.0 establishes what con- stitutcs a violation of the code and what actions are to be taken by the code official and the violator. Section M-117.0 establishcs the stop work order proc
32、edure. Section M- 11 8.0 sets forth the approval procedures upon com- pletion or near completion of work. Section M- 1 19.0 addresses the identification and abatement of unsafe existing conditions relative to mechanical equipment and systems. Section M-120.0 gives the code official the authority to
33、vacate buildings under emergency conditions war- ranting such action. Section M- 12 I .O provides the due process provisions of the code for building owners by establishing an appeals process that must be exhausted prior to civil action. Keywords Addition, Alteration, Approval, Approved Agency, Appr
34、oved Material, Approved Rules, Certificate of Occupancy, Code Of- ficial, Construction Documents, Emergency Measures, Equip- ment and Methods, Fees, Inspections, Jurisdiction, Occupancy, Permit, Posted Sign, Registered Design Professional, Stop Work Order, Structure (Existing), Tests, Unsafe Conditi
35、ons, Viola- tions, Workmanship, Written Noticc, Zoning. Purpose A mechanical code cannot be effective without adequate provisions for its administration and enforcement. The official charged with the administration and enforcement of mcchanical regulations has a great responsibility, and with this r
36、esponsibility goes authority. No matter how detailed the mechanical code may be, the code official must, to some extent, excrcise judgement in determining compliance with the code. The code official has the responsibility to ensure that the homes in which the citizens of the community reside and the
37、 buildings in which they work are designed and constructed to be reasonably free from hazards associated with the presence and utilimtion of mechanical equip- ment, appliances and systems. The code intends to establish a minimum acceptable level of safety. General Comments The law of building regula
38、tion is grounded on the police power of thc state. This police power is the source of all authority to enact building regulations. In terms of how it is used, police power is the power ol the state to legislate for the general welfare of its citizens. This power enables passage of such laws as a mec
39、hanical code. It is from the police power delegated by the state legislature that local govern- ments are able to enact building regulations. If the mte legisla- ture has limited this power in any way, the municipality may not exceed these limitations. While the municipality may not furthcr delegate
40、 its police power (e.g., by delegating the burden of determining code com- pliance to the building owner, contractor or architect), it may turn over the administration of building regulations to a municipal official such as a code official, provided that sufficient criteria are given the code offici
41、al to establish clearly the basis for decisions as to whether or not a proposed building, including its mechanical systems, conforms to the code. Chapter 1 of the code is largely concerned with maintaining “due process of law” in enforcing the performance criteria contained in the body of the code.
42、Only through careful obser- vation of the administrative provisions can the code official reasonably hope to demonstrate that “equal protection under the law” has been provided. 1-1 Copyright Building Officials and Code Administrators International Inc. Provided by IHS under license with BOCA Not fo
43、r Resale No reproduction or networking permitted without license from IHS -,-,- I 4008479 0005385 8T = THE BOCA NATIONAL MECHANICAL CODE/1993 COMMENTARY SEM1OW M-101 .O GENERAL H This section sets forth the scope and intent of the code as it applies to new and existing structures. M-101.1 Title: The
44、se regulations shall be known as the Mechanical Code of NM OF JURWXTK?N hereinafiar referred to as “this code.” H The purpose of this section is to insert the name of the adopting jurisdiction into the code. M-1432.1 General: fhe provisions of however, it does imply (through examples) that the scope
45、 of the code is primarily focused on heating, ventilating and air conditioning (HVAC) systems, those items specifically addressed in the code and those building “service” items that make a building occupi- able with respect to comfort, function and safety. All mechanical equipment and systems which
46、are specifically intended, designed and necessary for the general safety and well being of the occupants of a building are intended to be governed by the code. The code intends to regulate any and all equipment and appliances that can affect the health, safety and welfare of building occupants insof
47、ar as the occupants are affected by the installation, operation and maintenance of such equipment and appliances. M-lOJ Went: mis code shall be con expressed intent, which is welfare insofar as they ase maintenance of mechanical. sysrem H The intent of the code is to set forth requirements that esta
48、b- lish the minimum acceptable level of public health, safety and welfare. The intent becomes important in the application of such sections as Sections M-103.0, M-106.6, M-107.4, M-115.0 and M-119.0 as well as any enforcement-oriented interpretive action or judgement. H This section sets forth the a
49、dministrative provisions for ap- plying the code to various conditions related to the installation and use of new and existing mechanical systems. H An existing mechanical system is generally considered to be “grandfathered” with code adoption, provided that the system meets a minimum level of safety. Frequently the criteria for this level are the regulations (or code) under which the existing building was originally constructed
