1、21 September 1983 SUPERSEDLNG ANSL Al 12.21 2- 1971 14 December 1982 ACCEPTANCE NOTLCE This non-government document was adopted on 21 September 1983 and is approved for use by the DoD. clearance required by existing regulations. Copies of the document are stocked by DoD Single Stock Point, Naval Pub
2、lications and Forms Center, Philadelphia, PA 19120, for issue to DoD activities only. Contractote and industry groupe must obtain copies from ANSL, 1430 Broadway, New York, NY 10018 The indicated industry group has furnished the Title OP Document: American National Standard Roof Drains Date of Speci
3、fic Iesue Adopted: July 31, 1983 Releasing Industry Group: American Society of Mechanical Engineers NOTICE: When reaffirmation, amendment, revision, or cancellation of this etandard ie initially proposed, the industry group reeponsible for this standard shall inform the military coordinating activit
4、y o the proposed change and request participation. Custodians: Army - ME Navy - YD Air Force - 99 Review activity: DU - CS User activity: Army - CE Navy - MC THIS DOCUMENT CONTAINS / PAGES. Military Coordinating Activity: Navy - YD Project No. 4510-0214 Copyright ASME International Provided by IHS u
5、nder license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,- t-LB-33 AMERICAN NATIONAL STANDARD Roof Drains ANSI A112.21.2-M - 1983 (REVISION OF ANSI A112.21.2-1971) PUBLISHED BY THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 Eas
6、t 47th Street New York, N.Y. 10017 Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME A332*23-2M 83 2575532 0008037 2 W Date of Issuance: July 31, 1983 This code or standard was developed under pro
7、cedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made availab
8、le for public review and comment which provides an opportunity for additional public input from industry, academia, regulatory agen- cies, and the public-at-large. ASM E does not “approve,“ “rate,“ or endorse“ any item, construction, proprietary device, or activity. ASME does not take any position w
9、ith respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, not assume any such liability. Users of a code or stand
10、ard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Participation by federal agency representative(s) or personis) affiliated with industry is not to be interpreted as government or
11、 industry endorsement of this code or standard. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Copyright 1983 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in
12、 U.S.A. Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ASME A332*23.2M 83 2575532 O008040 7 FOREWORD (This Foreword is iiot part of American National Standard, Roof Drains, ANSI Al 12.21.2M-1983.) R
13、ainwater was prevented from accumulating on the roofs of the first buildings by pitching the roof to allow the water to flow off. The first means to collect and control rain runoff was to provide a gutter that ran the length of the low roof section. All of the water drained to the gutter, which in t
14、urn sloped to an outside downspout pipe, This was followed by the develop- ment of inside downspouts because of the unsightly appearance of the outside downspouts on many buildings. The first inside downspout consisted of a sheet metal sump below the roof surface covered by a wire screen to keep out
15、 debris. Later, the screen was replaced by a flange and dome-basket arrangement. The first development in a roof drain, as we know it today, was a cast metal downspout head consisting of an increaser that was screwed onto the downspout pipe with a cast iron dome bolted to this increaser. The problem
16、 of leakage around the downspout head between the head and the roofing material prompted the development of a clamp device to secure the roof flash- ing to the head, creating the first modern roof drain. There followed a series of designs of roof drains incorporating the beehive or mushroom dome, no
17、n-puncturing flashing clamp device with integral gravel stop, promenade tops, deep sump drain bodies, expansion joints, and other variations in design to facilitate installation and to control the rainwater runoff. USA Standards Committee Al 12 was organized July 27, 1955, for the standardization of
18、 plumbing materials and equipment. The first organizational meeting was held on July 22, 1958. At a meeting on May 1, 1964, Panel No, 21 was created to establish standards on roof drains and floor drains. Its scope was as follows: The recommendation of suitable existing standards in cooperation with
19、 interested sponsors or the development of adequate new standards as are needed for roof drains and floor drains as used or installed in plumbing systems. Prior to the establishment of this Panel, the Plumbing and Drainage Institute started a stan- dardization study on September 15, 1961. The PDI is
20、 an organization of manufacturers of drainage products. They realized the need for roof drain standards and therefore conducted the study. The Institutes Executive Secretary acted as Chairman and the Engineers from the participat- ing member companies were a part of the committee. During the period
21、from September 15, 1961 to September 1963, the group formulated some basic drain standards and specifications. Though this information was never published, it is used as a basis for this Standard. Engineer members of the Plumbing and Drainage Institute were appointed to the Task Force on Panel No. 2
22、1. The first meeting was held on February 2, 1966. A rough draft of this Stan- dard was submitted on May 18, 1966 to the Task Force members. The Task Force met again on July 21, 1966 to review the second draft. Revisions were made and the proposed standard was submitted to members of Panel No. 2 1.
23、Following approval of the proposal by the Panel, the American National Standards Commit- tee Al 12 and the sponsor, the American National Standards Institute approved it on July 27, 1971. This Standard was revised and approved by Panel 21, the Al 12 Standards Committee and Secretariat. Subsequently
24、this modified version was adopted by the American National Stan- dards Institute on March 7, 1983. iii Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMERICAN NATIONAL STANDARDS COMMITTEE A112 Stand
25、ardization of Plumbing Materials and Equipment (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS J. C. Church, Chairman C. E. Lynch, Secretary COMMITTEE PERSONNEL AIR CONDITIONING AND REFRIGERATION INSTITUTE L. P. Benua, EBCO Manufacturing Company, Col
26、umbus, Ohio R. J. Denny, Alternate, Air Conditioning and Refrigeration Institute, Arlington, Virginia AMERICAN IRON AND STEEL INSTITUTE G. T. Rochford, Ji., American Iron and Steel Institute, Washington, D.C. B. J. Enright, Alternate, Field Representative, Raytown, Missouri AMERICAN SOCIETY OF MECHA
27、NICAL ENGINEERS R. V. Eenazzi, Juros, Baum and Bolles, New York, New York THE AMERICAN SOCIETY OF PLUMBING ENGINEERS D. F. Dickenon, Donald F. Dickercon Associates, Van Nuys, California A. J. Morales, Alternafe, American Society of Plumbing Engineers, Sherman Oaks, California AMERICAN SOCIETY OF SAN
28、ITARY ENGINEERING J. C. Church, Mamaroneck, New York G. R. Jerus, Alternate, Meyer, Strong and Jones, New York, New York L. M. Reading, Alternate, ASSE Representative, Detroit, Michigan ASSOCIATION OF ASBESTOS CEMENT PIPE PRODUCERS T. R. Gillen, Asbestos Cement Pipe Producers Association, Arlington,
29、 Virginia ASSOCIATION OF HOME APPLIANCE MANUFACTURERS R. Kerr, KitchenAid Division, Hobart Mfg., Troy, Ohio W. Blanck, Alternate, Association of Home Appliance Manufacturers, Chicago, Illinois BUILDING OFFICIALS AND CODE ADMINISTRATORS INTERNATIONAL D. P. Jack, Hampton, Virginia J. A. Ballanco, Alte
30、rnate, Building Officials and Code Administrators International, Homewood, Illinois CAST IRON SOIL PIPE INSTITUTE J. A. Woodward, Apple Valley, California CONFERENCE OF STATE SANITARY ENGINEERS C. C. Crurnley, Michigan Department of Public Health, Lansing, Michigan COPPER DEVELOPMENT ASSOCIATION, IN
31、C. A. Cohen, Standards and Safety Engineering Copper Development Association, Inc., New York, New York INTERNATIONAL ASSOCIATION OF PLUMBING AND MECHANICAL OFFICIALS N. J. Latter, International Association of Plumbing and Mechanical Officials, Los Angeles, California V Copyright ASME International P
32、rovided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,- A G NE A112.21 2M 83 2595532 0008 LEAD INDUSTRIES ASSOCIATION E. D. Martin, Lead Industries Association, New York, New York MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND F
33、ITTINGS INDUSTRY C. S. Anning, Elcen Metal Products, S. Melroce Park, Illinois NATIONAL ASSOCIATION OF HOME BUILDERS C. D. Goines, National Association of Home Builders, Washington, D.C. M. M. Mintz, Alternate, National Association of Home Builders, Washington, D.C. NATIONAL ASSOCIATION OF PLUMBING-
34、HEATING-COOLING CONTRACTORS R. E. White, National Association of Plumbing-Heating-Cooling Contractors, South Bend, Indiana NATIONAL CLAY PIPE INSTITUTE R. M. Clementson, National Clay Pipe Institute, Washington, D.C. NATIONAL ENVIRONMENTAL HEALTH ASSOCIATION G. A. Prince, Denver, Colorado NATIONAL S
35、ANITATION FOUNDATION T. S. Gable, National Sanitation Foundation, Ann Arbor, Michigan PLUMBING AND DRAINAGE INSTITUTE A. O. Roche, Jr., Plumbing and Drainage Institute, Indianapolis, Indiana PLUMBING MANUFACTURERS INSTITUTE C. Selover, Travelers Rest, South Carolina R. W. Church, Alternate, Plumbing
36、 Manufacturers Institute, Glen Ellyn, Illinois SOCIETY OF THE PLASTICS INDUSTRY S. Mruk, New Providence, New Jersey STATE OF NEW YORK HOUSING AND BUILDING CODES BUREAU A. Y. Kaplan, New York State Housing and Building Codes Bureau, New York, New York U.S. DEPARTMENT OF AGRICULTURE E. E. Jones, Jr.,
37、U.S. Department of Agriculture, Clemson, South Carolina U.S. DEPARTMENT OF COMMERCE - NATIONAL BUREAU OF STANDARDS L. S. Galowin, National Bureau of Standards, Washington, D.C. U.S. DEPARTMENT OF DEFENSE M. E. Carr, U.S. Department of Defense, Washington, D.C. U.S. DEPARTMENT OF THE NAVY R. Cuendet,
38、 U. S. Naval Facilities Engineering Command, Alexandria, Virginia INDIVIDUAL MEMBERS R. S. Wyiy, Kensington, Maryland L. S. Nielson, Fresh Meadows, New York P. J. Higgini, P. J. Higgins and Associates, Mt. Airy, Maryland Copyright ASME International Provided by IHS under license with ASMENot for Res
39、aleNo reproduction or networking permitted without license from IHS-,-PERSONNEL OF PANEL 21 - ROOF DRAINS, FLOOR DRAINS, AND OTHER DRAINS A. O. Roche JI., Chairman, Plumbing and Drainage Institute, Indianapolis, Indiana W. W. White, Secretary, White Plumbing and Heating Company, Detroit, Michigan J.
40、 C. Church, Marnaroneck, New York G. J. Flegel, Michigan City, Indiana M. W. Marshall, Tyler, Texas J. M. Soriano, Scotch Plains, New Jersey Vii Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-CONTEN
41、TS Foreword iii Standards Committee Roster . v 1 ScopeandPurpose 1 4 Outlet Types and Connections 4 Top Size . Dome or Grate Free Area 2 Definitions . 1 3 Nomenclature . 1 5 4 6 Materials . 4 7 Finishes . 6 8 Accessories . 7 Figures 1 General Purpose Roof Drain 2 Gutter or Cornice Roof Drain . 2 3 P
42、arapetRoofDra in 3 4 Promenade or Deck Roof Drain 3 2 5 Bottomoutlet . 4 6 Sideoutlet . 4 7 45Deg.SideOutlet 4 8 Accessories for Drains 7 Tables 1 Minimum Dimensions for Threaded Outlet Connections 5 2 Minimum Dimensions for inside Caulk Outlet Connections 5 3 Minimum Dimensions for Hub Outlet Conne
43、ctions . 5 4 General Purpose Roof Drain 6 5 Gutter or Cornice Roof Drain . 6 6 Parapet RoofDrain 6 7 Promenade or Deck Roof Drain 6 ix o Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-ANSI A112.21.2
44、M-1983 AMERICAN NATIONAL STANDARD ROOF DRAINS 1 SCOPE AND PURPOSE 1.1 Scope 1.1.1 Development of standards for roof drains including general purpose, gutter and cornice, parapet and promenade or deck types, which convey rain- water from the roof area of building structures. 1 .I .2 This Standard cov
45、ers: (a) Definitions (b) Nomenclature (c) Outlet Types and Connections (d) Top Size - Dome or Grate Free Area (e) Materials and Finishes cf) Accessories 2.2 Types 2.2.1 General Purpose Roof Drain. A roof drain for installation in any roof area excluding the parapet of the roof structure. 2.2.2 Gutte
46、r or Cornice Roof Drain. A roof drain for installation in gutters, cornices, balconies and other overhanging construction to prevent overflow to areas below, 2.2.3 Parapet Roof Drain. A roof drain for instal- lation in parapets for conveying rainwater from a roof area through the parapet. 2.2.4 Prom
47、enade or Deck Roof Drain. A roof drain for installation in roof decks subject to pedes- trian or vehicular traffic. 1.2 Purpose The purpose of this Standard is to supply plumbing code authorities and others with full knowledge of the minimum design and quality criteria for roof drains. It is not int
48、ended for use as a specification guide. CAUTION: Illustrations bcluded in this Standard are in- tended oniy to describe and portray typical roof drain types and are not intended to restrict design or to be used for speci- fication purposes. 2.3 Dome or Grate Free Area Total area of drainage openings
49、 in the dome or grate. 2.4 Conductor A pipe inside the building which conveys storm water from the roof to a storm or combined building drain. 2 DEFINITIONS 2.1 General 2.5 Leader An exterior drainage pipe for conveying storm A roof drain is a manufactured receptacle designed to receive and convey rainwater from roof areas to water from roof or gutter the drainage system. Roof drains are available in vari- ous designs, shapes, sump depth
