1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 790 Standard Test Methods for Fire Tests of Roof CoveringsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NO
2、T AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Standard Test Methods for Fire Tests of Roof Coverings, UL 790 Eigth Edition, Dated April 22, 2004 Summary of Topics These revisions to ANSI/UL 790 include the following changes in requirement
3、s: 1. Revisions to the Scope to clarify that the standard covers relative re characteristics, so as not to be confused with the term “re resistance”. 2. Revisions to several sections covering a) the required number of assemblies to be tested and b) that the requirements shall be applied in sequence.
4、 3. Revisions that clarify sample preparation. 4. Addition of a new requirement covering conditioning of the self-sealing shingle test decks at a temperature of 135 to 140F (57 to 60C) for a continuous period of 16 hours. 5. Minor clarications and formatting revisions. 6. Revisions to clarify that t
5、he spread of ame observations are made during the test, not after the test has ended. 7. Revisions of the burning-brand test covering the placement of the Class A and Class B brands. 8. Revisions to the test report to require that the climactic conditions for the weathering exposure shall be reporte
6、d. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on
7、 which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated September 27, 2013 and May 16, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmit
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9、ny purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative
10、has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. JULY 29, 2014 UL 790 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMIS
11、SION FROM UL Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser
12、is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. Th
13、e prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. JULY 29, 2014 UL 790 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
14、FROM UL APRIL 22, 2004 (Title Page Reprinted: July 29, 2014) 1 UL 790 Standard for Standard Test Methods for Fire Tests of Roof Coverings The rst through seventh editions were titled Tests for Fire Resistance of Roof Covering Materials. First Edition September, 1958 Second Edition April, 1969 Third
15、Edition May, 1973 Fourth Edition December, 1978 Fifth Edition October, 1983 Sixth Edition October, 1995 Seventh Edition September, 1997 Eighth Edition April 22, 2004 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through July 29, 2014. The most recent designation
16、 of ANSI/UL 790 as an American National Standard (ANSI) occurred on July 29, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. The Department of Defense (DoD) has adopted UL 790 on March 21, 1984. The publication of revi
17、sed pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS)
18、at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UN
19、DERWRITERS LABORATORIES INC. ANSI/UL 790-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTH
20、ER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Units of Measurement .5 PERFORMANCE 3 General 5 4 Preparation of Samples 5 4.1 General .5 4.2 Intermittent-ame, burning-brand, and ying-brand test decks 6 4.3 Spread-of-ame test decks .12 4.4 Application .1
21、4 4.5 Conditioning 15 5 Test Apparatus and Set-Up Intermittent-Flame, Spread-of-Flame, Burning-Brand, and Flying-Brand Tests .16 6 Intermittent-Flame Test .18 7 Spread-of-Flame Test 18 8 Burning-Brand Test .18A 8.1 General .18A 8.2 Size and construction of brands 18A 8.3 Ignition of brands 18B 8.4 T
22、est conditions 19 8.5 Duration of test 22 8.6 Observations .22 9 Flying-Brand Test 23 10 Rain Test 23 11 Weathering Test 24 CONDITIONS OF ACCEPTANCE 12 General 24 13 Report .25 JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F
23、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover the measurement of the relative re characteristics of roof coverings exposed to simulated re sources originating from outside a building on which the coverings are installed. They are app
24、licable to roof coverings intended for installation on either combustible or noncombustible roof decks (see 1.7) when the roof coverings are applied as intended. 1.1 revised July 29, 2014 1.2 Three classes of re exposure are described. 1.3 Class A roof coverings are effective against severe re test
25、exposures. Under such exposures, roof coverings of this class afford a high degree of re protection to the roof deck, do not slip from position, and are not expected to produce ying brands. 1.4 Class B roof coverings are effective against moderate re test exposures. Under such exposures, roof coveri
26、ngs of this class afford a moderate degree of re protection to the roof deck, do not slip from position, and are not expected to produce ying brands. 1.5 Class C roof coverings are effective against light re test exposures. Under such exposures, roof coverings of this class afford a light degree of
27、re protection to the roof deck, do not slip from position, and are not expected to produce ying brands. 1.6 Tests conducted in accordance with these requirements are intended to demonstrate the performance of roof coverings during the types and periods of re exposure involved, but are not intended t
28、o determine the acceptability of roof coverings for use after exposure to re. These re test methods do not provide a basis to compare expected performance under all actual re conditions but they do provide a basis for comparison of the response of roof coverings when subjected to re sources that are
29、 described herein. 1.7 A combustible deck is formed of wood sheathing boards, oriented strand boards (OSB), or plywood. A noncombustible deck is formed of metal, concrete, or poured gypsum. 1.7 revised July 29, 2014 JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 4UL CO
30、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. PERFORMANCE 3 General 3.1 Representative samples o
31、f a roof covering material, assembled to test decks as described in Section 4, are to be subjected to the applicable tests described in Sections61 1a sspecied in Table 3.1. Table 3.1 Required tests and test assemblies Material to be tested Required number of test assemblies a Intermittent- ame test,
32、 Spread-of- ame test, Burning- brand test, Flying-brand test, Rain test, Weathering test, Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Other than wood shakes or shingles, for installation on: A. Combustible decks: 1. Class A 2 2 4 NA NA NA 2. Class B or C 2 2 2 NA NA NA B. Noncombus
33、tible decks only N A2N AN AN AN A Wood shakes and shingles b : A. Class A 3 (2) 5 3 6 (2) 5 3 (2) 5 6 15 B. Class B or C 3 (2) 5 3 3 (2) 5 3 (2) 5 6 15 a NA Test is not required. b Number in parentheses is number of samples from Rain Test, Section 10, to be tested. Number in brackets is number of sa
34、mples from Weathering Test, Section 11, to be tested. 4 Preparation of Samples 4.1 General 4.1.1 Representative samples of a roof covering material are to be applied, as described in 4.4, to test decks constructed in accordance with the applicable requirements of 4.2.1 4.3.2. The assemblies are to b
35、e conditioned in accordance with 4.5 prior to testing. 4.1.1 revised July 29, 2014 JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2 Intermittent-ame, burning-b
36、rand, and ying-brand test decks 4.2.1 Except as indicated in 4.2.2 4.2.5, the test deck for the Intermittent-Flame Test, Section 6, and the Burning-Brand Test, Section 8, is to be 3-1/3 feet (1 m) wide by 4-1/3 feet (1.3 m) long and is to be made of kiln-dried No. 1 white pine lumber with not less t
37、han 8 nor more than 12 percent moisture content. The lumber is to be free from large or loose knots, sapwood, rot, or pitch pockets, and is to contain no edge knots. Individual deck boards are to be of nominal 1 by 8 inch (19.1 by 184 mm) lumber (dressed on four sides). If used for the Class C burni
38、ng brand test, see 8.4.3.1 8.4.5.1, the width of the deck board is to be such that the brands will be located directly over the spaces between the boards. The deck boards are to be laid across the shorter dimension of the test deck, spaced 1/4 inch (6.4 mm) apart, and securely nailed to two nominal
39、2 by 4 inch (38 by 89 mm) wood battens located under and ush with the outer edges of the deck. Decks so constructed are to be even and uniform. Figures 4.1 and 4.2 illustrate the construction details of these decks. 4.2.1 revised July 29, 2014 This is generated text for gtxt. Figure 4.1 Intermittent
40、-ame and burning-brand pine board deck JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.2 For the Intermittent-Flame Test, Section 6, Burning-Brand Test, Secti
41、on 8, and Flying-Brand Test, Section 9, on treated wood shingles and shakes, the test decks are to be constructed of nominal 1 by 4 inch (19.1 by 89 mm) lumber (dressed on four sides), spaced 1-1/2 inches (38.1 mm) apart, and securely nailed to two nominal 2 by 4 inch (38 by 89 mm) wood battens. The
42、 lumber is to be of the quality specied in 4.1.1. Figure 4.3 illustrates the construction details of this deck. This is generated text for gtxt. Figure 4.2 Class C burning brand deck with 3/4 inch pine boards APRIL 22, 2004 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 7UL COPYRIGH
43、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.3 For roof coverings investigated as applied to other decks, the minimum thickness shall be specied by the test sponsor and noted in the Report. Plywood, if used, shall be type A-C grade, Group 1, ext
44、erior with face and back veneers of Douglas r marked as conforming to DOC PS1 for soft plywood. Oriented Strand Board (OSB), if used shall be marked as conforming to DOC PS2. These plywood decks are to have 1/8 inch (3.2 mm) vertical and horizontal joints, and all vertical joints are to be centered
45、on nominal 2 by 4 inch (38 by 89 mm) wood battens. See 4.2.4 and 4.2.5. When recommended by the test sponsor the battens shall also be used for horizontal joints. 4.2.3 revised July 29, 2014 4.2.4 A plywood or OSB deck to be used for the intermittent ame test is to have a horizontal joint 8 inches (
46、200 mm) from and parallel to the 3-1/3 foot (1.02 m) long leading edge. In addition, a vertical joint that is centered on the deck and extends from the leading edge of the deck to the horizontal joint is to be provided. 4.2.4 revised July 29, 2014 This is generated text for gtxt. Figure 4.3 Intermit
47、tent-ame, burning-brand and ying-brand deck for use with wood shingles and shakes JULY 29, 2014 STANDARD TEST METHODS FOR FIRE TESTS OF ROOF COVERINGS - UL 790 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.5 A plywood or OSB deck to b
48、e used for a Class A or B burning-brand test is to be provided with a horizontal joint that is 22-1/2 inches (572 mm) from, and parallel to, the leading edge of the deck. A deck to be used for a Class A test is to have a vertical joint centered on the deck and extending above the horizontal joint. A
49、 deck to be used for a Class B test is to be provided with two vertical joints, extending above the horizontal joint, and each located 10 inches (254 mm) from and parallel to the side edges of the deck. A plywood deck to be used or a Class C burning-brand test is to have ve horizontal joints, with at least 1/8 inch (3.2 mm) spacing between joints in the plywood. Figures 4.5 4.7 illustrate the construction details of these decks. 4.2.5 revised July 29,
