1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1256 Fire Test of Roof Deck ConstructionsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
2、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fire Test of Roof Deck Constructions, UL 1256 Fourth Edition, Dated October 31, 2002 Summary of Topics Revision pages dated July 17, 2013 were issued to incorporate the following changes in requirements: Clari
3、cation of 1.5 Regarding the Development of the Conditions of Acceptance Clarication of 15.2 that Melting Thermal Plastic Insulation is Not Prohibited 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 requ
4、irements 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 which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated July 20
5、, 2012. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind
6、, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any 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 da
7、mages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative 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. U
8、sers 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 is storing an
9、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. The prior text f
10、or 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 17, 2013 UL 1256 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY
11、17, 2013 UL 1256 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 31, 2002 (Title Page Reprinted: July 17, 2013) HISTORICAL NOTE In August, 1953 the General Motors thirty-ve acre Hydro-Matic factory at Livonia,
12、 Michigan was destroyed by re. Unprotected steel construction and the thin steel deck which permitted the asphalt built-up roof covering to melt, drip through joints, and thereby contribute to re spread within the building was one of the factors cited as being responsible for the extent of the loss.
13、 As a means to analyze the potential for contribution of roof covering materials to re spread within a building, a 20 by 100 foot test structure was constructed. This analysis consisted of a series of ve large scale re tests utilizing different roof deck constructions, one of which represented the r
14、oof deck construction used in the General Motors factory. Based upon these large scale re tests, a roof deck construction evaluated for the purpose of establishing limits for underdeck re spread consisted of a steel roof deck, without vapor retarder or adhesive, insulated with 1-inch thick plain veg
15、etable berboard mechanically attached and covered with a 4-ply asphalt built-up roof covering with gravel surfacing. Based on the time and expense associated with conducting the large scale re test described in Part I of this Standard, UL investigated the use of a small scale re test method to corre
16、late the results of the small scale re test to the results of the large scale re test method. The small scale re test method developed from this correlation utilized the Steiner tunnel test chamber described in Part II of this Standard. Since the severity of the re exposure in the large scale re tes
17、t method introduces performance factors which cannot always be measured effectively in the small scale re test method described in Part II, subsequent large scale re tests are conducted by UL on specic new types of roof deck constructions which are judged to require additional datum tests. 1 UL 1256
18、 Standard for Fire Test of Roof Deck Constructions First Edition January, 1985 Second Edition August, 1993 Third Edition March, 1998 Fourth Edition October 31, 2002 This ANSI/UL Standard for Safety consists of the Fourth edition, including revisions through July 17, 2013. The most recent designation
19、 of ANSI/UL 1256 as an American National Standard (ANSI) occurred on July 17, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. ANSI/UL 1256-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU
20、TION WITHOUT PERMISSION FROM UL The Department of Defense (DoD) has adopted UL 1256 on August 19, 1989. The publication of revised 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 a
21、ny time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) 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 cop
22、yrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Gen
23、eral 6 2.1 Units of measurement .6 2.2 Undated references .6 PART I LARGE SCALE FIRE TEST METHOD FOR EVALUATION OF ROOF DECK CONSTRUCTIONS UNDER INTERIOR FIRE EXPOSURE 3 Test Method 6 4 Fire Test Structure 6 5 Fire Control Equipment 8 6 Instrumentation 12 7 Documentation 13 8 Test Procedure 13 9 Con
24、ditions of Acceptance .14 10 Test Report 15 PART II SMALL SCALE FIRE TEST METHOD UTILIZING STEINER FIRE TEST CHAMBER 11 Fire Test Chamber 15 12 Calibration of Test Equipment 19 13 Test Method .24 14 Test Assembly .25 15 Conditions of Acceptance 28 16 Test Report 29 JULY 17, 2013 FIRE TEST OF ROOF DE
25、CK CONSTRUCTIONS - UL 1256 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL This page intentionally left blank. JANUARY 12, 2007 FIRE TEST OF ROOF DECK CONSTRUCTIONS - UL 1256 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
26、OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover re test methods to evaluate the performance of metallic and nonmetallic roof deck constructions subjected to internal (under deck) re exposures for the purpose of determining the contribution of the roof cov
27、ering material, insulation, and other components of the roong system to the spread of re within a building. As the extent of ame propagation, thermal degradation, and combustive damage are determined after roof deck constructions are exposed to controlled re conditions, these requirements are not in
28、tended for use in describing or dening the re hazard or risk of re under actual re conditions. 1.2 These requirements do not include tests to evaluate other potential hazards to roof deck constructions, such as structural integrity under re exposure or wind uplift. 1.3 Two re test methods are descri
29、bed in Parts I and II of this Standard. One of these test methods shall be selected based on assessment of re test experience, as outlined in 1.4, 1.5 and 1.6. 1.4 Part I describes the large scale re test method used to evaluate roof deck constructions which by experience in actual installations wer
30、e known to have contributed extensively to underdeck re spread or, conversely, were regarded as being eligible for classication from this standpoint. 1.5 Part II describes the small scale re test method whereby the Steiner re test chamber is used to evaluate roof deck constructions for resistance to
31、 underdeck re spread. The conditions of acceptance under this test method were initially established by analysis of correlative data developed on a specic construction which exhibited adequate performance in the large scale re test method described in Part I. This construction consisted of a steel r
32、oof deck, without vapor retarder or adhesives, insulated with one inch thick plain vegetable berboard roof insulation mechanically attached and covered with a three ply bitumen built-up roof covering with gravel surface. Subsequent Part I large scale tests were conducted with other steel deck constr
33、uctions. These results continued to support the conditions of acceptance established for the Part II small scale tests. 1.5 revised July 17, 2013 1.6 For roof deck constructions dissimilar to any constructions previously evaluated under Part I, the large scale re test method is to be conducted. JULY
34、 17, 2013 FIRE TEST OF ROOF DECK CONSTRUCTIONS - UL 1256 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory o
35、r approximate information. 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. PART I LARGE SCALE FIRE TEST METHOD FOR EVALUATION OF ROOF DECK CONSTRU
36、CTIONS UNDER INTERIOR FIRE EXPOSURE 3 Test Method 3.1 The test method utilizes a 10 foot (3.1 m) high by 20 foot (6.1 m) wide by 100 foot (30.5 m) long structure which is open at one 20 foot (6.1 m) wide end (ue-end). At the opposite end (re end) is located an ignition source burner assembly consist
37、ing of atomized heptane pumped through two nozzles. An air supply to support combustion is produced by a blower and discharged into the structure at the re end. The fuel ow rate for this test was developed through preliminary trials to produce a re exposure condition within the rst 20 feet (6.1 m) o
38、f structure that is representative of the standard time-temperature curve in the Standard for Fire Tests of Building Construction and Materials, UL 263. Observations are recorded with respect to maximum underdeck ame spread within the structure, and with respect to the maximum ame spread on the top
39、surface of the structure. Temperature data is recorded at specied locations at intervals not to exceed 30 seconds throughout the entire test. Post test observations are also recorded with respect to the conditions of the structure and roof covering materials. The test is terminated after 30 minutes
40、elapsed time. 4 Fire Test Structure 4.1 The re test structure is to consist of a rectangular building 10 feet (3.1 m) high by 20 feet (6.1 m) wide by 100 feet (30.5 m) long with one 20 foot (6.1 m) long side left opened (ue-end). The walls are to be constructed from nominal 8 by 8 by 16 inch (203 by
41、 203 by 406 mm) concrete blocks. The space between the parapet wall, support wall and roof deck is to be tightly-packed with mineral wool insulation. The re end wall and rst 40 feet of each sidewall are to be protected from the oor to the underside of the roof deck on the interior by a nominal 1-inc
42、h (25 mm) thickness of spray or trowel applied cementitous mixture. The oor of the structure is to consist of concrete, crushed stone, or packed-soil covered with a 2-inch (50.8 mm) thickness of sand. The roof covering system is to have perimeter terminations and ashing construction that are represe
43、ntative of standard practice as specied by the roof covering material manufacturer. See Figure 4.1. This is generated text for gtxt. JULY 17, 2013 FIRE TEST OF ROOF DECK CONSTRUCTIONS - UL 1256 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM U
44、L 4.2 To facilitate observations, the ue-end of the structure is to have a breeching wall positioned transverse to and 4.5 0.5 feet (1.4 0.2 m) outward from the end of the 100 foot (30.5 m) long structure. The height of the breeching wall shall be at least 10 feet (0.9 m) and shall not exceed the he
45、ight of the roof structure by more than 3 feet (0.9 m). It is also required to further enclose the ue-end by extending the sides of the 100 foot (30.5 m) end of the structure to connect to the breeching wall. The entire overhead space enclosed within this extension beyond the end of the structure is
46、 to remain open to exhaust combustion products. See Figure 4.1. 4.3 Open view ports for observations during the re test are to be provided in both 100 foot (30.5 m) walls and spaced not greater than 10 feet (3.1 m) OC. These ports are to be a maximum of 1.5 square feet (1394 cm 2 ) and are to be of
47、such dimensions and elevation so that all underdeck and oor areas across the entire width and length of the structure are visible through one or both sides. 4.4 For structural steel roof deck constructions the purlins are to consist of a maximum M12 by 11.8 Jr. beams spaced 6 feet, 8 inches (2.0 m)
48、OC. The steel deck is to consist of No. 22 gage, 1-1/2 inch (38 mm) Type B decking. It is also not prohibited to use lesser mass Jr. beams or bar joist when the spacing is maintained at 6 feet, 8 inches (2.0 m) OC. 4.5 Other types of roof deck construction are to be constructed with structural suppo
49、rt, decking and roof covering systems representative of the construction under evaluation. Figure 4.1 Large scale test structure Note: Conversion Factors: 1 inch = 25.4 mm 1 foot = 0.3048 m OCTOBER 31, 2002 FIRE TEST OF ROOF DECK CONSTRUCTIONS - UL 1256 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.6 The roof covering materials system shall have perimeter terminations, parapets and ash
