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1、NFPA 256 Standard Methods of Fire Tests of Roof Coverings 1998 Edition National Fire Protection Association, 1 Batterymarch Park, PO Box 9101, Quincy, MA 02269-9101 An International Codes and Standards Organization Copyright National Fire Protection Association, Inc. One Batterymarch Park Quincy, Ma
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25、A Documents, which is available upon request from the NFPA.) ? 2561 Copyright 1998 NFPA, All Rights Reserved NFPA 256 Standard Tests of Fire Tests of Roof Coverings 1998 Edition This edition of NFPA 256, Standard Methods of Fire Tests of Roof Coverings, was prepared by the Technical Committee on Fir
26、e Tests and acted on by the National Fire Protection Association, Inc., at its Fall Meeting held November 1719, 1997, in Kansas City, MO. It was issued by the Standards Council on January 16, 1998, with an effective date of February 6, 1998, and super- sedes all previous editions. Changes other than
27、 editorial are indicated by a vertical rule in the margin of the pages on which they appear. These lines are included as an aid to the user in identifying changes from the previous edition. This edition of NFPA 256 was approved as an American National Standard on February 6, 1998. Origin and Develop
28、ment of NFPA 256 The test procedure covered by this standard was developed prior to 1920 by Underwriters Laboratories Inc. The test procedure was put in standard form by the E5 Committee on Fire Standards of the American Society for Testing and Materials, adopted by ASTM as a tentative standard in 1
29、955, and revised in 1956. It was adopted by the NFPA on May 22, 1958, on rec- ommendation of the Committee on Fire Tests and was subsequently published as NFPA 256, in May 1958. It was adopted by ASTM as a standard later in 1958 and published by ASTM as E 108-58. It was also published by Underwriter
30、s Laboratories Inc., as No. 790, September 1958. Revised NFPA editions were published in 1964, 1970, 1976, 1981, and 1987. The 1993 edition of NFPA 256 was revised editorially to bring this document into conformance with its ASTM and UL counterparts. The 1998 edition adds a new Chapter 13, “Report o
31、f Results.” This was done to clarify and to identify the required elements that relate to both specimen preparation and test results. ? 2562FIRE TESTS OF ROOF COVERINGS 1998 Edition Technical Committee on Fire Tests Jesse J. Beitel, Chair Hughes Assoc. Inc., MD SE April L. Berkol, ITT Sheraton Corp.
32、, NY U Rep. American Hotel for recommending the ap- plication of and advising on the interpretation of acceptable test standards for fire problems of concern to NFPA technical committees and members; and for acting in a liaison capacity between NFPA and the committees of other organizations writing
33、fire test standards. This Committee does not cover fire tests that are used to evaluate extin- guishing agents, devices, or systems. ? CONTENTS2563 1998 Edition Contents Chapter 1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 1-1Scope . . . . . . . . . . . . . . . . . . . . . .
34、 . . . . . . . . . 256 4 1-2Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 1-3 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 Chapter 2 Equipment and General Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . 256 4 2-1Apparatus . . .
35、 . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 2-2 Test Flame . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 2-3 Supply Air . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 Chapter 3 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . 256 4 3-1Air Current .
36、 . . . . . . . . . . . . . . . . . . . . . . . . . . 256 4 3-2Flame Temperature . . . . . . . . . . . . . . . . . . . . 256 5 3-3Rain Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 5 3-4Frequency of Calibration . . . . . . . . . . . . . . . 256 6 Chapter 4 Preparation of Test Speci
37、mens . . . . . . . . 256 6 4-1 Construction of Test Decks . . . . . . . . . . . . . . 256 6 4-2Application of Roofing on Test Roof Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 8 4-3 Storage and Conditioning of Test Roof Decks . . . . . . . . . . . . . . . . . . . . . . .
38、. . . . . . . . 256 8 Chapter 5 General Conditions . . . . . . . . . . . . . . . . . 256 8 5-1 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 8 5-2 Mortar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 8 5-3 Air Current . . . . . . . . . . . . . . . . . .
39、. . . . . . . . 256 8 5-4 Roof Coverings . . . . . . . . . . . . . . . . . . . . . . . 256 8 5-5 Built-up Coverings . . . . . . . . . . . . . . . . . . . . . 256 8 5-6 Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 Chapter 6 Intermittent Flame Exposure Test . . . . . 256
40、 9 6-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 6-2Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 6-3 Application of Flame . . . . . . . . . . . . . . . . . . . 256 9 6-4 Air Current . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 6
41、-5 Observations . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 Chapter 7 Spread of Flame Test . . . . . . . . . . . . . . . . 256 9 7-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 7-2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 7-3Applic
42、ation of Flame . . . . . . . . . . . . . . . . . . 256 9 7-4 Observations . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 Chapter 8 Burning Brand Test. . . . . . . . . . . . . . . . . . 256 9 8-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 9 8-2 Procedure . . . . .
43、. . . . . . . . . . . . . . . . . . . . . . 25610 8-3Size and Construction of Brands . . . . . . . . . 25610 8-4Ignition of Brands . . . . . . . . . . . . . . . . . . . . 25610 8-5Test Conditions . . . . . . . . . . . . . . . . . . . . . . 25610 8-6 Duration of the Test . . . . . . . . . . . . . . .
44、 . . . . 25611 8-7Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . 25611 8-8 Observations . . . . . . . . . . . . . . . . . . . . . . . . . 25611 Chapter 9 Flying Brand Test. . . . . . . . . . . . . . . . . . . . 25611 9-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . .
45、 . . 25611 9-2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 25611 9-3Application of Flame . . . . . . . . . . . . . . . . . . 25611 9-4 Air Current . . . . . . . . . . . . . . . . . . . . . . . . . . 25612 Chapter 10 Rain Test . . . . . . . . . . . . . . . . . . . . . . . . . 2561
46、2 10-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25612 10-2 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 25612 10-3 Application of Water . . . . . . . . . . . . . . . . . . 25612 Chapter 11 Weathering Test. . . . . . . . . . . . . . . . . . . . 25612 11-1 G
47、eneral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25612 Chapter 12 Conditions of Classification . . . . . . . . . . 25612 12-1 Conditions to Be Met . . . . . . . . . . . . . . . . . 25612 Chapter 13 Report of Results. . . . . . . . . . . . . . . . . . . 25612 13-1 Data . . . . . . . .
48、 . . . . . . . . . . . . . . . . . . . . . . . 25612 Chapter 14 Referenced Publications. . . . . . . . . . . . . 25613 Appendix AExplanatory Material. . . . . . . . . . . . . . . 25613 Appendix BReferenced Publications. . . . . . . . . . . . 25613 Index . . . . . . . . . . . . . . . . . . . . . . .
49、. . . . . . . . . . . . . . . . 25614 ? 2564FIRE TESTS OF ROOF COVERINGS 1998 Edition NFPA 256 Standard Tests of Roof Coverings Fire Tests of Roof Coverings 1998 Edition NOTICE:An asterisk (*) following the number or letter des- ignating a paragraph indicates that explanatory material on the paragraph can be found in Appendix A. Information on referenced publications can be found in Chapter 14 an