1、 NFPA 268 2017 Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy SourceIMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA STANDARDS NOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA STANDARDS NFPA codes, standards, recommended practi
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11、iation are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169. Copyright 2016 National Fire Protection Association . All Rights Reserved. NFPA 268 Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Sou
12、rce 2017 Edition This edition of NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source, was prepared by the Technical Committee on Fire Tests. It was issued by the Standards Council on November 11, 2016, with an effective date of D
13、ecember 1, 2016, and supersedes all previous editions. This edition of NFPA 268 was approved as an American National Standard on December 1, 2016. Origin and Development of NFPA 268 The 1996 edition of NFPA 268 represented the rst edition of a standard that addressed the determination of ignitabilit
14、y characteristics of exterior wall assemblies. The test method incorporated a radiant heat energy source. At the time this document was published, there were no standardized test methods available within the standards development organizations, and NFPA 268 complemented the re test methods available
15、 within the NFPA standards. The results of this test could be used to measure and describe properties of materials in controlled laboratory conditions and also could be used as an element of a re risk assessment. The 2001 edition incorporated the new format and editorial changes as required to satis
16、fy the Manual of Style for NFPA Technical Committee Documents. Revisions to 11.4.2, 11.4.2.1, and 12.1(10)(c) were made to incorporate the specic time period that was originally within the denition. No signicant revisions were made in the 2007 edition. The 2012 edition was revised editorially. Refer
17、enced publications were revised to reference the most up-to-date documents. The 2017 edition is a reconrmation of the 2012 edition with minor editorial corrections and reference updates.DETERMINING IGNITABILITY OF EXTERIOR WALL ASSEMBLIES USING A RADIANT HEAT ENERGY SOURCE 268-2 2017 Edition Technic
18、al Committee on Fire Tests Barry L. Badders, Jr., Chair Intertek Testing Services, TX RT Scott W. Adams, Park City Fire Service District, UT E Rep. International Fire Marshals Association Farid Alfawakhiri, American Iron and Steel Institute, IL M James A. Burns, New York State Department, NY E Rep.
19、Firemens Association of the State of New York Benjamin H. Caldwell, Skidmore, Owings & Merrill LLP, NY SE Marcos Chaos, FM Global, MA I Gordon H. Damant, Inter-City Testing & Consulting Corp. of California, CA SE Rick D. Davis, National Institute of Standards & Technology, MD RT Scott E. Dillon, Cra
20、ne Engineering, MN SE William E. Fitch, P, FL SE Richard G. Gann, Gaithersburg, MD SE Marcelo M. Hirschler, GBH International, CA SE Paul A. Hough, Armstrong World Industries, Inc., PA M William E. Koffel, Koffel Associates, Inc., MD SE Sergei V. Levchik, Israel Chemicals Ltd. (ICL-IP), NY M Rep. AC
21、C-North American Flame Retardant Alliance Richard T. Long, Jr., Exponent, Inc., MD M Rep. Upholstered Furniture Action Council James Andrew Lynch, Amped I Research & Development, PA SE John Martell, Professional Fire Fighters of Maine/IAFF, ME L Rep. International Association of Fire Fighters Rodney
22、 A. McPhee, Canadian Wood Council, Canada M Kathleen A. Newman, Firetect, CA M Arthur J. Parker, JENSEN HUGHES, MD SE Jillian Roberts, Alaska Fire Marshals Ofce, AK E Kenneth Roberts, ICC Evaluation Services, AL U Michael L. Savage, Sr., City of Rio Rancho, NM E David T. Sheppard, U.S. Bureau of Alc
23、ohol, Tobacco, Firearms & Explosives, MD RT Dwayne E. Sloan, UL LLC, NC RT Stanislav I. Stoliarov, University of Maryland, MD SE Kuma Sumathipala, American Wood Council, VA M Alternates Erik H. Anderson, Koffel Associates, Inc., MD SE (Alt. to William E. Koffel) Jesse J. Beitel, JENSEN HUGHES, MD SE
24、 (Alt. to Arthur J. Parker) Richard J. Davis, FM Global, MA I (Alt. to Marcos Chaos) Timothy Earl, GBH International, MI SE (Alt. to Marcelo M. Hirschler) Sam W. Francis, American Wood Council, PA M (Alt. to Kuma Sumathipala) Matthew Freeborn, Intertek Testing Services, PA RT (Alt. to Barry L. Badde
25、rs, Jr.) Stephen Paul Fuss, U.S. Bureau of Alcohol, Tobacco, Firearms & Explosives, MD RT (Alt. to David T. Sheppard) Justin A. Geiman, Fire and Risk Alliance LLC, MD SE (Alt. to James Andrew Lynch) Marc L. Janssens, Southwest Research Institute, TX RT (Voting Alt.) Randall K. Laymon, UL LLC, IL RT
26、(Alt. to Dwayne E. Sloan) Michael Schmeida, Gypsum Association, OH M (Voting Alt.) Ineke Van Zeeland, Canadian Wood Council, Canada M (Alt. to Rodney A. McPhee) Matthew T. Vinci, International Association of Fire Fighters, DC L (Alt. to John Martell) Robert J. Wills, American Iron and Steel Institut
27、e, AL M (Alt. to Farid Alfawakhiri) Joe Ziolkowski, American Furniture Manufacturers Association, NC M (Alt. to Richard T. Long, Jr.) Nonvoting Robert H. Barker, American Fiber Manufacturers Association, VA M Rep. American Fiber Manufacturers Association Rohit Khanna, U.S. Consumer Product Safety Co
28、mmission, MD C Rep. U.S. Consumer Product Safety Commission Andrew Lock, U.S. Consumer Product Safety Commission, MD C Rep. U.S. Consumer Product Safety Commission Tracy L. Vecchiarelli, NFPA Staff LiaisonCOMMITTEE PERSONNEL 268-3 2017 Edition This list represents the membership at the time the Comm
29、ittee was balloted on the nal text of this edition. Since that time, changes in the membership may have occurred. A key to classications is found at the back of the document. NOTE: Membership on a committee shall not in and of itself constitute an endorsement of the Association or any document devel
30、oped by the committee on which the member serves. Committee Scope: This Committee shall have primary responsibility for documents on re testing procedures, for reviewing existing re test standards and recommending appropriate action to NFPA, for recommending the application of and advising on the in
31、terpretation of acceptable test standards for re 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 re test standards. This Committee does not cover re tests that are used to evaluate extin
32、guishing agents, devices, or systems.DETERMINING IGNITABILITY OF EXTERIOR WALL ASSEMBLIES USING A RADIANT HEAT ENERGY SOURCE 268-4 2017 Edition Contents Chapter 1 Administration 268 5 1.1 Scope. . 268 5 1.2 Purpose. . 268 5 1.3 Application. . 268 5 1.4 Units and Formulas. 268 5 1.5 Precision or Bias
33、. . 268 5 Chapter 2 Referenced Publications 268 6 2.1 General. . 268 6 2.2 NFPA Publications. (Reserved) 268 6 2.3 Other Publications. . 268 6 2.4 References for Extracts in Mandatory Sections. (Reserved) 268 6 Chapter 3 Denitions 268 6 3.1 General. 268 6 3.2 NFPA Ofcial Denitions. 268 6 3.3 General
34、 Denitions. . 268 6 Chapter 4 Summary of Method 268 6 4.1 Test Panel Orientation. 268 6 4.2 Test Setup. . 268 6 Chapter 5 Radiant Panel Apparatus and Specimen Mounting System . 268 7 5.1 Radiant Panel. . 268 7 5.2 Test Specimen. 268 8 5.3 Radiation Shield. 268 8 5.4 Spark Igniter. 268 9 5.5 Ambient
35、Conditions. 268 9 Chapter 6 Instrumentation and Documentation 268 10 6.1 Heat Flux Meter. . 268 10 6.2 Thermocouples. 268 10 6.3 Photographic Documentation. . 268 11 Chapter 7 Test Specimen and Mounting . 268 11 7.1 Specimen Detail. . 268 11 7.2 Mounting. 268 11 Chapter 8 Calibration of the Test Equ
36、ipment 268 11 8.1 Calibration. . 268 11 8.2 Spacing. 268 11 8.3 Validation. . 268 11 Chapter 9 Test Specimen Conditioning 268 11 9.1 Conditioning. 268 11 Chapter 10 Safety Precautions . 268 12 10.1 Gas Hazard. 268 12 10.2 High Temperature and Pressure. . 268 12 10.3 Products of Combustion. 268 12 Ch
37、apter 11 Test Procedure . 268 12 11.1 Conditioning. 268 12 11.2 Specimen and Test Equipment. 268 12 11.3 Radiant Panel Preheat. 268 12 11.4 Specimen Exposure. . 268 12 11.5 Heat Flux Variation. . 268 12 Chapter 12 Report 268 12 12.1 Information. 268 12 Chapter 13 Calibration . 268 13 13.1 Heat Flux Meters. . 268 13 Annex A Explanatory Material 268 13 Annex B Commentary on Radiant Ignition Test 268 15 Annex C Informational References . 268 16 Index . 268 18
