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NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source

2022 NFPA 268 Standard - Current Edition
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  • Description

    Help improve building fire safety by referencing NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source, 2022 edition.

    It's vital that manufacturers and testing laboratories have accurate procedures for testing the ignitability characteristics of building construction materials and components. NFPA 268, 2022 edition, outlines the methods for deciding the susceptibility of exterior wall assemblies to fire in the presence of a pilot ignition source.

    The document answers the need for standardized test procedures that complement fire test methods available within existing NFPA standards. Ignitability characteristics are tested when exposed to a radiant heat flux of 12.5 kW/m2 (1.10 Btu/ft2-sec) for 20 minutes.

    This resource can be used to measure and describe the properties of materials in controlled laboratory conditions and also as an element of a fire risk assessment.

    NFPA 268 is used in various processes, including:

    • Code and regulatory
    • Research and development
    • Specification and design

    The revised 2022 edition is the reliable source for the most up-to-date information and methods of testing the ignitability of exterior wall assemblies and their propensity for contributing to fire expansion.

    From procedures and specimens to calibration of equipment and safety precautions, NFPA 268 is your comprehensive resource to this method of product fire testing. The standard applies to exterior wall assemblies with flat, or almost flat, outward-facing surfaces. The 2022 edition is updated to address testing at different incident heat fluxes for larger fire separation distances.

    Help ensure you have access to the latest NFPA 268 knowledge and requirements.

    Update to the 2022 of NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source, by ordering your copy today! (Print, 24 pp., 2022)

  • Table of Contents (2022 Current Edition)

    NFPA® 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source, 2022 Edition

    Chapter 1 Administration
    1.1 Scope.
    1.2 Purpose.
    1.3 Application.
    1.4 Units and Formulas.
    1.5 Precision or Bias.
    Chapter 2 Referenced Publications
    2.1 General.
    2.2 NFPA Publications. (Reserved)
    2.3 Other Publications.
    2.4 References for Extracts in Mandatory Sections. (Reserved)
    Chapter 3 Definitions
    3.1 General.
    3.2 NFPA Official Definitions.
    3.3 General Definitions.
    Chapter 4 Summary of Method
    4.1 Test Panel Orientation.
    4.2 Test Setup.
    Chapter 5 Radiant Panel Apparatus and Specimen Mounting System
    5.1 Radiant Panel.
    5.2 Test Specimen.
    5.3 Radiation Shield.
    5.4 Spark Igniter.
    5.5 Ambient Conditions.
    Chapter 6 Instrumentation and Documentation
    6.1 Heat Flux Meter.
    6.2 Thermocouples.
    6.3 Photographic Documentation.
    Chapter 7 Test Specimen and Mounting
    7.1 Specimen Detail.
    7.2 Mounting.
    Chapter 8 Calibration of the Test Equipment
    8.1 Calibration.
    8.2 Spacing.
    8.3 Validation.
    Chapter 9 Test Specimen Conditioning
    9.1 Conditioning.
    Chapter 10 Safety Precautions
    10.1 Gas Hazard.
    10.2 High Temperature and Pressure.
    10.3 Products of Combustion.
    Chapter 11 Test Procedure
    11.1 Conditioning.
    11.2 Specimen and Test Equipment.
    11.3 Radiant Panel Preheat.
    11.4 Specimen Exposure.
    11.5 Heat Flux Variation During a Test.
    11.6 Testing at Different Incident Heat Fluxes for Larger Fire Separation Distances.
    Chapter 12 Report
    12.1 Information.
    Chapter 13 Calibration
    13.1 Heat Flux Meters.
    Annex A Explanatory Material
    Annex B Commentary on Radiant Ignition Test
    Annex C Informational References
  • Prior Editions

    2017 Edition

     

    Accurately assess ignitability by testing exterior wall assemblies according to the methodology presented in the new NFPA 268.

    Revised to include updated references, the 2017 edition of NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source describes a method to determine the propensity of ignition of exterior wall assemblies from exposure to 12.5 kW /m2 radiant heat in the presence of a pilot ignition source.

    From instrumentation and documentation to safety precautions and calibration, NFPA 268 provides testing laboratories and manufacturers with the comprehensive testing guidance they need. (Print, 18 pp., 2017)

    2012 Edition

     

    Accurately assess fire risk by testing exterior wall assemblies according to the methodology presented in the 2012 NFPA 268.

    Revised to include updated references, the 2012 NFPA 268, Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source describes a method to determine the propensity of ignition of exterior wall assemblies from exposure to 12.5 kW /m2 radiant heat in the presence of a pilot ignition source.

    From instrumentation and documentation to safety precautions and calibration, this document provides testing laboratories and manufacturers with comprehensive testing guidance. (Softbound, Approx. 17 pp., 2012)

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