UL 790
Standard for Standard Test Methods for Fire Tests of Roof Coverings

DETAILS
Edition Number:8SCC Approved:--
Edition Date:2004-04-22DOD Approved: 1984-03-21
Price Code:AANSI Approved: 2014-07-29
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover the measurement of the relative fire characteristics of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed. They are applicable 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 fire exposure are described.

    1.3 Class A roof coverings are effective against severe fire test exposures. Under such exposures, roof coverings of this class afford a high degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.

    1.4 Class B roof coverings are effective against moderate fire test exposures. Under such exposures, roof coverings of this class afford a moderate degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.

    1.5 Class C roof coverings are effective against light fire test exposures. Under such exposures, roof coverings of this class afford a light degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying 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 fire exposure involved, but are not intended to determine the acceptability of roof coverings for use after exposure to fire. These fire test methods do not provide a basis to compare expected performance under all actual fire conditions but they do provide a basis for comparison of the response of roof coverings when subjected to fire sources that are 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

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
        • PERFORMANCE
          • 3 General
          • 4 Preparation of Samples
            • 4.1 General
            • 4.2 Intermittent-flame, burning-brand, and flying-brand test decks
            • 4.3 Spread-of-flame test decks
            • 4.4 Application
            • 4.5 Conditioning
          • 5 Test Apparatus and Set-Up – Intermittent-Flame, Spread-of-Flame, Burning-Brand, and Flying-Brand Tests
          • 6 Intermittent-Flame Test
          • 7 Spread-of-Flame Test
          • 8 Burning-Brand Test
            • 8.1 General
            • 8.2 Size and construction of brands
            • 8.3 Ignition of brands
            • 8.4 Test conditions
            • 8.5 Duration of test
            • 8.6 Observations
          • 9 Flying-Brand Test
          • 10 Rain Test
          • 11 Weathering Test
        • CONDITIONS OF ACCEPTANCE
          • 12 General
          • 13 Report