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Homepage>BS Standards>13 ENVIRONMENT. HEALTH PROTECTION. SAFETY>13.220 Protection against fire>13.220.50 Fire-resistance of building materials and elements>BS 476-3:2004 Fire tests on building materials and structures Classification and method of test for external fire exposure to roofs
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immediate downloadReleased: 2007-04-30
BS 476-3:2004 Fire tests on building materials and structures Classification and method of test for external fire exposure to roofs

BS 476-3:2004

Fire tests on building materials and structures Classification and method of test for external fire exposure to roofs

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Standard number:BS 476-3:2004
Pages:16
Released:2007-04-30
ISBN:0 580 43794 9
Status:Corrigendum
DESCRIPTION

BS 476-3:2004


This standard BS 476-3:2004 Fire tests on building materials and structures is classified in these ICS categories:
  • 13.220.50 Fire-resistance of building materials and elements

The tests given in this British Standard are designed to enable measurement of:

  1. capacity of a representative section of a roof to resist penetration by fire when the external surface is exposed to radiation and flame; and

  2. distance of the spread of flame on the outer surface of the roof covering under certain conditions.

Roofs are graded according to the angle at which they are tested, the time for which they resist penetration by fire, and the distance of superficial spread of flame on their external surface.

#An additional test for rooflights is given in Annex C.$