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immediate downloadReleased: 2007-04-30
BS 476-3:2004+A2:2007
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+A2:2007 |
| Pages: | 16 |
| Released: | 2007-04-30 |
| ISBN: | 0 580 43794 9 |
| Status: | Standard |
DESCRIPTION
BS 476-3:2004+A2:2007
This standard BS 476-3:2004+A2:2007 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:
capacity of a representative section of a roof to resist penetration by fire when the external surface is exposed to radiation and flame; and
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.$