surface spread of flame

flame-spread index

A numerical designation, applied to a building material, which is a comparative measure of the ability of the material to resist flaming combustion over its surface; the rate of flame travel, as measured under the applicable ASTM test, in which a selected species of untreated lumber has a designated value of 100, and noncombustible cement-asbestos board has a value of 0.
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Product tests include surface spread of flame to ASTM E 84 and BS 476: Part 7 standards - with items being rated from Class 1 to Class 4, the former being the best result achievable - and combustibility (fire propagation) to ASTM E 119 and BS 476: Part 6 standards.
The UV Colour range offers outstanding flame retardancy of Class 0, providing much needed prevention of surface spread of flame both horizontally and vertically.
The steel inner and outer facings have Class 1 surface spread of flame to BS 476: Part 7: 1987, and are Class 0 as defined by the Building Regulations.
The Degafloor Firesafe product conforms to BS476 Part 6: fire propagation (class O) and BS476 Part 7: surface spread of flame (class 1) and is ideal for areas where health and safety is paramount, says the company.
Nico Frame, Silver Fox's Marketing Manager, commented: “The IMO FTPC Part 2 - Smoke and Toxicity and the IMO FTPC Part 5 - Surface Spread of Flames tests were carried out on 1mm Fox-Flo[R] white and yellow labels.
Fox-Flo[R] Low Smoke Zero Halogen Tie-On Cable Labels are independently tested - successfully - for ultra-violet (UV) weathering; H2S sour gas exposure; salt mist spray; elevated temperature; low temperature; IMO FTPC Part 2, smoke and toxicity, and IMO FTPC Part 5, surface spread of flames.
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