flame-spread rating

flame-spread rating

A measurement of flame spread on the surface of a material (or an assemblage of materials) as determined by procedures described in the applicable code.
References in periodicals archive ?
Notably, fabric-covered acoustical wall panels are tested as finished products composites) - rather than as individual Class A building materials - to yield the correct flame-spread rating.
With addition of 3-5% antimony oxide, it reportedly can achieve a Class I flame-spread rating of 10-15.
A line of polyurethane resin systems with high glass-transition temperature (Tg) and low smoke and flame-spread ratings is newly available in North America for use in high-temperature composites.