Flame Spread Indexes and Fire Rating of Composite Materials

FLAME SPREAD INDEXES AND FIRE RATING OF COMPOSITE MATERIALS 

Some plastic lumber or WPG deck boards are not snitable to test according to ASTM E 84. As the fire exposure in the ASTM test is on the nnderside of a horizontal 

TABLE 14.3 Ignition temperatures (FIT or SIT) for plastic-based commercial composite deck boards, reported by manufacturers and determined according to ASTM D 1929 

Deck board Manufacturer Principal ingredients FIT or SIT Ignition temperature, °C (°F) 

USPL U.S. Plastic Lumber HDPE, wood flour SIT 387 (729) 

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