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Exterior
FRT wood should comply with the
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following
model building code requirements for
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exterior
FRT wood:
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ò
ASTM E-84 Tunnel Test
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áá Extended to 30 minutes and the flame
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áá spread not progress more than 10.5 feet
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áá beyond the burners and show no evidence
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áá of progressive combustion.
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ò
ASTM D-2898 Accelerated
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áá Weatheringá Test
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áá Also referred to as the ô800 inch rain
test,ö
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á álumber and plywood maintain flame
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áá spread indexes of less than 25,
indicating
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áá compliance with building code
requirements
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áá for exterior FRTW.
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