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