A 1 1/2-inch by 1 1/2-inch 16-gauge galvanized angle frames the duct penetration for a fire damper sleeve at a scheduled partition. The duct clearance allows up to a maximum of 1/2 inch around the sleeve assembly.
FIRE DAMPER SLEEVE PARTITION AS SCHEDULED 1 1/2" X 1 1/2" 16 GAUGE GALVANIZED ANGLE 1/2" MAX. DUCT
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