Chutes are constructed from Aluminum-coated cold-rolled commercial quality, steel sheet ASTM A463, Type 1 with T1-40 coating. Material to be U.S. No. 16 gauge (0.062-inch thick). Chutes normally commence on the lowest floor and are installed through the entire building penetrating the roof full size (24″ diameter). Termination point is normally 6’0″ above the highest roof.