... chute 40 feet long, 3 feet wide and 18 feet high. These dimensions can be changed in length and height, but not in width. The chute is built of 7/8-inch matched pine boards, to the same width as sheet zinc, usually 3 feet; the boards being firmly cleated together on the under side by 2 x 6-inch cleats 5 feet apart, throughout the length of the chute. Boards should be screwed to the cleats from the face of the chute with 1-1/2-inch screws, the heads being counter sunk. The several lengths of zinc are soldered into one piece, the joints being on the under side (as shingles on a ... — Camping For Boys • H.W. Gibson