Design the forms for the roof of a concrete water tank which will be 6 inches thick, 20 feet wide, and 30 feet long.

The slab will be constructed 10 feet above the floor of the tank. Available materials are 1- by 6-inch boards and

4- by 4-inch lumber, both S4S. The slab is to be finished using hand tools.

Design the forms for a rectangular column 24 by 28 inches and 15 feet high. Materials are 1-inch board sheathing

and 2-inch by 4-foot lumber. (See Figure 3-6 on page 3-28.) From the information given figure the following:

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