Determine the yoke spacing for a 9-foot column whose largest cross-sectional dimension is 36 inches.

Construction materials are 2- by 4-inch and 1-inch sheathing.

15, 17, 17, and 10 inches. The spacing between the top two yokes is reduced due to the limits of the column

height.

Design the forms for a concrete wail 4 feet high, 40 inches long and 18 inches thick. Two 16-S mixers are

available, each producing 16 cubic feet of concrete every 4 minutes. Materials available are l-inch plywood

sheathing used the strong way, 2-by 4-inch studs, double wales, and 3000# tie rods. The estimated concrete

temperature is 60F.

Design the forms for a concrete retaining wall that is 120 feet long, 1-foot wide, and 12 feet high. You have an

M919 concrete mobile mixer available and you have estimated your production rate at 12 cubic yards of concrete

per hour. You are to construct the forms from 3/4-inch plywood, 2- by 6-inch studs, 2- by 6-inch double wales,

and No 8 tie wire. The concrete temperature is estimated at 50...F.

Determine the maximum spacing for braces for the wall in Problem No 2. The brace material is 2- by 6-inch by

12-foot. You will have to connect the braces 2 feet below the top of the form. A Natural Trigonometric

Functions (Trig Table) (see Table 3-10) is provided, if needed.