EXAMPLE:

Determine the plan area for a concrete wall form that is 15 feet long x 2 feet wide x 6 feet

high.

covered in step 3. The solution to this problem is found at the end of the lesson. Determine

the plan area for a form that is 33 feet long x 3 feet wide x 7 1/2 feet high.

A.

30

B.

33

C.

66

D.

99

plan area (step 3), it is now time to compute the rate of placing. Determine the rate of placing

of concrete in the form by dividing the mixer output by the plan area. The rate of placing is

measured in vertical FPH. Compute as follows:

If the answer contains a decimal, round to one decimal place. For example, for 1.41,

use 1.4; for 1.57, use 1.6.

The rate of placing should be kept 5 FPH for the most economical design.

EXAMPLE:

Determine the rate of placing if the mixer output is 7 cubic yards per hour (7 x 27 = 189

cubic FPH) and the plan area is 15 x 2 feet.

covered in step 4. The solution to this problem is found at the end of the lesson. Determine

the rate of placing if the mixer output is 7 cubic yard per hour (189 cubic FPH) and the plan

area is 33 x 3 feet.

A.

0.8

B.

1.9

C.

2.3

D.

3.1

temperature by making a reasonable estimate of the placing temperature of the concrete.

During the various seasons of the year, you will have to consider the ambient

(environmental) temperature. The optimum concrete temperatures are 55 to 73F. If the