5. You completed step 1 of this process *(Part B) *when you determined the materials needed to

construct a concrete form. Now you are ready to design the actual form and will do this by

completing steps 2 through 17.

6. First, determine the rate of placing or the vertical fill rate per hour of the form. This

computation involves three parts. Determine the mixer output (step 2), the plan area (step 3), and

the rate of placing (step 4). Each of these steps is explained in the following pages.

capacity by the batch time. The unit measurement for mixer output is measured in cubic feet

per hour (FPH). If you use more than one mixer, multiply the output by the number of

mixers. Batch time includes loading all ingredients, mixing, and unloading. Batch time is

measured in minutes. If the answer contains a decimal, round up to the next whole number.

Compute as follows:

EXAMPLE:

Determine the mixer output if the mixer capacity is 16 cubic feet, the batch time is 7 minutes,

and the mixer operates for 1 hour.

covered in step 2. The solution to this problem is found at the end of the lesson. Determine

the mixer output if the mixer capacity is 16 cubic feet and the batch time is 6 minutes with

two mixers operating for 1 hour.

A.

290

B.

308

C.

320

D.

328

the plan area by multiplying the length by the width (it is measured in square feet). Compute

as follows: