EXAMPLE:
Determine the maximum concrete pressure if the rate of placing is 2.5 FPH and the concrete
temperature is 60F.
500 psf
Step 6b. For a more precise determination of maximum concrete pressure, compute as
follows:
9,000R
Maximum concrete pressure =150 +
(7)
Temperature (degrees Fahrenheit)
NOTE: This formula is used in place of Figure 1 when determining maximum concrete
pressure throughout this subcourse and in the examination.
EXAMPLE:
Determine the maximum concrete pressure if the rate of placing is 2.5 FPH and the concrete
temperature is 60F.
525 psf
9,000 x 2.5
Maximum concrete pressure = 150 +
= 150 + 375 = 525 psf
(8)
60
Problem 9. Work the following problem to see how well you understand the concepts
covered in steps 5 and 6. The solution to this problem is found at the end of the lesson.
Determine the maximum concrete pressure if the rate of placing is 1.6 FPH and the concrete
temperature is 70F.
A.
205
B.
256
C.
300
D.
356
Problem 10. Work the following problem to see how well you understand the concepts
covered in steps 5 and 6. The solution to this problem is found at the end of the lesson.
Determine the maximum concrete pressure if the rate of placing is 1.9 FPH and the concrete
temperature is 50F.
A.
400
B.
492
C.
500
D.
518
Step 7. Determine the maximum stud spacing. The maximum stud spacing depends on the
type of sheathing used--boards or plywood. The maximum stud spacing is found by using
either Table 1 for board sheathing or Table 2 for plywood sheathing. Use Table 1 or 2 and
compute as follows:
Find the maximum concrete pressure in the left column. If the value is not listed,
adjust the load up to the next value on the table. For example, for 340 psf, use
400 psf.
10
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