Calculated Industries Construction Master III User Manual page 37

Back-Fill on a Slope with Percent
of Grade Known
You've built 55 linear feet of a three-foot high
retaining wall 3 feet out from the base of a 65%
grade. You plan to back-fill to within 12 inches of
the top of the wall (for a 2' depth). How many
cubic yards of fill should you have delivered?
3'
A
3'
COMMENTS
Step 1 — Find Volume for Section "A"
Clear calculator
Enter length
Multiply by width
Multiply by depth
Place in Memory
Step 2— Find Run and Diagonal of Section "B"
Enter grade as Pitch
Enter height (depth)
Find Run of "B"
Find Diagonal of "B"
Step 3— Find Volume of Triangle "B"
Enter length
Mult. by width (run)
?
B
2'
?
KEYSTROKES
[On/C] [On/C]
55 [Feet]
[x] 3 [Feet]
[x] 2 [Feet] [=]
Answer: 330 CU FT
[M+]
65 [%] [Pitch]
2 [Feet] [Rise]
[Run]
Answer: 3 FT 0-59/64 IN
[Diag]
Answer: 3 FT 8-1/32 IN
55 [Feet]
[x] 3 [Feet] 59 [/] 64
(continued on next page)
65%
Grade
User's Guide — 37