Calculated Industries 4065 v3.1 User Guide - Manual (Page 61)

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— 53
GRADE/SLOPE
Back-Fill on a Slope — Percent of Grade Known
You’ve built 55 linear Feet of a 3-foot high retaining wall that is 3 Feet
from the base of a 65% grade. You need to pour back-fill within
12 Inches of the top of the wall (for a 2 Foot depth). How many Cubic
Yards of fill should you have delivered?
KEYSTROKE DISPLAY
1. Find volume for “A”:
o o 0.
5 5 f 55
FEET
x 3 f 3
FEET
x 2 f = µ M+ 330.
CU FEET
2. Find run of “B”:
6 5 % p %GRD 65.
2 f r RISE 2
FEET
0
INCH
R RUN 3
FEET
0-15/16
INCH
3. Find volume of triangle “B”:
5 5 f 55
FEET
x ® R RUN 3
FEET
0-15/16
INCH
x 2 f = 338.4615
CU FEET
÷ 2 = µ M+ 169.2308
CU FEET
4. Find total volume:
® ® M+ 499.2308
CU FEET
Ç y 18.49003
CU YD
M
M
M
M
M
M
M
M