P
OCKET
R
EFERENCE
G
UIDE
— 30
Drop of Retaining Wall
You’re building a 61 Feet 8 Inch retaining
wall along a driveway that slopes away at
1/4 Inch per Foot. There are 4 sections,
each measuring 15 Feet 5 Inches in
Length. What is the proper drop amount
for each section? What is the total (accu-
mulated) drop Depth at the end of all four
sections?
KEYSTROKES
DISPLAY
1. Clear calculator:
o o
0.
2. Enter wall section Length:
1 5 f 5 i l
LNTH 15
FEET
5
INCH
3. Enter drop per Foot to find the drop per
section and the total drop Depth at 1st
wall section:
1 / 4 d d
DROP 0
FEET
3-7/8
INCH
4. Find total drop Depth of 2nd through 4th
wall sections:
d
DROP 0
FEET
7-11/16
INCH
d
DROP 0
FEET
11-9/16
INCH
d
DROP 1
FEET
3-7/16
INCH
Note: Successive presses of
d
will continue to
add the drop amount of 3-7/8 Inches to the prior wall
section’s drop, for an accumulated drop total.
