POCKET REFERENCE GUIDE — 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:
oo 0.
2. Enter wall section Length:
15f5il
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:
1/4dd
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.
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