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— 32
1 / 4 d d
DROP 0 FEET 3-1/2 INCH
5. Enter .375 inch drop per foot and nd
amount of drop:
. 3 7 5 i d d
DROP 0 FEET 5-1/4 INCH
6. Convert to decimal inches:
c i 5.25 INCH
7. Convert to decimal feet:
c f 0.4375 FEET
Drop of a Retaining Wall
You’re building a 61 foot 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 (accumulated)
drop depth at the end of all four sections?
KEYSTROKE 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 nd the drop per
section and the total drop depth at rst
wall section:
1 / 4 d d
DROP 0 FEET 3-7/8 INCH
4. Find the total drop depth of second
through fourth 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
PRG4225E-E.indd 31 6/28/2016 1:03:10 PM
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