Sonic Stringline
P/N 7010-0344
5-13
To inspect grade, use the laser detector and the cut/fill lath or folding
rule. At the edge of the road, finished grade is the same as the
stringline hike-up. Any cuts or fills are immediately measured on the
lath or folding rule.
Figure 5-15.
Grade can be inspected at the 1/4 crown, centerline, or any desired
distance. Just measure the distance from the edge of the road, and
calculate the desired finished grade using the formula [RISE =
(%)(RISE)].
Figure 5-16.
2.0'
2.0%
.2
.1
.0
.1
.2
.3
.4
.5
POWER
.60
.50
.40
.30
.20
.10
POWER
10.0'
18.0'
C
L
1.80'1.64'
RISE = .2'RISE = .36'
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