Spectra DG613 - Page 38

Example:
The pipe is laid correctly when the rod reading “A” minus rod reading “B” equals the rise
according to the engineering plans.
Feet / Tenths
Metric
Rod Reading at “A”
15.74 feet
4.801 m
Rod Reading at “B”
12.289 feet
3.749 m
Rise or Difference (A
– B)
3.451 feet
1.052 m
Distance from A to B
145 feet
44.196 m
Rise divided by Run
0.0238
0.0238
Rise divided by Run times 100
= Laser Setting
2.38%
2.38%
Rise according to engineering
plans
(2.38% * 145 feet)
= 3.451 feet
(2.38% * 44.196 m)
= 1.052 m
38