Verif ying Grade
P-32+ and P-32 Operator’s Manual P/ N: 1001547-01
•If the road slopes down from the stringline, raise the stringline (Figure 166).
Figure 166: Raise Stringline: 3% Cross Slope with 2 Foot Offset
3. Repeat step 2 for each station.
Verifying grade requires measuring the distance from the cut ground to the sonic stringline. To check grade, use
a Grade Checking Lath to check the levelness and depth of cut with the sonic stringline.
The following figures show an example of a hub offset of 1.5 feet from the edge of the road, and a hike-up of
1. Construct a Grade Checking Lath using a lath, a level bubble, nails, and standard hand tools as shown in
Figure 167: Grade Checking Lath
3.0% Slope X 2.00' Offset = .06'
Ty-wrap or Tape
Level Bubble to Lath