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Compound Slope Setup
3. Rotate the S1 adapter until it matches the angle determined with the slope
chart. Note: if, when standing behind the laser, the highest corner on the site is to
the right of the grade sight, you must rotate the adapter counter clock-wise until
you reach the proper reading. If the high corner is to the left, you must rotate the
adapter clock wise.
4. Turn the entire laser toward the uphill direction of the cross slope (toward the
highest corner on the site) until the slope alignment sight is once again aligned
parallel to the main slope. The laser is now at the proper angle.
5. To finish the setup, dial in the resultant slope determined from the chart and go
to work. Note: you can re-check the setup at any time by doing the following: A.
Verify the slope counter setting. B. Verify that the proper angle is set into the
compound slope adapter. C. Verify that the slope sighting slot is parallel with the
main slope direction. D. Verify that the uphill direction of the laser is aimed
toward the high corner of the site.
Always set at least two grade checking stakes that are 90 degrees apart so that
you can verify the laser setup from day to day on the site.
1. Zero the compound slopeadapter
ring and aim the laser parallel to the
main slope, with the up-slope
direction of the laser aimed up-hill on
the site.
2. Look-up the intersection of the
main slope (.25) and the cross slope
(.15) using the slope chart. The box at
the intersection. looks like this:
3. Turn the adapter sighting slot 31°
counter clock-wise.
4. Turn the entire laser to re-align the
sighting slot parallel with the main
slope. (the laser is now aimed 31°
toward the high corner).
5. Dial the resultant slope of .29% into
the slope counter. • Done.
Compound slope example
Cross slope= .15% up
31
0.292
Low corner
High corner
31°
Resultant
slope .29%
11
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