top of page

Compound Slope Setup

Sites designed with compound slope actually have just a single resultant slope. When a site has slope in two directions, 90 degrees apart, the model S2 Compound Slope Adapter Kit can help you calculate and set the AS2 laser to the proper angle and slope.

To begin a compound slope setup, the S2 Compound Slope Adapter Kit must be installed on the laser, following the instructions included with the kit. next follow the steps below:

1. Determine the two slopes for the site and the direction of each slope. Set the S2 adapter's pointer to the zero (0) degree mark and aim the slope alignment sight parallel to the direction of the main slope on the sight (the main slope is the steeper of the two slopes).

Be certain that the up-slope direction of the laser is aimed uphill on the main slope (refer to the label on the side of the laser just above the slope knob for a diagram showing the up-slope direction of the laser is aimed uphill on the main slope (refer to the label on the side of the laser just above the slope knob for a diagram showing the up-slope and down-slope directions).

2. Using the compound slope chart supplied with the S2 kit, find the two slopes for the site on the chart and follow their row and column until they intersect. Remember that the main slope is the steeper of the two slopes. The upper number in the box where the two slopes intersect is the angle to set into the S2 adapter. The lower number is the resultant slope to dial into the laser's grade counter. Note: The slope number on the chart is displayed with greater precision than the grade counter increments.

3. Rotate the S2 pointer until it matcher  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 slope 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. Without changing the S2 setting, aim the entire laser toward the uphill direction of the cross slope (toward he 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, set the resultant slope determined from the chart into the AS2's slope counter 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 adapter. C. Be sure the slope sight is parallel with the main slope direction. D. Be sure the uphill direction of the laser is aimed toward the high corner of the site.

Always set at least two grade checking stakes, one in each axis, so that you can verify the laser setup from day to day on the site.

1. Zero the S2 pointer 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 main slope (.50) and the cross slope (.20) 

on the slope chart. The box where they meet looks like this:

3. Turn the S2 adapter 22 degrees counter clock-wise.

4. Aim the entire laser to re-align the sight so that is is

parallel with the main slope. (The laser is now aimed 22

degrees toward the high corner).

5. Set the resultant slope of .54% into the AS2's slope 

counter and go to work.

22

0.539

High Corner

22

o

Resultant slope .54%

(rounded from 0.539)

Low Corner

Compound Slope Example

Cross slope- .20% up

Main Slope= .50% up

AS2 Video tutorial

SLOPE CHART 2.jpg
bottom of page