So they are paving a rectangular area with some experimental pavement to test it's properties for runway applications. As a result the pavement needs to be very even. (Think scientific method - removing all variables from the equation except the one being tested)
Based on the proposed data provided, the area they are paving comes out to be a 0.99% slope. That's pretty much 1%. The area is about 240' x 130'. My initial plan was to set a PK offset from the exact center of paving area and setup a grade laser over it. Then set a pk up station 100' and back station 100'. Then the grade laser can be set and checked at those points. (If set to 1% the should be 1' higher and 1' lower than the midpoint).
Then I started second guessing that and thinking I could set proposed grade at the center on each end in the direction of the slope and then stake that line with the trusty TCRP 1203+. Then wherever I am (station or offset) it will give me cut/fill to the proper grade at that point along the slope. It only slopes one direction.
I'll probably end up setting the laser and double checking everything with the total station. Just wondering if anyone has any thoughts. The laser would be nice because I could leave and do other stuff while they check their own grades.
sloping laser and a bench mark
Just remember that if your C/L profile has any slope to it, you will need a dual slope laser, which are a little harder to set up. Also the crew will have the tendency to push it beyond it's range because they are still getting a signal.
It only slopes in the North-South direction. It's flat East to West.