The issue is taking a ditch a specific depth below existing ground line. What is the process to get a ditch a specific depth below existing ground line?
Two end conditions will accomplish this. First one in the string should seek existing ground. The second also seeks existing ground, but only the last point is toggled on to seek intersection. This second end condition constructs the ditch.
Answer Verified By: Jeffery Johnson
Another idea is to target the surface and then set up a vertical offset. In the example below, the end condition will target a location 10' below the existing surface.
thanks good tip, how does the benching work?
Check out this video on benching: