(I don't know the english word for it, in German it is called "Pflanzsstein").
I.e. something like this:
My problem is that all manufacturers I found so far, assume in their standard cases that the terrain above the wall is flat without slope, for example like this:
Taking this image as example (70 degree angle of the wall), the maximal height with flat terrain above the wall would be 2 meters.
Suppose my wall has only 1,5 meters and the terrain above it has a slope angle beta. How can I determine the maximal slope angle beta that works for this example?
Is there any free software which does the calculations for me in this and similar cases?