It has come to my attention that the program is using the Foundation base-soil friction coefficient to compute the passive pressure resistance when using Columb (it's using this to back calculate "delta"). To be frank, this is just wrong IMO. The wall-soil friction angle at the bottom of the footing (a horizontal surface where the concrete is poured against the soil) vs the face of the wall (smooth vertical surface that is typically formed) is different. Therefore, I'd like the ability to change this value. This can be handled one of two ways, The first which I think makes most sense is to create a soil layer in front of the wall. The second, is to just add a "Wall-soil friction angle" variable in the "foundation soil data" area similar to what is done for the backfill data.