RCPier - Spread Footings on Rock vs Soil

Hi there,

I'm checking a design calculation for an abutment on spread footings done in LEAP RCPier. I couldn't find any information in the user manual or input/analysis tabs to determine how bearing pressure is calculated for a wall bearing on soil or rock. Note, depending on this criteria, AASHTO requires bearing stress to be determined based on a uniform distribution (soil) or linearly distributed (rock).  

Any help on this matter would be appreciated.

Thanks