FAQ 000613 EN-US


Robert Vogl Calculation RFEM RSTAB

Why are the contact stresses of members with elastic foundations given in [kip/ft]?


The contact stresses given in the member results of RFEM are always relative to 1 ft of width. Therefore, the contact stresses have the unit [kip/ft].

If the foundation has a width different than 1 ft, you must divide the contact stress by the width of the foundation. Thus, you obtain the soil pressure in [kip/ft²] relative to the foundation width.


contact stress foundation width members with elastic foundations

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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD