Moments m_x and m_y in Local Surface Axis System

The moments m_x and m_y (Image 01) refer to the local surface axis system and would, therefore, only occur in the case of loading in the local z‑direction of the surface.

1 Surface Internal Forces

In this case, the solution is to create a result beam in the direction of the desired single-span beam and to obtain the bending moments from the corresponding member internal forces (Image 02).

• Using Result Beam in RFEM

2 Member Internal Forces of Result Beam