In RF‑PUNCH Pro, I get the message No. 58 saying that the surface load inside the critical perimeter cannot be determined for result combinations. Why is this message displayed? How can I avoid it?

Answer

When determining the punching load from shear forces in the critical perimeter in RF‑PUNCH&nbp;Pro, the "Consider surface load inside the critical perimeter" option is available at the end of Window 1.5.

If you select the "Determine" option, the program requires a clear load situation. This explicit load situation is not given when applying the result combination (RC). Therefore, you receive the mentioned message No. 58. 

You can avoid this problem by entering the surface load inside the critical perimeter manually, or by using load combinations (COs) instead of result combinations (RCs) in your calculations.

Keywords

Punching shear Wall corner Wall end Message 58 58 Surface load Critical perimeter

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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
RFEM Concrete Structures
RF-PUNCH Pro 5.xx

Add-on Module

Punching shear design of foundations and slabs with nodal and line supports

Price of First License
760.00 USD