For support forces of a result combination, the maximum component is equal to zero. This cannot be true. The minimum force is alright.


The maximum support force of a RC is zero because the load combinations included in the combination are defined as Variable (potentially). Since all support forces of these LCs have the negative sign, the resulting RC has only a negative value. Thus, the other value is zero because it is possible that no LC is acting (therefore "potentially"). Zero as a maximum is greater than any negative value.

To solve this problem, you have to define the load combinations included in the RC as Permanent:
RC1 = RC1/permanent or RC2/permanent or RC3/permanent.

In this way, the load combinations 1 to 3 will be compared. The most unfavorable value always gives the minimum and the maximum result.


result combination RC support force support forces criterion permanent variable

Contact us

Contact Dlubal Software

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

(267) 702-2815

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