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Secondary steel beam PMM ratio not satisfied.

This message is created by specifying the element name and floor on which it is located at the beginning of the report.

For example,

SB001 BASE STORY PMM ratio not satisfied.

In steel element design, the design ratio under the combined axial force and biaxial bending (PMM ratio) is made by the CYTHYE 2016 (GKT & YDKT), AISC 360-16 (ASD & LRFD) or EN 1993-1-1. According to AISC 360-16, axial force and biaxial bending interaction equations are calculated below.

  • The PMM ratio value should be less than 1,00.


  • The flexural design strength of the secondary beam section can be increased by defining composite beam on the secondary beams. In this way, a composite beam design is made for the secondary beams. This title can be examined for the warning that composite beam strength is not provided.

  • Secondary beam spacing can be reduced.

  • Steel element cross-section can be enlarged.

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