Steel purlin 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,

PE01 BASE STORY PMM ratio not satisfied.

In steel element design, the design ratio under the influence of axial force and biaxial bending (PMM ratio) is made in accordance with the Design, Calculation and Construction Principles of Steel Structures (GKT and YDKT), AISC 360-16 (ASD and LRFD) or EN 1993-1-1 regulations. . According to the Design, Calculation and Construction Principles of Steel Structures (GKT and YDKT), the calculation of axial force and biaxial bending interaction equations is stated below.

• The PMM ratio value must be less than 1.

Possible Solutions:

• Lateral retention length can be reduced by defining tension rods in steel purlins.

• Roof braces (horizontal braces) and purlins can be removed from the analysis system, provided that stability elements are defined. This option allows calculation of the design ratio based on biaxial bending, ignoring the axial pressure forces on the purlins. Inclusion of lovers in the analysis system

• After the purlins are defined, any undivided purlins from the support beams can be divided from the beams they are supported by using the Split All Intersections command.

• The effects of incoming loads can be reduced by reducing purlin distances.

• Steel purlin cross-section size can be enlarged.