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RFEM - the effective length is not defined

Pretty Girl

Structural
Joined
Nov 22, 2022
Messages
156
Location
AU
Why these errors occur? This is a very basic structure to test the software. I did their steel hall tutorial as well before which it ran smoothly without any errors and at that the RFEM didn't ask to set effective lengths manually.

I just drew four legs, on top of the drew another four legs, connected those with beams and bracings and put hinged support. When I click the analyze button, it throws these errors.

Why don't it just automatically calculate the effective lengths etc. Or is it saying some other thing that I should have done?

Tension braces are also just steel beams (I just wanted to test it without wasting much time)

Screenshot 2025-07-20 at 7.34.03 pm.jpg
 

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