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ETABs Composite section Classification

thread802-489635

ETABs Composite section Classification

ETABs Composite section Classification

(OP)
Dears,

I am designing a composite profile, to AISC360-10) with web depth of 800mm and thickness of 8mm. EtaBs refuses to design a profile that is not compact

according to its design manual:-

"ETABS deems slender-element sections for flexure not acceptable and does not do any further checks of these.
I-shaped and channel sections with webs that are not compact are also deemed not acceptable"

Is there any reason for this??

Regards

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