Autodesk Robot Structural Analysis

[#1]

AISC members have a warping constant (Iom or Cw) = 0 using the member from the AISC database. (see below).

But when I use this member with the CSA S16-09 design code, I get results that assign a value to Cw (see below)

Where is ROBOT getting the value of Cw?

Thanks,

[#2 · Accepted solution]

It is calculated 'inside' the steel design module either based on formulas form the selected design code or the general ones for the declared section type. E.g.

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[#3]

Artur,

This answer is also useful for my last post on Lateral Bucklyng of Tapered Section.