ETAB - General Frame Section

[EngineerRam]

Hello,

When defining a general frame section in ETABS, section dimensions are to be defined. However, the section properties can also be overwritten. Are the section dimensions specific only towards weight or is there something else they correspond to?

Thanks

 

[milkshakelake]

I assume the dimensions are used to automatically calculate things like I, unless you overwrite them. Perhaps also where to calculate endpoint of shear and moment. It's also something to show graphically in 3D views.

 

[JoshPlumSE]

I think the reason is that the basic properties of an I-beam can be calculated based on depth, flange width / thickness and web thickness. But, when you have things like slightly tapered flanges, or fillet radius.... When you have these things you can enter in more exact properties for the member.