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It is an aluminium section for a mullion and transom and the autocad drawing I have is very complex and I tried using autocad mechanical but it does not work as I am not able to select the area as it is very complex. The properties say that the selection is a closed area however on going to content>calculations>moment of inertia, or using aminertia, I cannot select the enclosed area.

Please give me an application where I can find the moment of inertia and corresponding values.

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  • $\begingroup$ perhaps divide into smaller parts and then combine the answers, much as we used to do with pencil and paper... $\endgroup$ – Solar Mike Apr 12 at 7:57
  • $\begingroup$ Do it manually. Probably more reliable. $\endgroup$ – Rhodie Apr 17 at 1:02
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Okay, one program I found that can help calculate the different properties of a section is "ShapeDesigner SaaS"

the reason that I am not doing it manually is that I would have to break it into at least 35+ parts. This program calculates it in a few moments. Hope this helps some people.

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