3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Modestas — Tue, 15 Mar 2022 07:13:13 GMT

I think the most accurate method would be to analyze the hat section as you do before, but design it manually by using the reported forces of the member. The closest approximation probably would be to create an equivalent UPT channel section and design it in STAAD.Pro. Of course, this would still be an approximation and I am not sure how similar the results to actual hat section design would be.

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Wayne Moore — Mon, 14 Mar 2022 17:39:19 GMT

How do you suggest I model it in order to get the most accurate answer as possible if I cannot actually analyze the correct shape of the section itself? Is there a certain section shape I can designate the hat channel as and manually input the section properties to reflect that of the hat channel? Thank you for your help so far.

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Modestas — Mon, 14 Mar 2022 15:49:04 GMT

UPT sections which have a General type are designed as an approximated I section in STAAD.Pro. STAAD does not design it as a Hat section or some other section (with the only exception for EN 1993-1-1:2005 code). Some more information can be found here: communities.bentley.com/.../612745

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Wayne Moore — Mon, 14 Mar 2022 15:14:33 GMT

Let me know if this works.

communities.bentley.com/.../For-STAAD-Ref.7z

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Modestas — Mon, 14 Mar 2022 14:50:35 GMT

Try to add those UPT files into a zip archive and attach it again.

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Wayne Moore — Mon, 14 Mar 2022 14:38:46 GMT

Sorry about that, it will not allow me to attach the UPT files. I have attached the dxf files to import into the section builder so you can make your own UPT files.

communities.bentley.com/.../1.25in_2D00_18ga.dxf communities.bentley.com/.../2.25in_2D00_12ga-Double-Tube.dxf

RE: 3D Modeling Issue with Hat Channel members (Purlins) failing due to being an open section.

Modestas — Mon, 14 Mar 2022 12:52:53 GMT

Please attach user tables DOUBLE 2.25-12GA.UPT and 1.25IN-18GA.UPT.