section properties

[finite]

I am looking for a lisp routine for the calculation of section properties. I would like to be able to draw a section in autocad and then extract the section properties.

 

[blueprint]

If you draw your section as a 3D solid you can use AutoCADs Mass Properties to get the section properties. Steel Stubs has the ability to let you do this by adding a custom section to the database. It also has all the usual steel sections available. You can download a demo at

http://steelstubs.bizland.com

Hope this helps.

Regards
Peter

 

[butelja]

The MASSPROP command will give you the section properties that you desire. Simply draw your section and then convert it into a 2D region. Run the MASSPROP command, and you will have the answer. Be careful, because the MASSPROP command gives the properties relative to the origin of the UCS. Therefore, either move your UCS or the region so that the C.G. of the section is at 0,0,0. Since MASSPROP gives you the C.G. location, this is easy to do in a 2 step process.

 

[finite]

Butelja

Thank you for that tip. It works 100%
Thanks once again.
Regards

Finite