Unsupported Precision Round Rail Calculator

[Ross77]

I started off down that path of calculating the I values of each bit in Autocad and the parallel axis etc...... but gave up on the torsion constant for irregular shapes, when I was looking on the net I kept seeing reference to to the 2 polar moment which CAD can also work out but this is only true for circular tube and bar. I only gave up because I can now use FEA to do it all for me. if you get any where then I sure would like to know.

I also found that the more you analise it the more time it takes and you soon realise that, as Barry pointed out, just doing a few basic cals on the main structure will be sufficient. adding the rails etc becomes the factor of safety that seems to be missing from a lot of calcs. :naughty: