I have Mcr calculation for built up I beam symmetrical about both axis, both manually and STAAD calculated according to Annex F, EN 1993-1-1:1992.
But the results are not matching.
Though difference between them is hardly 1.5%, But I am not able to figure out why it exists?
All parameters are identical, but not sure about warping and torsional constant.
I have used Roars formula book, Table 10.2 (6): wide flanged beam with equal flanges.
How does staad calculates it?
Regards
Vishal.
