I searched SSRC and fedral corporation limitations for I-beam buckling during lifting
One issue with SSRC that C ~ 1000 which gives non-resonable critical weight
Other issue with fedral requirements .. That resistant moment is not reasonable also
.. So I would like to ask .. For a hyprid I beam 75m length 3.25 depth .. And will be lifted at the quarter of its length (two lifting positions), what is the buckling behaviour and how can I check it in order to insure the beam stability during lifting ?