Hello,
I am a Civil engineering student and am using Staad Pro for my final year research project. I need help on how to model a box girder in staad pro. The predefined section shapes don't include that one of a box girder.
Please I need some help.
I don't believe staad has those kind of predefined sections. You can input the properties in the 'general' tab (define button) or perhaps go to the section database - tube - define your own tube size.
No matter what you do though; staad will not be able to design the member. The best you could do is get the forces & moments from the results and design by hand.