How to identify brace members in .std file

Hello,

I am new to STAAD and I am trying to model a simple beam structure (square ).

I want to check if I apply a load on it and check the stress value after simulation. If the stress value exceeds the certain value , then I want to apply the cross beams to it or else not.

So, my question is how we can find out these brace members in the .std file,without using the GUI of STAAD.

Does anyone have any suggestions?

Thanks