Please how can I eliminate moments from a space truss in staad so that I have only axial loads? I am trying to check a 90m high telecoms tower in staad for compliance to EN1993-1-1:2005 only. I tried to assign truss command to all members to eliminate moments but this gives me several instability. When I remove the truss command, I get a design failure of clause EC-6.2.9/3 and EC-6.2.9.1 which implies that staad is analyzing the tower members as beams
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