• Frame Story Shear to Check Beam Axial Force

    This is a two separate question post regarding Braced Frame Beam Axial Forces. PART 1: Looking to get some clarification on the correct axial load to be checking Braced Frame beams for with single diagonal braces. Per this Wiki article and some answers…

  • Unstable Structure Detected

    Hello, When running my model, the message below appeared on my screen. It warned me that an instability was found at a rigid diaphragm defined in my model for RZ. It told me to check the elements attached to this diaphragm or check PDelta Effects…

  • RE: Some questions regarding modelling in STAAD. Kind of urgent

    1. If the diaphragms are rigid, you should use FLOOR DIAPHRAGM. Floor diaphragm automatically does what a master slave does including figuring out an appropriate master node for each floor. It can also account for the in-plane torsion due to eccentricity…

  • RE: seismic canadian code NRC 2005 no option for accidental load

    It is true that there is no option to include accidental torsion as per the NRC 2005 code from within the seismic definitions. However with the implementation of floor diaphragm feature, one can now define rigid diaphragms and then when one applies the…
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