Check that you are using the correct hazard factors, damping and site subsoil class for the response spectrum by going to; Define/Functions/Response Spectrum/Modify. The check that you are mobilizing sufficient modes with your frequency analysis also (Min 20 modes for Eigen, about 10-15 for...
You need to have a full version of Autocad installed locally on your PC in order to be able to import DWG's direct into ETABS.
if you dont, then your only option is to use a DXF.
Depends what you're designing.
Top/bottom stresses are due to out-of-plane moments. (Wall bending about weak axis)
Direct compression/tension stresses are due to in-plane effects. (wall bending about strong axis)
To design reo, you need to consider both simultaneously.
