1. Yes it is important to define seismic weights in all three directions for Response Spectrum and Time history load cases.
2. if you look closely to seismic definitions in provided model, you will find Z=0.16, I=1.5 and R=3.
So, the direction factors can be easily calculated by (Z/2)*(I/R) = (0.16/2)*(1.5/3) = 0.04.
2. if you look closely to seismic definitions in provided model, you will find Z=0.16, I=1.5 and R=3.
So, the direction factors can be easily calculated by (Z/2)*(I/R) = (0.16/2)*(1.5/3) = 0.04.
