I am designing steel supports for piping using LRFD code. The loads on the supports are taken from Autopipe.
The question is what load cases to take from Autopipe and how accurately make the loading in Staad.
A pipe is supported by spring support+guide.
What is correct to do:
1) To take the worst case between GT & G from autopipe and place it as a dead load in Staad + to take the seismic loads from autopipe and place it under seismic case in Staad. To build combinations as per the LRFD code and analyze. Please note that i didn't add any seismic definitions in Staad, and didn't add any joint weights, just the seismic loads from autopipe.
2)To take the worst case between GT & G from autopipe and place it as a dead load in Staad. To define seismic data with joint weight=force of the spring supports, add the seismic cases and analyze as per LRFD combinations.
I am not sure regarding the joint weight. If i take the seismic loads from autopipe "as is", do i need to add joint weights - can i assume that spring supports loading is like a mass at a point?