Regarding the seismic analysis using dynamic tool of response spectrum method, I need some advice from specialists who have many experiences.

Our piping is laid from a HRSG structure to Turbine building via a pipe rack.

when we need to use seismic spectrum, C-II can generate a spectrum data by structural code like UBC. as far as i know, the spectrum generated automatically by C-II is ground response spectrum then the spectrum can be used if the piping is located on ground level.

but in my case above, should amplified response spectrum by each elevation attaching the piping be applied instead of ground spectrum? because our piping is on three structures.

of course, three structures may have different spectrum then the enveloped spectrum including the three spectrum has to be applied.

generally does the architectural team supply the data through the structure analysis?

If the data is not available, are there big discrepancy between the results using ground spectrum and amplified(floor) spectrum?

I'm looking forward to listening to valuable advice from specialists.