Normally we get response spectrum at ground level. If a pipe is running on pipe bridge which is at say 8 m , is there any code which calls for application of any amplification factor which has to be used for obtaining spectrum at pipe rack level ?
Do we need to multiply the ground spectrum with this factor and input new spectrum and apply the same for nodes corresponding to pipes at that level ?

Is there any method to amplify the spectrum as described ?

Regards,
bag_piper