Hello Everyone!!

I was just going through some old posts on lift-off supports check & was in quandary over solutions posted by different individuals as there was not a consensus!!

What about using Appendix P for non-linear analysis such as lift-off supports? As B31.3 explicitly states in para P300 that "The method is more comprehensive than that provided in Chapter II and is
more suitable for computer analysis of piping systems, including nonlinear effects such as pipes lifting off of supports." Therfore, Appendix P should be put on in config file for lift-off check.

Should this approach be fostered for such analysis?

How accurate are the results to the real time scenario & is this the best possible approach?

I've encountered many a times that a line which may not qualify in lift-off case (the +y restraint removal philosophy & then checking in sustained case) qualifies easily in Appendix P.

Hope you all come forward with your expert views & comments!!

Keep Smiling!!It always helps!!

SJ