Hi again Manoj,

One more suggestion: In Configuration/FRP Properties spreadsheet, try to change the "BS 7159 Pressure Stiffening" parameter from "Design_Strain" default value to "Actual_Pressure" value, which is actually compliant with ISO 14692-3 analysis basis and definitely much more realistic for FRP/GRP piping actual behavior simulation.

This parameter affects how are calculated elbows' flexibility factors. Increasing pressure value, elbows flexbility factor decreases so that elbows become more rigid. The SIFs are reduced accordingly, but this is not relevant for your support loading problem.

Please note that the default "Design_Strain" parameter "instructs" Caesar II to consider that FRP piping is fully pressurized to its design limit when calculating elbows' pressure stiffening effect. This approach corresponds to the older BS 7159 code, and it might yield to significant over-estimation of pressure stiffening effect on FRP/GRP elbows.

So, change that setting parameter and then re-run the application See what load change you get...

Regards,