Support Leg and Base Plate Analysis
Support Leg and Base Plate Analysis
(OP)
We are now facing a problem where when a vessel have to apply with seismic and wind speed to it, the PV Elite have a limitation to provide an analysis. The common issues are when the bolt hole is only 1 per each base plate or some of the material use such as channel is use for the support leg.
The PV Elite usually recommended us to use 16mm thick plate with 25mm bolt size where some time not economical and rejected by client
What should I do about this?
Thanks
The PV Elite usually recommended us to use 16mm thick plate with 25mm bolt size where some time not economical and rejected by client
What should I do about this?
Thanks





RE: Support Leg and Base Plate Analysis
RE: Support Leg and Base Plate Analysis
Regards
r6155
RE: Support Leg and Base Plate Analysis
RE: Support Leg and Base Plate Analysis
Regards
r6155
RE: Support Leg and Base Plate Analysis
The design in both books basically treats the system as a cantilevered beam. you develop base shear (transverse shear), bending moment, and tension/compression and choose a column section that meets the need. Once column loads are determined, AISC (or the Eu equivalent) can be used for column selection.
Pressure Vessel Design Manuel by Moss is also another good reference.
Also, for the loading, use the worse case of wind and seismic...but these are never applied at the same time. Also, if you have platforms and ladders going up the side of the entire vessel, or some percentage of it, I typically add 12in to the effective diameter to account for the ladder drag, and any piping you have that is running up the side make sure to add to the effective diameter.. most software will not add piping into the wind calc. Any piping on top of the vessel will need to be accounted for using a point load and the CG of the piping. Also, make sure the program is accounting for all the platforms in the wind calculation and the dead weight.