huangyhg

pipe analysis
i am trying to build a staad model of a large pipe and the drawings i am using are not very specific about the supports. the iso drawings of the pipework indicate the location of supports and name them as "guide shoe", "slide shoe", tight shoe", "sliding plate", "stopper shoe". i don't have any other information about the support arrangements. i am trying to figure out what restraints should i introduce to the pipe (vertical support only? vertical & lateral? or vertical, lateral & longitudinal?) does anybody know if the terminology corresponds to something very specific?

kind of would have to see the p&id of it to work out some of them.
stopper shoe should be a hard support, not letting the pipe elongate or move. kind of like a thrust block.
at a vertical bend, the lower support usually slides (can't move side to side, and is supported vertically). the upper support, just outside the bend, can usually move side to side, but is fixed vertically.
obviously, this can change depending on the mechanical engineer. just think about how the pipe is trying to move, and if it should be allowed to move that way, and you should be able to work it out.
if mechanical has put it into caesar, they should be able to give you the reactions and it should make more sense to you.
beware of caesar results from the mechanical folks, though. they'll model a pipe support an a skinny structure 150' in the air as "fixed" - well, it ain't. work closely with your mechanical engineer to ensure that the "stopper shoe" really is fitted to something with a high stiffness, or it suddenly becomes a "slide shoe" even though it doesn't physically slide.
if you "heard" it on the internet, it's guilty until proven innocent. - dcs

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