Quote:
Originally Posted by Meru
Sorry to hijack but out of curiosity, if a pipe of that diameter is suitable, what about a square section? I ask because I have access to a 125mm square section with a wall thickness of 9mm, and a 150mm square section with 6mm thickness (Both are approx 1m high). I wanted to use these as the pier, and then weld it to a 300mmx300mm 16mm steel base plate.
I suppose the vertices of the RHS sections would have some stress concentration but I dont see why it would matter, given that the loads arn't exactly massive. Thoughts on this?
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150x6SHS has the bigger Ix and Ze, so is stiffer and stronger than the 125x9SHS. Whether they're suitable for your mount and scope depends on what you're putting on them.
Note that neither of those come close to the stiffness of a 230x8 (or thereabouts) CHS. However a 150x6SHS is stiffer than a 150x6CHS.
And totally agree with the above, do not put one of those ridiculous rat cages on top. Will only weaken the system.