best way to add another angle to an existing angle column
best way to add another angle to an existing angle column
(OP)
existing column angle of access platform is 3x3x3/8. this is just minor platform but 10' high.
i'm thinking of adding a 2.5x.2.5x3/8 and field stitch fillet weld like an inch every 12 inches.
i'm thinking of adding a 2.5x.2.5x3/8 and field stitch fillet weld like an inch every 12 inches.






RE: best way to add another angle to an existing angle column
Whenever I use a stitch weld connection for things like this (as you are suggesting) I usually specify a continuous weld for the ends of the member - perhaps 6 to 12 inches long depending no the section size.
Look in AISC under the built-up section where they discuss continuous end welds for beam cover plates - sort of the same theory here.
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RE: best way to add another angle to an existing angle column
RE: best way to add another angle to an existing angle column
RE: best way to add another angle to an existing angle column
RE: best way to add another angle to an existing angle column
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: best way to add another angle to an existing angle column
1) Field bolt. Less messing with galvanizing. Can use matching angle.
2) 4" spacer plates. Again, can use matching angles if you care to.
3) Use just a plate to make a WT of sorts.
4) Use just a plate partial height to make a closed triangular section.
I'd guess that your failure mode is torsional bucking. It would be nice to either eliminate that mode with a closed section or at least maintain some symmetry to make the calcs easy.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.