Steel Joist failing shear remedy
Steel Joist failing shear remedy
(OP)
I am checking a 28k10 joist for additional loads. However the joist is failing in shear. What is the best remedial measures that should be adopted? I am enclosing the joist calculations for reference. Any help is appreciated.






RE: Steel Joist failing shear remedy
a) distribute loads to adjacent joists
or
b) reinforce for shear
RE: Steel Joist failing shear remedy
Here are some starter ideas along the same lines as triangled's suggestions: Link
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: Steel Joist failing shear remedy
I'd feel better replacing the member with something a little stouter, like a wide flange. Any chance of that working out? We shouldn't, as structural engineers, jump through hoops to make an inadequate member (put in to save some bucks, even if it was long ago) adequate. Someone made a financial choice, and now they or their heirs will pay the price.
RE: Steel Joist failing shear remedy
If you know the joist manufacturer from the tag, you might call them for a fix if they are still in business.
Mike McCann, PE, SE (WA)
RE: Steel Joist failing shear remedy
RE: Steel Joist failing shear remedy
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: Steel Joist failing shear remedy
RE: Steel Joist failing shear remedy
You can try here: Get SJI to help you
Or here: SJI Technical Digest No. 12 Evaluation and Modification of Open Web Steel Joists and Joist Girders
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RE: Steel Joist failing shear remedy
Another option, depending on the location (as in on a roof), is to put a new frame system above the joists to support the new load. This system could be rigged to run from girder to girder (if adequate) or from column to column.
Another thing we would also do, if allowed, is to move the load to a location where there is no longer an overs stress.