Special Tube Moment Frame Requirements
Special Tube Moment Frame Requirements
(OP)
Can anyone explain to me the difficulty in using tube members for SMF's as opposed to W sections? I understand that it is in the detailing requirements, but specifically what code detailing requirement(s) is/are causing so much disconsternation among structural engineers and code officials with tube SMF's?
Is there a detail solution for it, or is it insurmountable?
Would solid non-shrink grouting the whole tube frame solve the problem, as I feel that is a joint detailing issue, possibly relating to local buckling?
Is there a detail solution for it, or is it insurmountable?
Would solid non-shrink grouting the whole tube frame solve the problem, as I feel that is a joint detailing issue, possibly relating to local buckling?
Mike McCann
MMC Engineering






RE: Special Tube Moment Frame Requirements
Don't know...just guessing.
RE: Special Tube Moment Frame Requirements
To your specific problem - you can't use a tube because there are no pre-approved joints. I assume that you are forced into SMF, not a R=3 where prescriptive detailing requirements go away.
RE: Special Tube Moment Frame Requirements
RE: Special Tube Moment Frame Requirements
His interpretation of the code makes no reasonable sense to me and I believe that the exception applies here, and for more than one reason.
Mike McCann
MMC Engineering
RE: Special Tube Moment Frame Requirements