Composite Infill Beam Camber in Moment Frame
Composite Infill Beam Camber in Moment Frame
(OP)
I'm working on a steel office building where the lateral system consists of moment frames in both directions and I had a question with respect to typical practice for whether to camber the infill beams adjacent to the moment frame beams.
I've read that beams with moment connections should not be cambered, so I am concerned with the difference in elevation for the deck bearing for the infill beams next to the moment frames (ie, high to low to high).
I've read that beams with moment connections should not be cambered, so I am concerned with the difference in elevation for the deck bearing for the infill beams next to the moment frames (ie, high to low to high).






RE: Composite Infill Beam Camber in Moment Frame
Some addl info, infill beam camber = 3/4" and beam spacing is 8'-0". My gut says its not a big deal and they can pull the decking down (2" deck) onto the beam that is on the moment frame.
Any input is greatly appreciated. Thanks.
RE: Composite Infill Beam Camber in Moment Frame
On a side note -- With only a 3/4" camber I would highly consider upsizing the beam a little bit to remove the camber. It's my understanding most steel fabricators would prefer a little extra tonage in exchange for eliminating the camber. Something to run by your steel guy if he is on the job.
RE: Composite Infill Beam Camber in Moment Frame
RE: Composite Infill Beam Camber in Moment Frame
RE: Composite Infill Beam Camber in Moment Frame
RE: Composite Infill Beam Camber in Moment Frame
Infill beam span is roughly 40'. Currently, we do not have a steel guy on board yet. To eliminate camber, I would have to upsize the infill beams by about 10 lb/ft of weight (from my research, 5 lb/ft is a typical break even point between cost to camber and cost of additional weight of steel).
RE: Composite Infill Beam Camber in Moment Frame
RE: Composite Infill Beam Camber in Moment Frame
This is very much my gut feel as well given your parameters.
Neat. I'd not heard of this. Could you direct me to any references? I'd like to check them out for myself.
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: Composite Infill Beam Camber in Moment Frame
RE: Composite Infill Beam Camber in Moment Frame
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: Composite Infill Beam Camber in Moment Frame