Composite Beam - Defl limit under wet weight
Composite Beam - Defl limit under wet weight
(OP)
We use an in-house rule of thumb to limit an uncambered beam to L/800 for the steel beam under the wet weight of concrete (anything > L/800 requires camber).
I'm one of those anal people that likes to see things written down in a code, or a recommendation from a technical guide, etc. I don't like things out of left field; I like to know the methodology behind them.
Does anybody know where this info could be found?
And what are everybody else's limit before you decide a beam needs camber?
I'm one of those anal people that likes to see things written down in a code, or a recommendation from a technical guide, etc. I don't like things out of left field; I like to know the methodology behind them.
Does anybody know where this info could be found?
And what are everybody else's limit before you decide a beam needs camber?






RE: Composite Beam - Defl limit under wet weight
RE: Composite Beam - Defl limit under wet weight
RE: Composite Beam - Defl limit under wet weight
RE: Composite Beam - Defl limit under wet weight
I think I like your rule better, except I would think anything over L/800 or 3/4" requires cambering or shoring. I assume that shoring costs less than cambering.
Best regards,
BA
RE: Composite Beam - Defl limit under wet weight
ftp://imgs.ebuild.com/woc/C970734.pdf
Also look for a paper by John Ruddy for Ponding of Concrete Deck Floors
RE: Composite Beam - Defl limit under wet weight
RE: Composite Beam - Defl limit under wet weight
I believe they will show a mill tolerance for some allowable camber in the as rolled condition. Therefore, since beams will come with some curvature, designing for less than that amount is not productive as whatever it is is still within tolerance.
If you use the AISC steel manual, you will probably still have excerpts from ASTM A6 at the end of the first chapter and the notes on mill camber are reprinted there (they are in my slightly older version which was printed on papyrus).
Good luck.
RE: Composite Beam - Defl limit under wet weight
RE: Composite Beam - Defl limit under wet weight