camber in steel beam
camber in steel beam
(OP)
I have a beam that will span about 60 feet (simple span). Beam DL+LL deflections are better that L/360. I have been thinking about cambering the beam. I have two questions:
1. Should I request and specify camber or should I love with mill camber for this length of span?
2. If I to specify a camber, how much? Just enough for the dead load camber?
Any input and thoughts would be appreciated.
1. Should I request and specify camber or should I love with mill camber for this length of span?
2. If I to specify a camber, how much? Just enough for the dead load camber?
Any input and thoughts would be appreciated.
Regards,
Lutfi






RE: camber in steel beam
When things are steep, remember to stay level-headed.
-Horace
RE: camber in steel beam
Dik
RE: camber in steel beam
AISC Manual, 9th Edition, has a good discussion about cambering on page 1-147.
Also, see this article in the July 2006, issue of Modern Steel Construction
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...and this one in the September 2004 issue (a reprint from 1989)
http://
www.SlideRuleEra.net
RE: camber in steel beam
http
When things are steep, remember to stay level-headed.
-Horace
RE: camber in steel beam
Regards,
Lutfi
RE: camber in steel beam
MSC Specifying Camber Article
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
RE: camber in steel beam
We have done several office type buildings in our office with floor bay spans of 60 to 64'. We camber for 75% of the dead load, and this seems to work out well. Even though the floor beams are modeled as simple spans, the end connections (to girders or columns) do in fact have some rotational restraint. They are not perfect pin connections. The 75% is an fairly arbitrary number, but it seems to have worked well for us over the years.
In addition, we generally factor in an extra 1/2" of concrete in our loads to allow the contractor to pour a level floor. We specify a 'level floor', not a 'constant thickness' floor. Again, this seems to have worked out well for us over the years.
RE: camber in steel beam