Re: Bridge Construction question

Posted by Jon C -Florida on July 06, 2005 at 18:47:26 from (66.209.40.200):

In Reply to: Re: Bridge Construction question posted by Bus Driver on July 06, 2005 at 18:27:53:

Bus Driver is absolutely correct.

In engineering lingo the "compression flange" (the top of the beam for simple positive bending) must be braced. Normally, but not always the decking acts as a top flange brace PROVIDED it is welded or otherwise firmly connected to the beams. Cross bracing, or welded "diaphrams" made up of channels welded to angle clips inside the webs of the beams is recommended at perhaps 4 to 5 foot centers.

Like Bus Driver says..its to prevent rotation or twisting of the beams and it will allow full design loads to be carried.....otherwise they will fail by buckling at much lower loads.

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