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RE: Rolled Wide Flange Beams to Trolley Around Corners

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You will need to do a torsional analysis on a wide flange that includes
warping effects and pure torsion.

Gerard Madden, P.E.
Civil Engineer, Associate
CRJ Associates, Inc.
email: gerardm(--nospam--at)
tel: 650.324.0691
fax: 650.324.0927

> -----Original Message-----
> From:	Ed Fasula [SMTP:tibbits2(--nospam--at)]
> Sent:	Wednesday, October 06, 1999 1:42 PM
> To:	seaint(--nospam--at)
> Subject:	Rolled Wide Flange Beams to Trolley Around Corners
> I have completed step 1, found a machine shop to roll a wide flange beam
> with a 3 to 4' radius.  Step 2 is to figure out what's left of the beam
> afterward.  The point here is to allow a trolley to roll around a corner
> in
> a plant.
> The machine shop cold rolls the beams, and claim they can do it without
> the
> flanges buckling.  We only have to support about 5.5 kips, and we can
> shorten the span to just about anything.  I would think that the beam
> would
> become stronger from cold-working.  Lateral stability, I would think,
> wouldn't be an issue if the beam is supported in the center of the bend.
> Local buckling of the inside flange, that I would think would be a little
> wavy from the process, seems to be the bugger.
> Am I on the right track here (no pun intended)?  Is there some kind of
> standard practice someone could clue me in on?
> Thanks.
> Ed Fasula, E.I.T.