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Design of Curved Steel Beams

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I have a copy of the USS Steel Design Manual, which is my favorite
torsion design reference.  The copy I have was printed in May 1974; I
believe there are newer editions, but I doubt it's still in print.

I also have a copy of an AISC Engineering Journal article by Philip Lin
dated 3rd Quarter 1977, which looks useful but which I have not used in

I agree with Bill's generalization--bridge designers can put in cross
frames which will eat the torsion and convert it to vertical loads at
the adjacent beams; USS (I think) had a design method called V-Load
Analysis which calculated this.  But often, curved beams are on their
own in a building.

Mike Hemstad, P.E.
St. Paul, Minnesota

29                               Message:0029
From: "Polhemus, Bill" <bill.polhemus(--nospam--at)>
Subject: RE: Design of Curved Steel Beams
To: seaint(--nospam--at)

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From: Stanley E Scholl [mailto:sscholl2(--nospam--at)] 
Sent: Thursday, June 09, 2005 11:48 PM
To: seaint(--nospam--at)
Cc: seaint(--nospam--at)
Subject: Re: Design of Curved Steel Beams

I believe USS had a good booklet on this-about 15 yrs. ago. I will see
if I can find it out in my garage. These are quite common in bridges.

But the thing is, with bridges you typically have these girders in
parallel--at least two if not three--and they are massive.
I think design of curved beams in buildings tends to be quite a bit more

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