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RE: STRUCTURAL STEEL: Large Pipe Column?

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Any reason you can't build up the pipe column on the outside? You could turn
this into a composite section by welding pieces of flat bar as stiffeners on
the outside, say eight pieces equally spaced and running parallel to the
pipe centerline. That would increase the section modulus and the area quite
a bit and wouldn't be that big a deal to fabricate. If I understand your
problem, this is a cantilevered sign support, so you would only have to
carry the stiffeners part way up the pole.

-----Original Message-----
From: Bill Polhemus [mailto:bill(--nospam--at)polhemus.cc]
Sent: Thursday, February 28, 2002 11:44 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: STRUCTURAL STEEL: Large Pipe Column?


Well, can't do that for reasons previously mentioned.

Also, my biggest problem isn't concentric loading, it is high moment.



William L. Polhemus, Jr. P.E.
Polhemus Engineering Company
Katy, TX, USA
Phone (281) 492-2251
FAX (281) 492-8203
email bill(--nospam--at)polhemus.cc

-----Original Message-----
From: Sprague, Harold O. [mailto:SpragueHO(--nospam--at)bv.com]
Sent: Thursday, February 28, 2002 10:25 AM
To: 'seaint(--nospam--at)seaint.org'
Subject: RE: STRUCTURAL STEEL: Large Pipe Column?


Go composite.  A 20" diameter column filled with 3500 psi concrete has an
allowable concentric load of 1191 kips for a 20 ft. long column.



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