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Re: Pipe Column Erection

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It costs. I have a copy if someone needs a page or two scanned, "fair use" 
wise.

W. L. Polhemus, Jr. P.E.

4

> On Jan 15, 2014, at 10:02 AM, "nma" <nma(--nospam--at)nma-se.com> wrote:
> 
> Start with "Tubular Steel Structures - Theory and Design" by Troitsky.  I 
> think that you can obtain a copy from Lincoln Arc Welding. Is the column 
> straight or tapered? 
> The analysis is pretty straight forward is you have experience in pole 
> type structures.  When I get into areas outside of my expertise, I turned 
> to part of my eight member independent group team for assistance. 
> http://en.wikipedia.org/wiki/Aqaba_Flagpole.   This is a tapered pole 
> structure with the weight and windage of an ornament at the top.  A lot 
> is going to depend on the earthquake susceptibility as well as the wind 
> issues and possible extreme temperatures.  There are a number of 
> excellent studies out of Texas that deal with fatigue and microcracking. 
> The new AASHTO code for poles has a revised chapter on fatigue - 50 year 
> life is now "infinite life".   The AASHTO code for poles also provides 
> good guidance for pole design.  Just add in your supported tank weight 
> and the windage and go. Don't forget that the foundation may also impact 
> your design, depending upon whether you have a spread footing, a caisson 
> footing or and pier with a cap footing.  The last thing you want is for 
> the structure to tilt. N/ _*www.nma-se.com*_ 

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