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RE: Guy wire forces

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Also see ASCE 7-2002 for ice loads.

Dave Evans



To:             	"'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
Subject:        	RE: Guy wire forces
Date sent:      	Mon, 15 Sep 2003 16:16:02 -0500
From:           	"Sprague, Harold O." <spragueho(--nospam--at)bv.com>
Send reply to:  	<seaint(--nospam--at)seaint.org>
Organization:   	http://www.seaint.org

> I have had occasion to design these structures in the past.  
> 
> You are obviously familiar the ASME STS 1-2000.  
> 
> You should also get the Structural Standards for Steel Antenna Towers and
> Antenna Supporting Structures (ANSI/TIA 222-F-1996 (R2003)) to determine
> wind forces in the guy cable.
> 
> You should also get Tubular Structures by Troitsky which is available from
> Lincoln Electric.  It has a chapter on guyed flare stacks.
> 
> Normally the initial pretension on guy cables is 10% of BS.  The tension
> forces will increase a lot when the flare stack is at operating
> temperatures.  
> 
> Also don't forget about ice accretion loads.  You will find those in ASCE
> Guidelines for Electrical Transmission Line Structural Loading, ASCE 74.
> 
> Regards,
> Harold O. Sprague
> 
> -----Original Message-----
> From: Michael L. Hemstad [mailto:hemstad.ml(--nospam--at)tkda.com] 
> Sent: Monday, September 15, 2003 10:01 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Guy wire forces
> 
> Can anyone recommend a good reference on guyed structures?  We have been
> asked to investigate the guy wire anchorages for a pair of guyed stacks.
> Our first step is to try to evaluate the forces in the guys due to
> pretension and wind.
> 
> Thanks for any help.
> 
> Mike Hemstad, P.E.
> TKDA
> St. Paul, Minnesota
>  
> 
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