Not to start a big discussion, but as long as you 'ONLY' guy the bottom section
of the tower It can be guyed.
That is to say, not guy any of the 'cranked up' sections.
Pinning the movable sections, like an extension ladder steps will only transfer
the stress to the rung, cross member, ect
that is rests on. Something that is surly NOT designed for that stress.
Ya must remember its like building hot rod cars when we were kids: big motor,
runs fast. but who thinks about upgrading the brakes
untill its time to stop? In other words, the tower companies spend a lot of
mony engineering the tower.
UNLESS, you also do the same; what makes your design safe, better, strong???
Just food for thought... Have you ever SEEN a tower come down? they twist
into the ground.
Date: Wed, 07 May 2008 22:02:20 -0400
From: jim Jarvis <firstname.lastname@example.org<mailto:email@example.com>>
Subject: Re: [TowerTalk] ma550 guying
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Ignoring, for the moment, the prime directive, let's look at what
you're doing if you
guy a crankup tower.
The lateral forces on the tower, which cause it to flex and shed
load, are transferred to
the guys, and to the vertical structure itself. With a crankup,
that means to the hoist cable!
The cable is not specified for anything more than lifting the weight
of the tube, with some
Thus, adding guys to the ma550, or any similar light duty tower, will
NOT increase its load
capacity, or its safety, but will reduce it.
Now, if you upgraded the winch cable, carefully calculating the
downforce resulting from the
increased load area you plan, and the increased wind zone withstand
which the zoning requires,
you COULD add capacity to the structure. But in that case, be
prepared to present an engineering
wet seal to your zoning people to justify the structural decisions.
It's a whole lot easier and cheaper to follow the prime directive,
don't you think?
Jim Jarvis, MBA
The Morse Group, LLC
732 548 5573 office
908 410 9130 cell
Achieving Results in a Changing World
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