Star guying substantially reduces the twist on a tower. Torque arms are
much less effective. According to K7LXC : When Rohn implemented one of the
early EIA/TIA-222 tower standards, they found that the torque arms added
nothing to the torque resistance of the tower but they do help stabilize
the tower as it's being climbed.
John KK9A
To: Gregg Seidl
Subject: Re: [TowerTalk] guying question
From: "Roger (K8RI)"
Date: Fri, 25 Jul 2008 20:16:18 -0400
Gregg Seidl wrote:
> This is something kinda new to me.I'm going to use a torque bracket for
> the
> top most guy set on 2 of my towers.I've never used these before.It seems
> the
> bracket gets clamped around the tower.Do you need to put a U clamp under
> the
> bracket so it can't slide down under force.
>
The bracket is the same bracket that *should* be used to attach the
normal guys. With my 45G the only difference is the hardware that goes
into the ends of the brackets.
At each tower leg there is a shorter bracket that runs between the outer
pieces, but goes on the inside of the tower leg. These things are well
mounted and take the stress of the guys off the individual tower legs.
If you have a large wind load and the tower base is in concrete it
greatly reduces to torque down through the tower to the base. With the
tower set on a pier pin it reduced to pull due to rotation on each guy
line which again can be considerable when figuring the leverage between
the tower center and legs. The longer torque arms reduce this
substantially. OTOH most installations don't come near needing them.
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