I think you're over-generalizing this topic.
On larger commercial towers, one ALMOST never sees guy brackets
encircling the tower (except for the guy levels requiring a 6-way star
guy). The normal attachment is via a heavy tab welded directly to a leg.
The tabs are generally located at horizontal braces, so that the guy
forces ARE distributed to all three legs. Rest assured that the towers
are engineered properly.
-Steve K8LX
On 1/14/2017 21:15 PM, Roger (K8RI) on TT wrote:
The Farwell MI 2-meter repeater was on a commercial tower about the
equivalent a city block distant from our house when we lived up there.
I did the antenna maintenance. I had to climb around a guy bracket that
was made of either 3/8ths, or 1/2 inch steel that completely enclosed
the tower. Similar plates were used higher up. Guys were 1" and looked
like wire rope. The tension? Hit one at the tower and it'd ring like a
high pitched tuning fork well above middle C.
Whether u-bolted, or wrapped around a leg, using a single leg, weakens
the tower at that point. If engineering determines the tower load is
insufficient to cause a problem, then it's fine, but I wonder what the
insurance co would say if it failed? Now days they have become very
cost conscious and look for ways to invalidate coverage.
The guy bracket on larger towers is u-bolted to the tower leg and
bracing,
it does not encircle the tower. It is not necessary to encircle the
tower.
My Rohn guy brackets look like this
https://www.dxengineering.com/parts/roh-ga65gd
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|