On 9/22/2016 19:03 PM, jimlux wrote:
The tops of all three sections have guy points. Every temporary cell
site tower I have ever seen were all guyed at the top if each section.
Yes, most ham type crank ups are not designed for guying the upper
sections. But these aren't ham towers.
I'd think that's a "dont fall on someone restraint" more than a "support
the tower in a strong wind" kind of guying. unless the hoist cable and
hardware were really burly compared to the guying. If the guys are out
at 45 degrees, then the down force is 1.4 times the guy tension. I
suppose that if the guys were, say, 1/4" and the hoist cable was 1/2",
the guys would fail before the hoist cable
Or, it's "make sure the tower falls in a heap if it gets overloaded"
COWs (Cellsites On Wheels) come in MANY different configs. Often the
purpose of the guys is to prevent overturning (for lack of outrigger
footprint), in which case guying just the bottom section is all you need.
That said, it's amazing how little engineering direction comes with the
installs. It's a seat-of-the pants operation, kinda like Field Day!
-Steve K8LX
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