[TowerTalk] Mobile Towers

[Jim Rhodes]

Yes, I think some of it is "make sure the tower falls in a heap", upon
close inspection the towers seem to be pretty light construction. Bracing
diagonals are tubing and bolted together. Might be OK for Field Day type
operations, but I think I would still use at least rope guys all the way
up, for the same reason. Sure wouldn't take the tower off the trailer and
try to mount it somewhere.

On Thu, Sep 22, 2016 at 7:02 PM, Steve Maki <lists at oakcom.org> wrote:

> 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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