Barry,
I'm trying to understand what you said about the base moving. What I think
I understand, the concrete base of your tower moved about 2" horizontally
and broke up the pavers at ground level?
If this is the case, wow! In fact, amazing. I've never heard of such a
thing happening. All I can think is that your ground is really soft.
If this is the case, then yes, your tower certainly held up well, in my
mind, beyond its ratings.
Ray,
N6VR/W7YA
On Thu, May 28, 2020, 9:17 AM Barry Merrill <w5gn@mxg.com> wrote:
> "From what I understand, UST rates the 72 foot crank up towers at
> 200 lbs antenna(s), rotor and mast, bearing etc weight with
> 22 lbs of cable weight, 222 lbs max vertical dead weight."
>
> My UST 72 was installed in 2003 with a 9x9x9 concrete base,
> The tower has
>
> OB16-3 Triband 132
> CAL-AV 40 163
> Cable/Rotator 50
> 345 pounds
>
> I did have the tower fully extended a number times early on,
> lowering it for most storms, but several times I misjudged
> the storm's arrival and it took a beating, and then a final
> time when I was unable to lower the tower as it moved in
> the wind convinced me to give up the extended height,
> and since then it's been about 10 feet extended, enough for
> the Cal-AV to be at 30 feet, (which is still an amazing
> performer, beating locals with stacked 2 el HyGains)
> and the OB=16-3 at 50 feet and the tower positioned so
> the rotator can be removed.
>
> But those several instances of extended with wind
> have left their mark. We had added a pretty stone patio
> across the top of the base and around the base area
> and now all four sides have broken and appear to
> have moved about 2 inches vertical on each side!
>
> I surely can't complain to UST with my overload!!
>
> 73
>
> Barry, W5GN
>
>
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