On 7/13/18 6:11 AM, W0MU Mike Fatchett wrote:
The problem with the trailer is that it should be "guyed" in three
directions 50 ft from the front and the outriggers. I have not found
the original owners manual so I am not completely sure how effective the
guys really are. I found a great manual online that a club put together
for their Field Day ops. They drive rebar in the ground with a washer
welded at the end for the tie offs.
Speaking cynically, I think those "stakes in the ground" are more to
provide a secure anchor point for the guyline so that it holds up when
someone trips over it in the dark. And to mark the approximate "fall
radius" for the tower, so you can make sure you don't set up an
operating tent within that radius.
I doubt they have any signifcant pull-out strength, so if the wind comes
up, the stake will bend, pull out, and over the tower goes.
*real* temporary installations designed to withstand significant wind
(or seismic) loads will use auger screw anchors, or these days, I've
seen a lot of use of "big blocks of concrete" or K-rail/jersey barrier.
The truck drives up with the rented weights, a crane or forklift puts
them in position, and you're done. The purpose designed weights are
about 5000 pounds, with a big steel loop on the top to attach a guy to.
They're roughly a cubic yard in size.
You could probably also use FIBC (Flexible Intermediate Bulk Carrier)
bags full of gravel as weights. They are also in the 5000 pound range.
They're surprisingly inexpensive to rent - $5/day kind of numbers. It's
the delivery cost that might be pricey.
W0MU
On 7/12/2018 8:15 PM, john@kk9a.com wrote:
With all of the HOAs, I'm guessing that this would be more valuable on
the
trailer.
John KK9A
To: towertalk@contesting.com
Subject: [TowerTalk] Mobile Tri-ex 70 tower
From: W0MU Mike Fatchett <w0mu@w0mu.com>
Date: Thu, 12 Jul 2018 18:08:20 -0600
Can you remove the tower from the trailer and mount these on a concrete
base?
W0MU
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