On 6/4/2014 12:01 AM, Mickey Baker wrote:
A pole like this is a great find.
A pole set crew with an auger can plant your pole properly in short order.
Digging a hole deep enough to plant it safely is a big job. Think about
hiring a local pole setter. It probably won't be as big a cost as you
think, if they can get the truck to the pole's location. If you plan
properly, they may be able to help you get your initial antenna installed
at the top of the pole. You're likely going to need a crane for the initial
installation.
The next step (pun intended) will be to create a way for you to reach the
top of the pole, unless you intend to hire a bucket truck every time you
want to work on your antenna.
The technique is called a "pole step" - the steps near ground level are
typically done with a mounting plate and lag screw so that you can remove
the step, and those higher are simple lag bolts with a step built in - you
drill a pilot hole in the pole and turn them in.
We use steps like #506125
<http://www.arrisistore.com/product.php?pid=002971>Cheap and relatively
easy to install "BEFORE" the pole goes up. Don't forget to allow for how
much pole will be in the ground.
Instead of the detachable steps, which seems like extra work, we just
used a ladder to get to the first ones.
You can't consider yourself a pole climber unless you know what "hugging
a pole" means and it has nothing to do with country of origin <:-))
I much prefer towers to poles, but it's hard to argue when they are
free. If you can, get the pole thoroughly "treated". well ahead of
installation. They generally get very expensive as the height increases.
73
Roger (K8RI)
There are BSP's that set forth spacing and arrangement... but just make
sure you and your friends can reach each next step, and that you have a
level place to stand where you're going to be working at height.
Be safe. Be conservative when loading antennas, poles can loosen with
sudden torque loads and actually turn, but you should be fine with most
tri-band HF beams.
Step hardware:
http://www.arrisistore.com/subcat.php?cat=ACK
73,
Mickey N4MB
On Tue, Jun 3, 2014 at 10:35 PM, <n0tt1@juno.com> wrote:
BSP's...RIGHT! "My bad" as the kids say these days. :D)
On Tue, 3 Jun 2014 19:30:54 -0700 "Jim W7RY" <w7ry@centurytel.net>
writes:
BTW, there are Bell System Practices (call BPS's)
BSPs And they are on Google.
73
Jim W7RY
-----Original Message-----
From: n0tt1@juno.com
Sent: Tuesday, June 03, 2014 7:01 PM
To: n7qnm-lists@nwlink.com ; TowerTalk@contesting.com
Subject: Re: [TowerTalk] Utility Pole as Beam Support
Lucky you to get such a pole for free!!! :D)
Use NO concrete! The pole will shrink a little over time
and there will be a crack to let water in and stay there,
accelerating the rotting of your pole! Concrete will also
prevent you from making below ground periodic inspections
per the reference suggested below.
Backfill with dirt or use some fine-graded sand that you "water in"
to fill all the voids.
BTW, there are Bell System Practices (call BPS's) that *may*
be posted on the web that describes the proper install, loading,
etc
of wood poles. Google. If not, maybe a dedicated Telco ham
just might have a copy in his personal library!
I'd be tempted to rig the beam and mast with a "tilt-over" feature
using a small winch to make it a no-climb antenna structure. A
"cradle" would prevent side-to-side movement at the top.
Now back to my workbench. :D)
73,
Charlie, N0TT
On Tue, 3 Jun 2014 15:15:05 -0700 "Clay Jackson"
<n7qnm-lists@nwlink.com>
writes:
I just "inherited" a 50' (out of the ground, 6' buried) utility
pole
(crew
was taking it out and told me that if I'd drag it off the road, I
could have
it).
I'm thinking about trying to find a rotator and tri-bander to put
on
top of
it; but, having no experience with such a setup; I thought I'd
seek
some
advice first.
So, a few questions.
I'm sure someone has done this before; would you be able to share
your
experiences?
I have a friend who can weld anything from steel to aluminum and so
I think
we can fab up a mount for the rotor.
Beyond that, thoughts would be appreciated on things like:
Wind loading - how many sq ft (if any) is reasonable before I have
to use
guys (for my HyGain AV18HT the building dept made me engineer the
base for
90K winds, WITH a "wet stamped" drawing)?
Base - is a 6' hole filled with dirt "good enough" or do I need
something
more (if more, would a 6' hole with concrete be sufficient)?
Thanks in advance!
Clay
N7QNM
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