Just for what it is worth - in the Florida county where I live, a
building permit is required to put up a tower. I know that many hams put
up towers without a building permit but if the
tower falls on your house or your vehicle (or your neighbors), your
insurance company will deny your claim faster than an ice cube will melt
in boiling water. For only $300, US
Tower supplied sealed engineering drawings, rated at 135 MPH in the
nested position, for my 55 ft Crank-up. The sealed drawing specified the
base and every other aspect of the
tower installation. The US Tower engineer is a pleasure to work with but
trying to obtain a delivery date is problematic (you're behind the DOD
in terms of schedule). Hope this add something to the discussion. 73's,
Dave, K4CTV
PS - Received the building permit withing a few days.
On 7/3/2013 10:54 AM, Larry Loen wrote:
I agree with N4ZR here.
Find out what is required, especially of the base. It isn't just something
to keep the tower from sliding around. It is the _foundation_ of the whole
tower. The house bracket can be thought of as merely an alternative to
guying at the corresponding height.
The base AND the bracket needs to be engineered by somebody who knows, you
know, engineering. That definitely includes how the bracket is attached.
Even a small tower is a potentially serious thing. Do you really want to
have it toppled over after having taken a big chunk out of your roof?
Somebody who knows engineering can help with this. And, the expense need
not be all that great. Maybe 300 to 500 bucks. Cheap compared to a bad
outcome. Might even be needed by the local county zoning board anyway.
Larry Wo0Z
On Wed, Jul 3, 2013 at 5:48 AM, Pete Smith N4ZR <n4zr@contesting.com> wrote:
I can't overstress Dan's first point - do what the manufacturer says.
From the web site: " LPT's need to be either bracketed to house or
vehicle, guyed or rigid guy supported."
Are you buying this new, or used? In either case, I would get in touch
with the company. They also say
/*"Standard: */12" x 12" base for (4) foundation bolts, 40:1 worm winch
/*Options*:/ House brackets, powder coat finish, X-base, T-bar extensions,
rigid guys hidden cable, 5th section (2" square), custom-cut section
lengths"
House brackets for a Rohn 25 tower are a whole different animal - but any
house bracket may require reinforcement of the wall to which it is mounted.
I recall an article a few years ago about putting 2X6 braces in an attic
to hold the bracket securely
There is no illustration for the 1242 or the other taller ones, but the
smaller ones make it pretty clear that what they are talking about is
guying or bracketing the base section, because the upper sections move up
and down. Still, call and ask them!
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 7/2/2013 10:51 PM, K0DAN wrote:
It depends on what you buy (follow mfgr specs) however if you are going
to do a house-bracketed tower, see if you can download the Rohn specs for
their Model 25 tower, which, if IRC requires a small pad and allows maybe
20-30' above the roof bracket, depending on your antenna + wind load. The
Rohn specs may not be the right match for your new tower, but they will
help you understand what is required of you for a qualified installation.
All this assumes your state/local governments won't require you to jump
thru other hoops.
Later comes grounding, choice of antennas, rotor, feedlines, etc., etc.,
however the Rohn specs are easily obtained and will get you in the ballpark.
Also, as plugged by others, the "UP THE TOWER" book (
http://www.championradio.com/**UP-THE-TOWER-The-Complete-**
Guide-To-Tower-Construction.1<http://www.championradio.com/UP-THE-TOWER-The-Complete-Guide-To-Tower-Construction.1>)
contains a wealth of information...if this is your first tower, the book
will pay for itself many times over.
Good luck and 73
Dan
K0DAN
-----Original Message----- From: PHILIP GRAITCER
Sent: July 02, 2013 21:22
To: towertalk@contesting.com
Subject: [TowerTalk] Very new to this
After 55 years in amateur radio, I am about to get my first tower, a
Force 12 LPT42. I live on a salt marsh, directly facing the ocean, hence
the need for a low profile.
But once the tower comes, I have no idea how to get it up. I am planning
to pour a pad and strap it to the house.
But can this collective braintrust point me to a how to manual, or even
someone in the South Georgia area who can guide me?
Thanks,
Phil, W3HZZ
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