the lumber on the concrete is necesary ?
i remember the mail boxes use a similar 4x4 and can be mounted using this
anchor, is very simple, is like a nail on the bottom and a simple mount
where you can put your 4x4 , i remember see this in home depot, maybe a
local lumber have some or any other big store , if you get the idea you
will save some money and time , you can build your own stronger version
exactly at your needs, maybe a piece of steel with a big angle in the
bottom to get the sufficient anchorage to this 20 ft 4x4 you will have 4
more ft on the air, i think you will need some guy wires but just to have a
little more stability.
i hope you get my idea.
----- Original Message -----
From: "Derek Cohn/WB0TUA" <email@example.com>
Sent: Tuesday, October 26, 2004 9:45 PM
Subject: [TowerTalk] Mounting a 4x4 in concrete
> Dear All,
> I'm trying to elevate my very low dipole that is fed with balanced line.
I'm trying to go with a non-metallic support so the balanced line does not
interact. My dipole is currently 18' in the air.
> I recently purchased a 22' fiberglass mast from The Mast Co. This is
their heavy duty windsock pole. I'm planning on mounting it to a 20'
redwood 4x4 with the Kwik-Block mounting blocks they also sold me. I plan
to set the 4 x4 in concrete.
> I checked around and one of the local deck builders says I need to put
about 4' of the redwood 4x4 into the concrete. That would reduce my
effective height of the 4x4 to 16'. If I overlap the fiberglass mast a foot
or two, I have 16' + 20' = 36' which is roughly double the height I have
> What do you guys think about the 4' of 4x4 into the ground. Too much, too
little, just right? I noticed that you can put l-bolts into the concrete
footer and mount a u-shaped bracket on top of the footer that will accept
the 4x4. This is advertised for deck applications and I think it wouldn't
support 20 feet of 4x4. However, it would give me four more feet of height
if it could be made to work. Has anyone tried this?
> Derek Cohn
> Morse Telegraph Club - Alton Chapter
> Telegraph Office UD, sine DJ
> Amateur Radio Station - WB0TUA
> 1969 M274A5 Mechanical Mule
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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