Lately there has been discussion of tower bases and installations as in
Greg's message below, and I am also in the process of relocating a tower with
the
attendant problems of digging the hole, stabilizing the hole (sandy soil),
rebar framing and finally pouring the concrete.
I thought that was a lot of work and expense until I ran across the following
series of pictures of a Japenese ham's tower installation. Suke JM7OLW must
have one of the most expensive tower support systems ever constructed. Take a
look at his site - http://www.geocities.jp/jm7olw_suke/KT35SR.html Albeit it
is a big tower, that is a lot of concrete work. He also has an outstanding
signal on 40m CW most mornings.
Regards,
Norm W4QN
===============================================
Message: 8
Date: Sat, 7 Oct 2006 17:19:48 -0700
From: "AB7R" <ab7r@cablespeed.com>
Subject: [TowerTalk] Tower base advise
To: <towertalk@contesting.com>
Message-ID: <NPEPLDGLIFKDGPHGAGOMMEHJEOAA.ab7r@cablespeed.com>
Content-Type: text/plain; charset="iso-8859-1"
Not sure if I over did this or not. My neighbor brought his backhoe over
this afternoon to dig the foundation for my HG-70HD tower and raising
fixture.
The specs only call for a 4x4x8 hole. While we did not quite hit 8ft (a bit
over 7 in the middle), the dimensions came to 6.5 x 6.5. Thats 270 cubic ft
vice 128. Is the slightly shallower depth going to make a big difference?
I attached a couple pics.
I hope to schedule the concrete pour for this week. 4000 psi and gonna have
it poured pretty wet. Do I need to get one of those vibrating things or is
pouring it wet sufficient?
Thanks
Greg
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