My neighbor who is in construction says all I have to do is dig around the
existing block and drill some holes in the side and push some rebar into the
holes. I'm planning on putting more rebar where the new concrete will go. As
for depth, I plan on leaving the original depth at 3 feet and go to 4 feet
where the new concrete "surround" goes. From what I've been reading, the
cementing should be no problem.
Bob W6TR
----- Original Message -----
From: Jim Lux
To: Bob Maser ; garyschafer@comcast.net ; 'Talk Tower'
Sent: Monday, February 12, 2007 5:54 PM
Subject: Re: [TowerTalk] Tower foundations
At 12:27 PM 2/12/2007, Bob Maser wrote:
I'm not worried about saving 1 yard of concrete. I want to put the new
tower in the same location as the old one(wife's requirement) and I believe
that a yard of hardened concrete weighs too much to just pull it out of the
hole and start over.
Are you going to then just dig around it? you said the new base would be 4
ft deep and the old one is 3 ft.. So you're going to raise the top surface a
foot, as opposed to digging under the block, or leaving the old block sitting
up on a soil pedestal 1 foot high?
There's a bunch of funky things you can do to bond the old and new
concrete together, but I don't know if they're needed in your case. I've been
watching them widen a freeway on my daily commute, and there's all kinds of
things they do with respect to bashing off the old wall on the side of the
bridge, casting the new slab next to the new one, and building the new side
walls. Freeway construction is probably a bit different than antenna bases,
though. Fascinating to watch.. they grind up all the old concrete to be used as
aggregate (or maybe gravel footing under the new concrete). I still haven't
figured out if the big grinder is rebar immune...
Bob W6TR
----- Original Message -----
From: "Gary Schafer" <garyschafer@comcast.net>
To: "'Bob Maser'" <bmaser@tampabay.rr.com>; "'Talk Tower'"
<towertalk@contesting.com>
Sent: Monday, February 12, 2007 2:31 PM
Subject: RE: [TowerTalk] Tower foundations
> For the cost of saving one yard of concrete I would think it would be a
> whole lot more expensive and work than starting over.
>
> 73
> Gary K4FMX
>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com [mailto:towertalk-
>> bounces@contesting.com] On Behalf Of Bob Maser
>> Sent: Monday, February 12, 2007 1:04 PM
>> To: Talk Tower
>> Subject: [TowerTalk] Tower foundations
>>
>> I have a 3x3x3 foot concrete foundation in my front lawn that I have been
>> using for my HyGain HyTower antenna. MY plan is to remove the HyGain and
>> enlarge the foundation to 6x6x4. I have heard that it is possible to
>> hammer
>> drill holes in concrete, pour in a 2 part epoxy, and insert threaded rods
>> and this will be strong enough to be used for attaching a tower. I want
>> to
>> put up 60 feet of Rohn 65 and have it be self supporting unless a
>> hurricane
>> comes through the area, in which case I would put temporary guys on the
>> tower. Does anyone have experience with this epoxy method and can give
>> me
>> some direction on doing this?
>>
>> Thanks,
>> Bob W6TR
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
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