[TowerTalk] Tower Base In Concrete

[Hank Lonberg]

Steve:

First of all why do you want to attach the tower section to
the rebar. This would serve no useful function unless you are
trying to hold the section up while you pour the base. Just
attach some 2x lumber to the legs and support on top of the
forms this takes the load off the rebar cage. 

Next the tower section is worthless as foundation
reinforcement, sorry Mark. It has little area and what area it
has is in the wrong direction to do any good as reinforcement.
The reinforcement in the base is horizontal not vertical. Just
put in #4 at 12" each way top and bottom with 3" clear from the
sides top and bottom.

Regards
Lonberg Design Group, Ltd
Hank Lonberg, P.E.,S.E.
President


-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Mark
Robinson
Sent: Saturday, April 24, 2010 8:13 AM
To: Tower and HF antenna construction topics.
Cc: n2mai at arrl.net
Subject: Re: [TowerTalk] Tower Base In Concrete

The Rohn drawing shows the Rohn 45 sticking 2 inches into the
bed of 
drainage gravel. If you are burying a tower section then the
Rohn drawing 
doesn't require a rebar cage as the  buried section of the
tower functions 
as rebar.

What tower are you installing? I am in the process of
installing a Rohn 45 
and Rohn 25 tower.


73 Mark N1UK



----- Original Message ----- 
From: "Steve Bagley" <n2mai at arrl.net>
To: <towertalk at contesting.com>
Sent: Friday, 23 April, 2010 3:06 PM
Subject: [TowerTalk] Tower Base In Concrete


>I am installing a base of my tower directly into the
concrete.  If I place
> a layer of sand or crushed rock at the bottom of the hole
for drainage,
> should I place the base directly onto this rock for
drainage?
>
> My quandry arrises considering I want to attach the tower
base to the 
> rebar
> cage, and the cage must be totally enclosed in the concrete.
If I have 
> the
> tower legs sticking out of the concrete, will this present a
corrosion 
> issue
> or have an effect on the Ufer ground?
>
> Appreciate your thoughts and comments!
>
> Steve, N2MAI
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk 

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