[TowerTalk] RE: Installing Tower Bolts

[Bill VanAlstyne]

I remember reading somewhere recently -- and I'm going to research it now, as
I'm planning to pour a UST foundation soon myself -- that you should NOT tie the
bolts to the rebar, because you want the bolts to transfer their loads directly
and evenly to the concrete, not the rebar. Anybody else have a recollection of
reading that adminition?

Bill / W5WVO


Terry Dunlap wrote:
> This brings up a question that I've had for a while.  It's always
> recommended that  the bolts get
> tied to the rebar in a new base installation but it seems to be
> accepted
> practice to retrofit an
> existing base for a different tower by using epoxy anchors.  These
> anchors
> aren't tied to the
> rebar in any way and would be the same as NOT tying bolts in a new
> pour.  Isn't this a
> contradiction or at least an inconsistency?
>
> 73 de Terry KK6T
>
>
>
> At 10:28 AM 10/1/2004, FireBrick wrote:
>> As a licensed mason contractor I was frequently asked to help DIY
>> hams
>> pour bases.
>>
>> wire tying rebar to the bolts is a must, both around the perimeter
>> and
>> with diagonals across the center.
>> In addition, I used bolts above and below the bolt template, well
>> tightened.
>>
>> Those tricks took a few minutes to prepare, but saved many minutes
>> during and after the pour.
>>
>>
>> ----- Original Message ----- From: "Bill Turini" <wtu at cypress.com>
>> To: <towertalk at contesting.com>
>> Sent: Friday, October 01, 2004 12:18 PM
>> Subject: [TowerTalk] RE: Installing Tower Bolts
>>
>>
>>> There was a comment made regarding welding tower bolts together at
>>> the base to ease installation.  I ran into problems with my recent
>>> installation and have a plan for my next tower base. :-)
>>>
>>> I built the base per the engineering drawings, and hung the 4' long
>>> bolts from the tower baseplate per the factory recommendation. When
>>> we poured the concrete into the hole, the bolts were just hanging
>>> there, flapping the the breeze, so to speak. We had to halt the
>>> pour to reposition the bolts three times, and they never did end up
>>> vertical.
>>>
>>> On the next tower, I'm going to tie rebar horizontally across the
>>> rebar cage and secure the bolts to it. That way they'll end up
>>> correctly spaced vertically and horizontally. As I said, they're
>>> very close, but we had a problem keeping them in position during
>>> the pour.
>>>
>>> As and aside, the concrete pumper got "constipated" during the pour.
>>> Boy, I never saw grown men work so fast to try to get it cleared! I
>>> guess the thought of all that concrete in the tube and the hopper
>>> was a bit daunting.
>>>
>>> The driver ended up calling in the firm owner and other drivers. I
>>> ended up with four folks from the concrete pump firm doing the
>>> pour. My contractor and his guys just stood and watched.
>>>
>>> Bill
>>>
>>> Bill Turini                         (425) 787-4477
>>> IT & Facilities Manager
>>> Cypress Semiconductor               Lynnwood, WA  98037
>>>
>>>
>>> _______________________________________________
>>>
>>> See: http://www.mscomputer.com  for "Self Supporting Towers",
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>>>
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>>
>>
>> _______________________________________________
>>
>> 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
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>> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
> 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
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> http://lists.contesting.com/mailman/listinfo/towertalk