Larry-
I'm in the process of finishing up a 73' US Tower install.
If you are getting a building permit to put it up, I would follow tower
manufacturer's instructions to a Tee. If not, you run risk of not getting a
sign off.
Even if you are not getting a permit, changing the foundation is asking, in my
opinion, for problems. I have seen the design engineer's calculations for the
foundation and it is pages of heavy duty stress/strain formulaes.
Regards,
Dick, K0CAT
> On Oct 12, 2017, at 1:57 PM, Bob Farkaly <bob@farkaly.com> wrote:
>
> Larry,
>
> Having installed a 70 ft self supporting tower in 4 parts of the US, and
> seeing for myself the complex stresses
> imposed on the base, I wouldn't deviate from the manufacturers'
> specifications.
>
> My $.02 (US)
>
> Bob, K9RHY
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> marsh@ka5m.net
> Sent: Thursday, October 12, 2017 1:42 PM
> To: 'Larry Horlick'
> Cc: towertalk@contesting.com
> Subject: Re: [TowerTalk] Concrete base - tower
>
> Unless you are a Civil or Mechanical Engineer and can do all the calculations
> to confirm that your redesign is
> in fact "equivalent", I recommend you follow the manufacturer's design and
> specs exactly.
>
> 73,
> Marsh, KA5M
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Larry
> Horlick
> Sent: Thursday, October 12, 2017 12:00 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] Concrete base - tower
>
> I am preparing to install a 70' Trylon SuperTitan S500. Nothing is done at
> this stage...I'm thinking about
> pouring the base first. Hi.
>
> The manufacturer has supplied a drawing of the required concrete base. It is
> a pad and pier design. Doing a pad
> and pier is significantly more work (i.e.
> creating the form) than, say, just a rectangular block that I could simply
> pour in the hole with very little
> form work.
>
> My question is...Can do that? Can I change the pad/pier to a block, by
> altering the dimensions, amount of
> rebar, etc. to arrive at an "equivalent"
> to the pad/pier??
>
> I welcome any relevant comments/questions/suggestions.
>
>
> Larry
> VO1FOG
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