[TowerTalk] Concrete base - tower

[Dick's]

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 at 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 at contesting.com] On Behalf Of marsh at ka5m.net
> Sent: Thursday, October 12, 2017 1:42 PM
> To: 'Larry Horlick'
> Cc: towertalk at 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 at contesting.com] On Behalf Of Larry Horlick
> Sent: Thursday, October 12, 2017 12:00 PM
> To: towertalk at 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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