Mike,
All kinds of recalc introduced by what you suggest doing.
I believe, for sure, the rating would actually drop below 10 sq ft., the
normal HDBX56 ft rating, because you're raising all sections above the BX7
section 8 ft. and therefore above their normal distance above sections BX7
and BX8, the two lowest sections.
This would put more bending moment on the base section because sections with
larger wind area are being put farther out on the "lever".
Larry K8PUJ
-----Original Message-----
From: mike dunlap <mdunlap@pressenter.com>
To: towertalk@contesting.com <towertalk@contesting.com>
To: <towertalk@contesting.com>
Date: Friday, September 24, 1999 10:33 PM
Subject: [TowerTalk] Rohn tower antenna sq. Ft.
>
>Hello!
>
>I have a Rohn "BX" series tower, one with a little age on it but in great
>shape, and I'm hoping that someone will have an idea as to the antenna
>square foot load that it will safely accept. The Rohn spec. book will not
>help, at least the new one.
>
>The tower is basically an HDBX 48 with an extra BXS7 section which is
>straight and mounts above the BX8 base section and below the standard BX7
>section. My guess would be that of 14 square feet as the HDBX 48 handles
>18 (top section being the BX3) and the BX56 handles 10 (top section being
>the BX2). Any other "guesses" would be appreciated!
>
>If someone is familiar with this type of tower and has the true
>specifications I would very much like to hear from you!!
>
>Thanks for your help!
>
>'73 Mike Dunlap K0NWA
>
>
>
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