BX Towers formerly made by Rohn are now manufactured by Thomas Shelby &
Company using original Rohn tooling.
see: http://wb0w.com/shelby/shelby_bx.htm for details, specs etc.
73, Steve - N1SR
At 12:59 PM 7/27/2003 -0400, K7LXC@aol.com wrote:
>In a message dated 7/27/03 8:52:35 AM Pacific Daylight Time, DanW8KMX@aol.com
>writes:
>
> > I am putting up a HD Rohn BX to 56 ft and a separate Rohn 25 to 60 feet.
> > Although Rohn gives some guidelines on the cement base, much is not
>crystal
> > clear.
> > I had decided to overdesign the base and now have holes about 4 ft x 4 ft
> > and 6 feet deep. I am now ready to design the rebar system.
> >
> > I am interested in your opinion about the size of the base and the rebar
> > structure.
>
> Rohn discontinued the BX towers serveral years ago so they're not in the
>current catalogs. I've heard rumours that they're back in production but any
>Rohn product lately has been hard to come by as they're having their
>problems;
>i.e. there is NO new 45G available anywhere in the country.
>
> An older catalog says that for section #8 (the biggest one), they spec a
>3 foot deep and 4 foot deep pad. The 3-footer says that it's 6' 6" square
>with
>4.7 cu.yds. of concrete; the 4-footer is 5' 9" square with 4.9 yards. Number
>3 rebar (3/8" inch) is used 12 inches on center - all horizontals with the
>rebar on the top and the bottom. It's on Dwg. C760099R7 2-19-76.
>
> So that makes your 4x4x6 hole in need of some enlargement to meet the
>manufacturer's specs.
>
>Cheers,
>Steve K7LXC
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