[TowerTalk] TowerTalk Digest, Vol 111, Issue 30

[K7LXC at aol.com]

>  I currently have a Rohn HDBX 48' tower. While the tower  has a pretty 
good wind load rating, 18 sq ft at 3' above the tower, Rohn  limits the 
boom length to 10'.

>  I would like to put up a 2  element 40m beam as well as a 3 or 4 element 
10/15/20 meter beam with a  VHF/UHF vertical on top. Wind load wise this 
may not exceed the load rating  of the HDBX, but I'm pretty sure it 
wouldn't be recommended as boom lengths  are a lot more than 10'.

>  Is there a tower available that has  the same base measurements as a 
HDBX 
that could handle such a configuration?  With all the concrete in the 
ground, I'd like to use it.
 
Howdy --
 
    Are you W0RK? There wasn't any callsign in your  email. If so you're 
listed as being in Stearns County, MN - an 80 MPH  windspeed zone. You'd be 
really pushing your luck with the proposed antenna  array. The BX et al. are 
towers for TV antennas. They're light- to medium-duty  depending on the 
configuration. The sections are held together by aluminum  rivets so they won't 
take much stress - that's why there's the 10' boom length  warning. Consider 
yourself warned. 
 
    Sell it and get a real tower. Or keep your  homeowner's insurance paid 
up for when the catastrophe happens. 
 
Cheers,
Steve     K7LXC
TOWER TECH -
Professional tower services for amateurs
Cell: 206-890-4188