[TowerTalk] Roof Mounted Self Supporting Tower...

[Dino Darling]

Hello Comrades!

I doing some leg work for the possibility of placing a 40' self supporting 
tower on the flat roof of a gym for a communications station/disaster 
shelter.  The tower will most likely hold the M2 Log Periodic and a 
substantial vertical for VHF/UHF.  Also, a 80 meter dipole.  I picked 40' 
because the roof is 20'+ and I want to be at least 60' off the ground.

I am doing my homework to look at different towers with their different 
wind load ratings, etc.  My initial thinking is to build a "platform" that 
will tie into the roof members, spreading out the load, and giving me 
multiple anchor points....say 10' x 10' covering 5 beams.  An engineer will 
be consulted.

If you have mounted a tower on a roof, I'd like to hear what you have to 
say and any tower manufacturer recommendations you may have!  I was 
thinking about aluminum in order to keep the weight down to a 
minimum.  Another option was a guyed Rohn 25G.

When I was Chief Operator for Naval Station Long Beach MARS Station in 
1990, we had a crank-up tower mounted over a single beam and guyed.  I 
didn't install it, but I had to work on it!

I would rather NOT have to run guy wires in order to keep the "looks" clean.

As always, THANK YOU!!!

Dino...k6rix at earthlink.net