[TowerTalk] Real numbers for Rohn BX-64

Chris Pedder chris at g3vbl.co.uk
Mon Apr 11 16:21:30 EDT 2005


At 18:54 11/04/2005, Jim Lux wrote:

>However, we'll approximate, using Rohn's moment calculation of 37,770 ft
>pounds.  At the top of the 64 ft tower, this is about 590 pounds.  So,
>assuming the wind comes from the direction of the guy, the guy is going to
>have to resist the 590 pounds.. assuming no deflection (so the angles
>remain the same) requiring a tension of 590/sin(30) = 1180 pounds.  That's
>an increased downforce of about 1400 pounds, for a total of 2440
>pounds.  Yes, it won't be quite that much, because the downwind guys will
>relax a bit, etc.

Excuse me, the tower is rated for 120lb (sic) headload and you want to 
apply 590 lb, albeit opposing the 120lb on the antenna? Do you think this 
is a sensible strategy?

Chris





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