[TowerTalk] Calculating load when raising tower

[Alfred Frugoli]

Hello Everyone,

Is there a simple equation for figuring out the forces that would be
experienced in tilting up a tower?  I'm buliding a raising fixture, and want
to make sure that pulleys and the winch can handle the associated loads.
The tower is a 30 foot tower, and will be raised by a cable attached near
the top of the tower, that will run through a pulley 15 feet above ground
about 30 feet away from the tower (on an appropriately reinforced point on
the house), then back to a pulley near the top of the tower then to a winch
mounted at an appropriate height at the tower base.  The tower is a 30 foot
aluminum tower with a rotor, 5 foot aluminum mast, and a small tribander
just above the top of the tower.

A 2nd question is would it be better to have the cable routed in a different
way, or attach at a lower point on the tower (level with the raising point
at ~15 feet)?

73 de Al, KE1FO

K3 #3055
K3 #4094
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