My personal rule for Rohn Gin Poles is:
NEVER EVER use a Gin Pole to raise antennas.
Don't even think about it.... NEVER !
The reason is simple: The gin pole is designed for
LIGHT VERTICAL LIFTS. ANY significant load
would exceed it's load rating. ANY significant SIDE
load can / will BEND the thin wall aluminum tube.
I use the TRAM method for raising / lowering my Yagi's.
I attach the tram rope and pullup pulley to my MAST.
Think about it: which is stronger, a THICK WALL
STEEL MAST secured in the center of your tower, or a
THIN WALL ALUMINUM Gin Pole attached to a tower leg?
I second Steve's (K7LXC) recommendation for separate
crane lifts of the tower and mast loaded with the antennas.
On Wed, 21 Aug 2002 "Dave Dunbar, N0RQ" <email@example.com> writes:
> I have a Trylon T600 - 64', hopefully going up in a few weeks. A few
> questions, if I may...
> It will be assembled on the ground and raised by a crane. How does
> one attach a Rohn 25 ginpole to the top for the purpose of hauling
> the HF beam (Force 12 XR-5) to the top? Is there some better way to
> get it up there?
> Also, how much stuff can I attach to the tower before the crane
> arrives? (The theory being it is easier to do it on the ground than
> in the air.) I plan to have the rotor and coax switch mounted,
> along with the associated cables (tied up inside the tower), but can
> I also have mounted:
> * the mast (9' of which is above the thrust bearing)?
> * the 6m beam (M2 12' boom) at the top of the mast?
> * the side brackets for the side-mounted 2m vertical?
> * the 3' PVC stubs that will hold the pulleys for the dipoles?
> How much risk is there in installing those before it is lifted up?
> Any suggestions for the crane operator -- how far up to attach the
> crane, what to use or not use as a strap around the legs, do or
> don'ts for lifting, etc.
> Many thanks.
> Dave, N0RQ
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