In a message dated 2/16/2008 9:02:36 A.M. Pacific Standard Time,
> I'll be using a 20 foot mast. Starting out with it already
inside the tower avoids some serious struggles up top.
> However it also means starting out with 20 feet of tower
with the mast inside. I'm not too clear on a safe way to
hoist 2 55G sections and mast vertical and onto the top
end of the base section.
> In the past, it was no problem for me to hoist 2 25G
sections (and no mast) onto a pier pin base alone.
My first tower here was 55G. 2 of us were able to
walk up the first 20 feet (again, no mast) and set the base
plater over a pier pin.
> Somehow, 2 sections of 55G with 150 to 200 pounds of mast
inside has me worried. Getting it vertical using another 2 sections
looks doable - but manhandling it up and onto the base seems
a bit tricky (every wonder why sections done want to fit at the
least opportune times?!?)
> Aside from the obvious (crane) I'm wondering how you
may have approached this task.
> In reality, a crane may be a lot safer leaving me
to rethink the installation sequence.
I've got to see a picture of the ginpole you'll be using! One using 25G
sections wouldn't be overkill in this instance. I think someone said the load
will be close to 300# - YIKES!
One of the hard lessons I've learned over the years - this would be the L
XC Secondary Directive - is to break everything down into bite-sized
portions. Anytime you try to do 2 or more things at once you're asking for
e.g. installing an antenna with feedline attached, hauling a top section with
rotator and mast, etc. Install the antenna and THEN attach the feedline.
Install the top section and THEN add the rotator and cables. Somewhere along
line if you don't it's going to bite you in the butt.
My suggestion is to stack 2 sections and then put the mast inside the
tower. IF your ginpole will take the load. The standard Rohn isn't rated for a
Then build the tower. When it's done, pull the mast up thru the tower
and thru the thrust bearing. This is still more than the Rohn ginpole is rated
for so again I'm curious to know more about your ginpole. Once the mast is
poking out of the top of the tower, secure it with the TB bolts and remove the
haul rope. Then use a comealong to inch it up. It's kind of tedious but works
Of course a crane trumps everything and it'd be my choice if feasible.
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