In a message dated 99-02-05 01:09:48 EST, designserv@ipass.net writes:
> > I dunno, but on my Rohn 25, I wished I had the temps, particularly when I
> > was working on attaching the 60-70 feet section with the only set of guys
> > down at 31 feet. The long-period sway from just three unguyed sections
> was
> > scarey, whether or not it was structurally risky.
>
> I agree with you, Pete. I think three sections of unguyed Rohn 25 is
> pushing
> your luck and 4 is a no-no for me.
>
Rohn specs allow 1.5 sq.ft. of 25G @ 70 MPH (20 psf wind force) for a
height of free-standing 40 feet. The inference is that at little or no wind
the tower has MORE than adequate ability to hold a climber or two during
construction at that height.
Yes, there is some 'pucker factor' involved. It's like climbing a mast -
it's the ability to do these tasks that separate the 'professionals' from the
'amateurs'.
Not very many people are comfortable doing these kinds of tasks. Climbing
and working on a tower is 90% mental. If you're psyched out and uncomfortable
- that's fine, you know where your limit is.
This isn't too confuse professional capability with 'crazy', though.
I've heard of non-professionals doing some pretty crazy stuff that NO
professionnal would touch.
BTW, I "have safety belt - will travel" if anyone is looking for
someone to do professional tower work. I've worked on over 125 amateur
stations and many commercial sites.
Cheers, Steve K7LXC
Tower Tech
425-485-7913
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