Used Rohn 45G $75-$130ea
I dont have any advice I can offer you that would be successful under the
conditions you wrote about in your post.
GL es 73
On Sat, Sep 30, 2017 at 8:04 PM, bear <bear@bearlabs.com> wrote:
> Hello Tower dudes?
>
> Just now joined because I was directed this way from a thread I started on
> QRZ about using the falling derrick method to raise towers. Not much useful
> info came back.
>
> Was looking for actual numbers/equations/etc. to make certain that IF I go
> this way that I am 99.9% safe in terms of knowing the stresses and forcesat
> play, and well over the minimums.
>
> (nice videos on Yoohootube, etc, but that's not engineering information)
>
> We can burn that bridge later...
>
> ...anyhow I am looking at acquiring ~100ft of Rohn 45, old, but in good
> shape... on the ground now.
> Need to make a decision, aka Go-NoGo.
>
> (btw, what do you folks think a "very good" price for that would be? I
> have no real clue what things like
> this go for these days...)
>
> My thing is that I am not likely to want to climb that much tower.
> Actually, I won't. Hiring local companies
> is likely a budget breaker (except in emergency/extreme situations), and I
> don't know of any local hams who climb.
> And relying on just one person, not a great idea.
>
> The deal comes with a Rohn break-over section, but that won't get me the
> height I would like as they are limited in the number of sections
> above and below that point.
> But I can make 90-100ft with the rest of the sections.
>
> All good.
>
> So, baby steps...
>
> Can anyone point to a good site that covers the *method* for pulling up
> guys, BEFORE you get to final tensioning?? In other words, close enough so
> that you can use a turnbuckle... frankly, I don't know.
>
> I've put up 1/2 arse crank ups, but they were away from all structures, in
> the woods, and if they fell, so what...
> besides the crunched beam at the top that is... they never fell. But that
> wasn't a 90-100ft piece of Rohn 45.
>
> I throw myself at the mercy of the group.
>
> _-_-bear aka WB2GCR
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