[TowerTalk] Tilt over tower

[Kirk Kleinschmidt]

On my 20-foot "test" tower, which tilts over at the base and brackets onto the edge of my carport beam, i wrapped a couple turns of logging chain around/through the Rohn 25 structure to spread out the load where the tilt cable attaches. I guess on Rohn 25, especially with such a short tower, that is probably overkill...  But the Rohn lattice towers definitely need something like the wrap-around chain (IMHO) to spread out the load.
--Kirk, NT0Z

My book, "Stealth Amateur Radio," is now available from www.stealthamateur.com and on the Amazon Kindle (soon) 

    On Wednesday, August 18, 2021, 09:18:15 PM CDT, Kelly Taylor <ve4xt at mymts.net> wrote:  
 
 It probably should NOT be attached to the tower’s lattice structure, which is thin stamped steel held in place with aluminum rivets (which is why assembled Rohn HBX sections shouldn’t be hot-dipped…)

Probably something similar to a guy station bracket, which connects to all three legs, is in order.

73, kelly, ve4xt,


> On Aug 18, 2021, at 8:54 PM, Kirk Kleinschmidt via TowerTalk <towertalk at contesting.com> wrote:
> 
> Yes! And moreover, HOW should the cable attach to the HBX lattice tower structure?
> I'm looking to tilt my 32- or 40-foot HBX (32-foot if it's in the HDBX configuration) where it will be bracketed to the peak of my roof (where the top pulley lives), which is about 15 feet up (a bit higher than the OP).
> Mine will be sporting a lightweight hex beam or a stack of small VHF/UHF Yagis.
> I have always wanted to find a reasonably definitive tilt-over calculator that defines the lifting strength required (varies with tilt angle), optimal height above ground for attaching the tower connection, load stress on the top pulley, etc.
> If there are any trigonometry and/or mechanical engineers lurking, please spill the beans!
> 73,
> --Kirk, NT0Z
> 
> My book, "Stealth Amateur Radio," is now available from www.stealthamateur.com and on the Amazon Kindle (soon) 
> 
>    On Wednesday, August 18, 2021, 07:54:55 AM CDT, John Simmons <jasimmons at pinewooddata.com> wrote:  
> 
> Subject: Rohn HDBX48 with Tailtwister rotor and 90 lb yagi with Rohn 
> tilt over base.
> 
> Question: With the lifting pulley at 10 feet high, how high up the tower 
> should the lifting cable be attached? Why?
> 
> -de John NI0K
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