[TowerTalk] Rohn 50 Foot Push Up Mast

[ersmar at comcast.net]

Dave:

     I can't anwer your questions regarding wind loading, etc.  But I can offer a suggestion.  I had one of these PU masts to my ATV Yagi and 2M vertical a few years ago and didn't like the thin cotter pins that came with the mast.   If you haven't done so already, you should replace the cotter pins that hold up each section with stainless carriage bolts and hardware.  In fact you ought to install a second bolt at each joint.   In that way you can apply a bit more vertical load that will result from guying with two sets of guys.  


73 de
Gene Smar  AD3F



 -------------- Original message ----------------------
From: Dave Tipton <dave at lodave.org>
> Ok, so I have a 50 foot mast pushed up to about 35 feet and guyed near the top.
>    
>   I'm thinking about adding a second set of guys (And replacing the other set) 
> with some small phillystran to set up as a second "High" point in the yard.
>    
>   My question is this...  What is the actual wind load rating that this mast can 
> handle in that configuration?
>    
>   I'm planning to add a couple small antennas to it...
>    
>   1. Center support for a rather cumbersome folded dipole.
>   2. 6M Ho Loop
>   3. 2M Ho Loop
>   4. 8Foot 2M/70cm Vertical
>   5. If it can handle it, a 3 Element Vertical 2M and a 5 Element vertical 70cm 
> antenna with a TV Rotor and a 4 foot mast.
>    
>   The Ho Loops will be mounted, just below the top guy points.
>    
>   I also have the option, in this case, of guying at 20, 30, 40 and 50 Feet, but 
> would like to keep it to 2 sets of guys, and 3 absolute max.
>    
>   So far, at 35 feet, it's withstood an 80MPH wind with one set of guys.
>    
>   Ok gang... Talk to me.
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