[TowerTalk] Planning New Tower

K4SAV RadioIR at charter.net
Sun Mar 16 19:44:24 EDT 2008


I think you are a bit overloaded with that tower.  The tower is rated 
for 16 sq ft at 70 mph and the MonstIR has a load of 23.9 sq ft.   I'm 
not sure how the rating goes up as you lower the tower, but I would 
expect a significant increase.  I have tried to get that information, 
but US Tower doesn't rate them like that and won't give out any info. 

Another item of concern, and this is the reason I chickened out putting 
a MonstIR on a crankup which was rated to handle the windload.  Because 
of the size, those antennas can put a lot of torque on a tower.  If you 
look at the HDX series of crankups the only thing resisting that torque 
is 3 little ears.  If those bend, the tower is jammed. I was unable to 
get any torque rating information out of US Tower.

Jerry, K4SAV

Mark Robinson wrote:

>I am starting the planning phase of my tower. I am thinking of installing a Texas Towers HDX-589MDPL crank up tower. I would like to put a MonstIR beam on it. I am concerned with the windloading - fully extended I don't think that I have enough safety margin - I believe that the Steppir has a windload of around 30sq feet.
>
>Can I guy this tower at the top to get a better wind loading or should I leave it at say 50 of 60 feet most of the time? Does anyone know how the max windloading figure increases as the tower is nested?
>
>What would be the recommended rotor for a beam of this mass - I want the installation to hold up in our rough summer storms. I am located in North Carolina
>
>
>thanks  Mark N1UK G3ZZM
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk at contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>  
>



More information about the TowerTalk mailing list