[TowerTalk] Rohn Windload??

[Bill Hider, N3RR]

Get yourself a licensed PE to analyze the situation and determine what the
safe loading can be.  Don't guess or allow yourself to be convinced by
anyone on this reflector.  Remember, it's your liability going forward.

Bill, N3RR

Richard Thorne wrote:

> OK, I'm picking up 240' of 55g tomorrow.  Me and K5XM and W5ZO plan on
> putting up two towers.  Lets assume for a moment they will both be 120'
> in height.
>
> According to the rohn catalog a 120' 55g tower in 90mph winds can handle
> 23.1 square feet of antenna (15.1 + 8 for side mounts that won't be on
> the tower).  This 23.1 is on top of the tower.
>
> Now if one starts stacking yagis at various heights, does the 23.1
> square feet still hold or does it change?  Does that number go up or
> down since the square footage is spread all over the tower.  For example
> if the tower was only 100' the square footage increases to 24 square
> feet.  Not a big jump but I have to assume the tower can handle more
> antenna at the 40' level than at the 120' level.
>
> So how does one safely determine how many antenna's (square footage
> wise) can be stacked on the tower?
>
> --
> 73,
> Richard Thorne - N5ZC (ex KA2DSY, N2BHP, WB5M)
> Amarillo, TX
> Home Page: http://users.arn.net/~rthorne
>
> --
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