[TowerTalk] wind load vs Rohn specs

[Pete Brunet/Austin/IBM]

>Pete, You are in the wrong code. There is no .67  To get the ROHN assumed
EPA value you multiply their are by 1.2 for rounds and 2.0 for flats.


According to the Force 12 brochure they start by knowing their antenna's
projected area.  The generate their windload number by multiplying their
projected area by .67 and they publish that number in their brochure.  In
order to know what projected area they started with I would have to
multiply their windload by 1.5.  Make sense?

If I know their projected area, can I assume that since it is a round
member antenna I can use the round member spec?

The antenna is 30' of Rohn 25.  My zone is rated 70 mph.  The shortest
tower I see in their manual is 40' so I will use those numbers.

Concerning the coax, let's forget about it and say that our configuration
will be close to the Rohn configuration.  Besides the antenna, what other
top of tower items will a PE want to know about, e.g. mast and rotator?

Thanks, Pete ws4g


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