[TowerTalk] Basic tower installation question

[N4NW]

The pier-point base has the advantage that you do not need to be 
concerned about water draining from the legs embedded in concrete.


I have a 110' Rohn with a pier-point base that has been up twenty 
years. Routine inspections shows no corrosion as the weep holes in 
the flat base plate are kept clear,

73's
Tom, N4NW

At 12:29 PM 11/10/2009, Tommy wrote:
>I live in an 80-mph wind zone and am going to put up a 70 foot Rohn 45G
>tower, using 3/16 EHS for the lower guys and HPTG6700 for the top guys. I
>will have a 22-foot DOM 1026 mast with a 6.8 sq. ft. wind load at the top of
>the mast; 10 foot below that yagi and 2 foot above the top of the tower, I
>will have a 12.8 sq. ft. wind load yagi. The mast will extend 8-foot down
>into the tower, through a thrust bearing and then resting on a Msquare
>2800PX rotor.
>
>
>
>My basic question is about the base. Should the base for this system be a
>pier-pin type base or just a Rohn concrete base section? At this point I
>could do either, but would like to install the best base for this system.
>The other question would be would it really make any significant difference
>which type base to use for this application, considering the load I will
>have at the top of the tower?
>
>
>
>Thanks for any information/suggestions.
>
>
>
>Tom - W4BQF
>
>
>
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