Tim:
Go to the Heights website: www.heightstower.com
See their first chart "A". Your tower is most similar to the 72 foot, 31 sqft,
@ 80 mph model. It depends a bit on the diameter of the tubes of the sections.
It appears that the owner of the tower may have sustituted a 22" section for an
18 at the top.
Anyway, be careful about putting that WARC tribander up above the X-7. You need
at least seven feet of spacing and 7 x 5 sq feet is like adding 35 square feet
to the windload of the X-7. You will be overloading the tower.
If you choose to do this, I strongly advise guying the tower. I know this from
personal experience when I lost a "Christmas tree stack" on top of a 72 foot
Universal tower with 12 feet of mast out the top due to a 95 mph straight line
wind.
73, Dennis W0JX/8
Milan, OH
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