Page 25G-1, and page 25G-2 of the Rohn consumer catalog.
Their design charts, their design drawings.
Blake:
I beg to differ with you.
Using TIA/EIA 222-F wind loading criteria and 70 mph wind velocity (min.
recommended) a 40 foot section of Rohn, 25g un-guyed and cantilevered will
develop a moment at the base of 7200 ft-lbs at the base. This is without
an
antenna load, just the tower itself. The published allowable moment for
25g
,by Rohn, with a 1/3 increase for wind loading duration is 6,720 ft-lbs.
At
40 feet it is clearly overstressed. How do you say that this is ok and
that
Rohn fully supports this?
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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