In a message dated 98-04-10 20:39:38 EDT, ke4rna@Traveller.COM writes:
> What is the recommended wall thickness for 2" chrome-moly tubing used
> for a mast? I will have 5' inside the tower with a thrust bearing at
> the top. Two feet above that will be an antenna with 18 sq ft wind
> loading. Ten feet above above the bearing will be an antenna with 1.8
> sg ft wind loading. Thanks
Morgan County, AL, is only a 70 MPH windspeed zone so you're off the
hook for big winds.
What you need is the MARC Program - the Mast, Antenna and Rotator
Calculator. Plug in the wind speed and the above information and it'll TELL
YOU exactly what you need - mast material, wall thickness and yield strength
required. It's only $9.95 + s/h from TOWER TECH, Box 572, Woodinville, WA,
98072.
Cheers, Steve K7LXC
TOWER TECH -- professional tower supplies and services for amateurs
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