Someone please tell me if I am about to make a mistake. I plan to use a 20 ft.
long schedule 80 6061-T6 aluminum tube ( 1.9" OD .200 wall thickness) for a
mast on which I plan to put a Steppir 4el (9.7sqft) at 3 feet above the thrust
bearing. The second antenna is a hygain rotatable dipole (2.8 sqft.) at 12 feet
above the Steppir. A windows program I have says this will produce a total of
21365 in-lbs at 70 mph. Data says that the 6061-T6 has a shear strength of
29700 PSI. Am I drawing the wrong conclusion that this will work OK. Need some
good old tower talk expert advice ASAP. Thanks Van W4GIW
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|