|To:||"Macie, Gordon" <GMacie@innotrac.com>,"'email@example.com'" <firstname.lastname@example.org>|
|Subject:||Re: [TowerTalk] 40 Meter Vertical Construction|
|From:||Joe Reisert <W1JR@arrl.net>|
|Date:||Thu, 13 Nov 2003 11:08:55 -0500|
One of the "rules-of-thumb" used with tubing is to overlap 2-3 times the diameter of the element. Therefore, 5" is great on 1.625" tubing while only about 2-1/2" is needed on the .875" diameter tubing. Of course, more is OK but from an economy and weight perspective, less is better!
At 05:17 PM 11/7/2003, Macie, Gordon wrote:
I am building a 40 meter 4-square. I have decided to build it with aluminum from Texas Towers. The bottom section will be 1.625 and reduce 1/8 per section above that with the top peice being .875. How much do I need to overlap or telescope into each section for mechanical strength ??.. I am thinking 6 to 12 inches.
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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