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[TowerTalk] Mast wall thickness

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Subject: [TowerTalk] Mast wall thickness
From: (Scott Bullock)
Date: Sat, 11 Apr 1998 05:34:32 -0400
According to my mast calculator which only does 90 or 100 mph wind
calculations, at 90 mph you need a 68,939.68 psi yield strength mast. I'm
not sure what wind speed your location is. This would have an effect on
what the total strength needed is. 
Go for at least 1/4" wall tubing and you shud be all set. If you think you
want to upgrade later, then get chrome moly and that will take much more.


At 09:32 PM 4/10/98 EDT, you wrote:
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

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