There is little difference in stiffness between a hollow shaft and a solid
shaft - perhaps 10%, since the stresses are carried on the outer fibers. A
better solution would be to place longitudinal fins along the length of the
shaft, tapered at the ends. This effectively increases the diameter of the
shaft, but also increases the wind loading. THe only other thing that can
be done to increase the stiffness of the shaft is to make it a larger
diameter.
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com]On Behalf Of Barkey, Patrick M.
Sent: Wednesday, January 26, 2005 3:16 PM
To: towertalk@contesting.com
Subject: [TowerTalk] How to stiffen a mast
I've been using 24 foot, half inch wall, 2.5 inch OD aluminum masts
on all of my towers for quite a few years, with no failures or real
problems. During the recent ice storm, however, a couple of them
flexed a little more than I'd like to see (they've since sprung back).
Now that I have the opportunity to think this over, I am wondering
if it would be of any value to try to add a little more stiffness to
the existing mast by driving something into the hollow center.
I've got a 1.5 inch ID hole to work with - perhaps some pipe or
solid rod could be driven into it?
Wondering if anyone has ever tried anything like this?
- Pat
N9RV
.
_______________________________________________
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
_______________________________________________
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
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