Be careful in considering aluminum as a mast material. Whereas some
aluminum alloys offer an attractive yield strength, many do not exhibit an
ultimate strength with much margin over yield (a.k.a. toughness) as compared
to carbon steel. The results can be catastrophic - the mast breaks
relatively soon after reaching the point of bending when subjected to
excessive strain. This is not necessarily a problem if the proper factors
of safety are maintained, but is something to be aware of.
73 es GL
Matt
KM5VI
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of K8RI on TT
Sent: Wednesday, July 06, 2011 9:14 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Need a mast for my tower
On 7/6/2011 6:10 PM, STEVE LANE wrote:
> Looking for a 20' long 2" diameter heavy wall mast. Going to have a Force
> 12 C19XR and a 10 meter ground plane on it. I am near the San Francisco
Bay
> area and can pick it up. Thanks
>
Check around your area for metal supply shops. I have two places, one
within 5 miles and the other about 20. Both will deliver which
unfortunately is no where near your location. The one place has
Aluminum, Steel, and Copper in sheets, rods, and tube. They even carry
DOM steel.
I'm installing a C19XR with the WARC 7 above it on 2", 1/4" wall,
6061-T6 Aluminum tube. The WARC-7 is fairly light and only about 4 sq
ft of wind area.
73 and good luck,
Roger (K8RI)
> Steve
> K9SL
> _______________________________________________
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