I'm not so sure I'd worry about the rust, but steam pipe is probably cast
and it's probably much more ductile (bends easily for a given size) that the
alloys we'd want to use for masting.
Also, if it has had steam run through it, I'd imagine it is pretty rusty
inside.
Tom W7WHY
>I would not use it for mast material. You want something like high carbon
>steel or 6061-T6 aluminum. Steel is about twice as strong as aluminum in
>the same OD size and wall thickness, so it is the best choice for longer
>masts.
Steel, like Aluminum varies widely in strength depending on the alloy.
Also strength and elasticity are two different things. Water pipe and black
iron bend rather easily while the galvanized pipe used in fencing is much
stronger, but will give more in the wind. IE it'll move farther without
taking a set and it is harder than water pipe. I'd not hesitate to use a
piece of galvanized water pipe from the rotator up *through* the tower to an
antenna just above the top of the tower. I'd not use it to extend much
above the top of the tower so when you talk about stacking I'd not go that
way.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
73, Keith NM5G
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of AA6DX - Mark
Sent: Sunday, August 13, 2006 9:02 PM
To: TowerTalk
Subject: [TowerTalk] Steam Pipe for Masting
Howdy TTers .. I have available some 2Ø' sections of black steam pipe, 2.5"
(OD? ID?) --- Heavier than regular pipe .. apparently bent at the ends, so
'bout 17' good .. Anybody know about using such piping for masting? I
guess would be good for holding up other pipes for dipole ends, but ...
wondering if would work for yagi stacks ??? Going to go have a peek
tomorrow. $25 each seems reasonable.. 73 Mark Nelson - AA6DX
mailto: AA6DX@ARRL.NET
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