I use 21' of 1020DOM 1/4" wall steel tube for 2 towers. However on another
I have a 15' length of galvanized fence pipe. I believe it is called
Schedule 40+ and it has supported a 3 el 20M monobander, a 38' boom 8 el 6M
yagi at the top and a 28' boom 432 yagi in the middle. It is not cast iron
and is both strong and light and cheap when I bought it 15 years ago. Never
a problem here on this exposed hilltop rock pile.
At a former QTH with less wind exposure I had a 20/15/10 stack of W2PV 4el
monobanders on 20' of 2 3/8 OD galvanized cast pipe. Except for eating
rotators (Daiwa and Create even using 2 thrust bearings) it survived just
fine thru many northeasters, CAT 2 & 3 hurricanes and ice storms while on
100' of 25G.
Im sure that there are many parts of the country that cast pipe would fail
but dont discount it altogether.
----- Original Message -----
To: <email@example.com>; <Eroddy4366@aol.com>
Sent: Friday, June 01, 2007 9:46 AM
Subject: Re: [TowerTalk] masts.
> In a message dated 5/31/2007 7:56:02 P.M. Pacific Daylight Time,
> firstname.lastname@example.org writes:
>> i need to install a new mast to support a t12 log antenna.i want to use
> of sch40 galvy pipe 2 inch in dia.anyone think differently.i had thought
> about using sch 10 sprinkler pipe.thankyou
> Ouch - a recipe for disaster. Pipe - the definition of which has been
> recently discussed - is not rated for strength and is heavy but not
> enough. A typical water pipe might have 35,000 psi yield strength. You're
> probably going to need more than that; e.g. 50-60,000 or more.
> You didn't mention your local windspeed rating. If you don't know, you
> can find it on _www.championradio.com_ (http://www.championradio.com)
> "Tech Notes".
> I sell the MARC Program - the Mast, Antenna and Rotator Calculator -
> ten bucks on the same website. It'll give you the info you need. And you
> need tubing - not pipe.
> Steve K7LXC
> TOWER TECH and
> Champion Radio Products
> Cell: 206-890-4188
> ************************************** See what's free at
> TowerTalk mailing list
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