Thanks to all who replied. I just solved the problem with a Rohn 2 inch
heavy wall galvanized inside and out M200H tube from Hill Radio.
73 ES DX,
Gary -- AB9M
-----Original Message-----
From: GARY HUBER
Sent: Monday, August 19, 2013 8:58 PM
To: TT TowerTalk
Subject: [TowerTalk] 2 inch Mast versus schedule 80 pipe?
Environment: 50 foot AGL Rohn 45G flat top bracketed @ 23 feet, T2X
TailTwister on Rohn rotor shelf, Rohn 2 inch bearing, Hy-Gain TH-7 1 – 2
feet above bearing, with boom support (3 feet above boom).
I’ve had a ten foot section of 2 inch schedule 40 galvanized pipe in a
similar (tapered top – exception) environment for close to thirty years. I’m
now getting ready to replace the existing tower with new, cables, rotor,
antenna, etc. Maximum intended life of the new installation: No more than
15 years
Thus far I have not found a source with specifications of 2 inch mast tube
and have been looking at galvanized pipe again, either schedule 40 or
schedule 80. I took a S.W.A.G. the last time and was fresh from working at
a steam power plant where we worked with pipes daily. That knowledge is
gone; anyone have any suggestions or recommendations for a rotor mast
carrying 75 pounds, 12 sq feet, and 240 pound wind load at 80 MPH? tube or
pipe, sched 40 or sched 80, where to buy?
Best regards,
CSM(r) Gary L Huber – AB9M
9679 Heron Bay Road
Bloomington, IL 61705
WWW.CSM-GH.COM
glhuber@msn.com
309-662-0604
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