[TowerTalk] GRC vs. IMC

[Michael Fox - N6MEF]

Thanks, but my question was not about tubing or masts.  My question was
about GRC vs. IMC for mounting pipes.  

 

Does anyone have any information why one vs. the other should be used?

 

Thanks,

Michael

N6MEF

 

 

From: K7LXC at aol.com [mailto:K7LXC at aol.com] 
Sent: Monday, February 20, 2017 7:54 AM
To: towertalk at contesting.com; n6mef at mefox.org
Subject: Re: [TowerTalk] GRC vs. IMC 

 

>  I'm curious what people use for mounting pipes (not masts) on larger
towers and why.  For example, when mounting a dish antenna, a vertical pipe
is typically installed.

 

    The reason you can use pipe (as opposed to tubing) on commercial towers
is that there is no bending moment on the antennas unlike amateur masts that
stick straight up and many times has multiple antennas mounted on it. 

 

    LXC Recommendation: When installing multiple antennas on a mast,
alternate on which side they're mounted. In other words, if one antenna is
mounted on the left side of the mast - mount the next on the right side of
the mast. If you look at the force vectors, you'll see that they can largely
cancel each other out. 

 

Cheers,

Steve    K7LXC

TOWER TECH - 

Professional tower services for amateurs

Cell: 206-890-4188