I take a 12 inch length of the pipe, remove .3 inch along the length, insert 6
inches into each pipe and attach with about 16 1/8 inch dia aluminum pop
rivets. The resulting pipe is smooth and strong enough for one man to push up
63 feet, alone. I also install 3 larger rivets and angles for guying. I do this
at two levels with 1/8 inch delrin and it is very sturdy. I have had no
problems with ice retention or high winds.
73,
Ed Smith W4EDS
Spencer,VA
===============
--- On Wed, 11/11/09, Rick Karlquist <richard@karlquist.com> wrote:
> From: Rick Karlquist <richard@karlquist.com>
> Subject: Re: [TowerTalk] Guying 3 inch Irrigation Pipe
> To: "David Gilbert" <xdavid@cis-broadband.com>
> Cc: towertalk@contesting.com, "Pat Chiles" <chilesp@comcast.net>
> Date: Wednesday, November 11, 2009, 4:48 PM
> David Gilbert wrote:
> >
> > 3 inch ABS fits very nicely over 3 inch irrigation
> tubing, and Home
> > Depot sells black "plastic" toilet flanges that will
> fit over the 3 inch
> > ABS. The toilet flanges are super tough and
> already have four holes in
> > them for fastening to a floor. Glue the toilet
> flange to a few inches
> > of the 3 inch ABS and then slide the assembly over the
> irrigation
> > tubing. Drill three or four holes through both
> the ABS and the
> > irrigation tubing for self tapping screws to secure
> the sleeve in place.
> >
> > In my opinion, one set of guys about 2/3 to 3/4 of the
> way up each
> > vertical should be sufficient for everything short of
> a hurricane or
> > tornado.
> >
> > 73,
> > Dave AB7E
>
> I've done this before, however, there are a few
> issues. 3 inch ABS
> or PVC pipe may or may not fit "nicely" over 3 inch
> irrigation tubing.
> It depends on the tolerances of the pipe. I have seen
> pipe that would
> not slip over the irrigation tubing at all, even with a
> hammer. I have
> also seen pipe that is loose as a goose. This is why
> I slit the pipe
> and then clamp it with a hose clamp. The toilet
> flange has 4 holes,
> however they are somewhat offset from 90 degrees spacing,
> but it will
> sort of work. Also, the holes are made for
> countersunk screws and have
> sharp inside edges that are hard on the rope.
>
> BTW, on 4 inch irrigation tubing, I have seen exactly 1
> piece of 4 inch
> PVC or ABS pipe that would slip over the irrigation
> tubing. Every other
> schedule 40 pipe I've tried has been too tight. You
> need to use
> 4 inch class 200 well casing. That will easily slip
> over 4 inch
> irrigation tubing because it is designed to slip over 4
> inch pumps.
>
> Rick N6RK
>
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