Don't use the provided coupling, they have so little mechanical strength
the supplier won't even rate them - in every plumbing and mechanical
codebook it is mandatory to support the pipe or conduit every 10 feet,
so it makes it legal to use a 9 foot 11 inch pipe or use the whole 21
foot length as many of us have for many years combined with common sense
mounting brackets and it works. You will have to manufacture some
insertable fitting to handle the stress of multiple lengths, I would use
no less than a 2 foot length of some mechanical tubing and four 3/8
bolts on each side to insure a lasting connection with the gyrations of
wind loading.
Don wrote:
>
> >You should be able to get schedule 80 pipe for 20 foot lengths,
> >certainly 10' but I've bought it in a 20' piece before. It's wicked
> >heavy, probably 5 times thicker wall then fence rail.
> >
> >Good Luck
> >
> >
>
> Just Called around and found a great Price Explaining the Public Service
> Ham Radio Provides .
>
> What is the highest anyone has put up Sch 80 Extra Heavy wall ? it comes
> in 21 Ft I was thing about 3 of
>
> Them with two couplers and about 4 Ft down in Concrete
>
> Thanks Don KA9QJG
>
>
> Yahoo! Groups Links
>
>
>
>
--
73...Clark Beckman N8PZD
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