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Re: Galvanizing a Spar Hinge

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On Fri, Feb 12, 2010 at 3:10 PM, bill(--nospam--at)polhemus.cc <bill(--nospam--at)polhemus.cc> wrote:
> Let me describe this mechanism.
>
>
>
> Imagine a spar made of a length of pipe, with round plates welded on each
> end to close the pipe - now it looks like a spool. Now, weld a gusset or ear
> on each end of this assembly, so that they project along the long axis. Put
> a 1.5 inch hole through each of these gussets.
>
>
>
> Now imagine you have embed plates or padeyes anchored into a concrete block,
> which have TWO parallel gussets welded to the embed, with a gap between the
> two pltes just a smidge wider than the thickness of the gusset plate on the
> spar. These plates also have 1.5" holes, so that you can fit the spar gusset
> between the padeye double-gussets, align the holes, and slip a pin+cotter
> through the holes.
>
>
>
> Voila, you have a hinge.
>
>
>
> Now, is it okay if everything is galvanized? Or must you prevent galvanizing
> deposits on the "faying surfaces" of these plates (both sides of the spar
> gusset, and the inside of each padeye gussets)?
>
>
>
> Comments, please.



-- 
Stephen Michael DeVoe
devoesm(--nospam--at)gmail.com
(225) 235-4104

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