_dinsdale_

Fixing a Pad Eye to the deck with no access below

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 As the title says. I am building a barber hauler system on my 33ft sloop so there will be a considerable (sideways) load on the fitting BUT the ideal place for pad eye has no access to the underneath for any kind of backing-plate or fender washer. The boat has a double lining ie: deck and interior lining with no core but there is space between the two layers just no access to it without serious destructive work. Any suggestions welcome.

D

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A hole saw to the liner to create access and make a pretty cover plate out of teak or something.

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Mine has wooden plugs (like sheet metal plugs, but made from mahogany, I think) with nice tapered caps, that fit into holes bored for that purpose.  You can pop 'em out with a screwdriver for access.

Weirdly, all the images for "wood plugs" that I can google up are either conventional straight plugs or fancy things that apparently are for inserting into holes in your body. :unsure:

Wouldn't be too hard to make with a lathe.  

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5 hours ago, SloopJonB said:

A hole saw to the liner to create access and make a pretty cover plate out of teak or something.

This 

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How thick is the deck there? The West System manual gives data on pull strength of machine screws embedded in epoxy plugs, comparable with through-bolted screws. Need deck thickness greater than screw depth.

Cut a largeish hole (size of pad-eye?), insert a metal backing plate cut in two so that each piece fits through the hole and extends beyond it, pre-drilled to mate to the pad-eye screws, epoxy the plates in place (hold with temporary screws, etc). Fill gap with thickened epoxy, mount pad-eye. Practise first.

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If you go with rivnut rather than Fleetwood's method (best), is the deck cored?

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Use sheet metal screws like Hunter does. If it's heavily loaded use the #12. For extreme loads, use #14. :)

If the deck is cored, you can bond in threaded G10 inserts from the top, almost as good as a backing plate if done right (better, in shear). 

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THANKS to all for the suggestions. Will go to the boat for another inspection with these thoughts in mind. At this point leaning towards Fleetwood's suggestion of slipping a backing plate/s in from above. (PS. Deck isn't cored for those who asked)

D

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16 minutes ago, _dinsdale_ said:

THANKS to all for the suggestions. Will go to the boat for another inspection with these thoughts in mind. At this point leaning towards Fleetwood's suggestion of slipping a backing plate/s in from above. (PS. Deck isn't cored for those who asked)

D

You can put in a backing plate quite a bit larger than the hole if you make the hole an oval.

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On 11/9/2018 at 8:22 AM, Ishmael said:

You can put in a backing plate quite a bit larger than the hole if you make the hole an oval.

Thanks for the tip!

 

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