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Old 09-05-2013
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Backing plates, what do you use?

I am looking at converting my boat to have the lines run to the cockpit. Most of the hardware doesn't come with backing plates but I know you should use them to distribute the load. I also don't see much in the pre-fabed variety either. What do you use?
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Old 09-05-2013
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Re: Backing plates, what do you use?

Depends on the loads you're expecting, and what you are fitting it through. Sometimes I just use a big washer, sometimes a plate made from 3/16th stainless, sometimes a bit of half inch marine ply.
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Old 09-05-2013
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Re: Backing plates, what do you use?

Do you have any good sources for the 3/16th stainless?
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Old 09-05-2013
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Re: Backing plates, what do you use?

I'm not a fan of plywood backing plates inside the cabin.

I made backing plates out of recycled deck parts from boats destroyed in h'cane Sandy:
2013, May 2nd. Re-core work party. | Odalisque
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Re: Backing plates, what do you use?

I get mine from Metal Supermarkets, but it depends on where you live.
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Re: Backing plates, what do you use?

If it's hidden, large washers or starboard. If it's visible in the cabin, stainless steel sheet because that's what Bristol used at the factory.

Mc Master Carr for the stainless sheet. I use it for backing plates and stuff like the extra instrument panel below :



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Old 09-05-2013
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Re: Backing plates, what do you use?

As mentioned before, it really depends on the loads on them. I am also not combining different metals, in order to reduce the risk of galvanic corrosion. You can get pieces of 316 steel here on fleebay cut to size. Much cheaper than what the stainless shop close to where I work would charge. I've also used large stainless washers, Nylon washers and as I cannot get StarBoard in the UK, HDPE chopping boards.
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Old 09-05-2013
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Re: Backing plates, what do you use?

Cutting boards are incompressible which is why you can't cut them. Cheaper than starboard!
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Re: Backing plates, what do you use?

I'd use 3/16" G10 Garolite from McMaster-Carr.. You can cut it with most saws (yes, it will ruin the blades) and drill with any drill. It is stronger in compression than Ssteel and will not cause any corrosion.
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Old 09-05-2013
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Re: Backing plates, what do you use?

As you can see from Marksf's post, polished S/S with acorn nuts is the best looking. I prefer to use it or fender washers (on lower loaded hardware) in areas where the backer is visible. Save the Starboard/G10 etc. for the hidden stuff.

Polished S/S is definitely the most work but it looks the best by far and you're only doing it once.

Unless you have a drill press and a band saw with a metal blade I'd strongly recommend getting them roughed out by a machine shop - they can flame/laser/cnc cut the pieces and punch the bolt holes instead of drilling.

File & sand to 1200 then polish them on a $40 Harbour Freight polishing wheel.
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