Backing plates, what do you use? - Page 2 - SailNet Community
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post #11 of 26 Old 09-05-2013
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Re: Backing plates, what do you use?

The backing plate is only one component – you must also think where you are positioning the hardware – some places have balsa core which cannot take the compression when you tighten the bolts. If this is the case you’ll need stainless spacers to put the bolts inside – they will take the load without damaging the deck. And don't forget the butyl....
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post #12 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

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Originally Posted by SVTatia View Post
The backing plate is only one component – you must also think where you are positioning the hardware – some places have balsa core which cannot take the compression when you tighten the bolts. If this is the case you’ll need stainless spacers to put the bolts inside – they will take the load without damaging the deck. And don't forget the butyl....
remove the core around the bolts and fill with thickened epoxy to prevent compression use a countersink to allow butyl to form O ring around the bolts
my $ 0.02
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post #13 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

G10 for material.
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post #14 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

Starboard, and cutting boards are not sutable for backing plates. The plastic they use is junk, and will deform under light compression loads applied for any length of time. I don't know who first thought of them, but it is a terrible idea.

The prefered is either a stainless plate, which should be available at almost any metal shop for a couple of bucks, or G10. G10 is a fiberglass board made under high pressure, and is extremely strong. It does tend to ruin blades, but bi-metal or carbide blades work ok. Just go slow since the board won't disperse heat like cutting into metal will.

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post #15 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

You can order them custom made to your specs here: https://www.stainlesssupply.com/orde...eel-sheets.php

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post #16 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

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Originally Posted by Frogwatch View Post
I'd use 3/16" G10 Garolite from McMaster-Carr. It is stronger in compression than Ssteel and will not cause any corrosion.
I don't believe G10 is stronger in compression than stainless steel.

Corrosion? The nuts and bolts will be stainless as well so no problem there.

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post #17 of 26 Old 03-19-2014
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Re: Backing plates, what do you use?

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I don't believe G10 is stronger in compression than stainless steel.

Corrosion? The nuts and bolts will be stainless as well so no problem there.
Actually G10 is stronger in compression.

G10 is 365 GPa, versus 310GPa for 316 stainless.

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post #18 of 26 Old 03-20-2014
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Re: Backing plates, what do you use?

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Originally Posted by Stumble View Post
Actually G10 is stronger in compression.

G10 is 365 GPa, versus 310GPa for 316 stainless.
I didn't know that, interesting.

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post #19 of 26 Old 03-20-2014
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Re: Backing plates, what do you use?

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Originally Posted by Stumble View Post
Actually G10 is stronger in compression.

G10 is 365 GPa, versus 310GPa for 316 stainless.
I think you mean MPa (MegaPascals).

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post #20 of 26 Old 03-20-2014
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Re: Backing plates, what do you use?

Lol, WOOPS. Good catch Laurence.

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