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10-07-2017, 07:18
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#16
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Registered User
Join Date: Apr 2009
Location: CT
Boat: C&C 34
Posts: 1,046
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Re: G10 FR-4 Backing plates
If you don't mind ordering from US, try McMaster-Carr. Tons of sizes
www.mcmaster.com
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10-07-2017, 07:26
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#17
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Registered User
Join Date: Dec 2015
Location: At this moment Basel Switerland
Boat: Endurance 35,1981
Posts: 113
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Re: G10 FR-4 Backing plates
Hi Opie91
I'll have a look at McMaster-Carr
I'm waiting on a quote from the UK we see what they come up with, any ideas of price ?
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10-07-2017, 08:13
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#18
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Registered User
Join Date: Apr 2011
Posts: 2,492
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Re: G10 FR-4 Backing plates
Jamestown Distributors have lower prices than McMasterCarr for what looks like the exact same stuff. They also sell precut smaller sizes, great for backing cleats, blocks, and so on.
__________________
Bristol 31.1, SF Bay.
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10-07-2017, 08:15
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#19
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Registered User
Join Date: Dec 2015
Location: At this moment Basel Switerland
Boat: Endurance 35,1981
Posts: 113
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Re: G10 FR-4 Backing plates
Thanks MarkSF I'll have a look at the website,
It all depends on how much they charge for delivery the boats in Italy and I'm in Basel, Switzerland.
We see, thanks
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10-07-2017, 08:25
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#20
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Registered User
Join Date: Dec 2011
Location: Buzzards Bay MA
Boat: Beneteau 423
Posts: 858
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Re: G10 FR-4 Backing plates
Practical Sailor had a nice write up on backing plates.
One new thing for me was the recommendation to taper the edges to avoid a sharp transition in forces.
https://www.practical-sailor.com/iss...e_12058-1.html
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10-07-2017, 08:43
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#21
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Registered User
Join Date: Sep 2013
Location: San Francisco Bay
Boat: Chung Hwa Boat Builders, Magellan 36
Posts: 446
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Re: G10 FR-4 Backing plates
Another cutting method is a saber saw with a carbide grit blade. These do not dull much and last a long time if not pushed too hard
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10-07-2017, 12:08
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#22
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Marine Service Provider
Join Date: May 2012
Location: New Orleans
Boat: We have a problem... A serious addiction issue.
Posts: 3,974
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Re: G10 FR-4 Backing plates
Quote:
Originally Posted by Madrugada
Hi Stumble,
What thickness did you use in the areas of standing rigging and how did you install,
With thickened epoxy and fiberglassing over the top of the G10 ?
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To use G-10 mix up some epoxy with thickener and apply a 1/8" coat to the entire backing plate, then press it into place. Some of the epoxy should flow out. Clean this up with your finger (in gloves), just like applying caulk you want to leave a quarter round in place.
In a few hours once it has cooked off drill out the mounting holes and bolt in place. You do not need to cover the backing plate with anything.
For lightly loaded stuff like deck hardware and anything not in huge tension I use 1/8" G-10, for heavy loads (winches, deck cleats, etc) use 1/4. Assuming a ~40' boat. For big boats you need to run numbers.
__________________
Greg
- If animals weren't meant to be eaten then they wouldn't be made of food.
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10-07-2017, 12:24
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#23
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Registered User
Join Date: Dec 2015
Location: At this moment Basel Switerland
Boat: Endurance 35,1981
Posts: 113
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Re: G10 FR-4 Backing plates
Thanks Stumble,
So me using 1" thick block of G10 as a backing plate for U bolts to hold inner and outer shroud's in place would be advisable, obviously the block would be cut to size to fit the area let's say 5" by 10' inches
Any tips ?
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10-07-2017, 13:42
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#24
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Marine Service Provider
Join Date: May 2012
Location: New Orleans
Boat: We have a problem... A serious addiction issue.
Posts: 3,974
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Re: G10 FR-4 Backing plates
1" is insainly oversized. Those would be thicker than the backing plates we used on a 70' maxi sleds primary winches.
But if you are mounting them in place of old chainplates I would just match what was there. Surface area I more important than thickness. Thickness determines how much they flex, surface area determines how likely they are to rip thru the deck.
__________________
Greg
- If animals weren't meant to be eaten then they wouldn't be made of food.
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10-07-2017, 16:40
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#25
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Registered User
Join Date: Dec 2015
Posts: 523
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Re: G10 FR-4 Backing plates
I'm not sure what material you have in mind, But I've got a 5'X10' X 1/2" sheet of solid arborite so I've been told from where I got it. It's the hardest, toughest material I ever laid my hands on. I've been using 3/16 SS plate until you mentioned this G10 FR-4 stuff thanks for the Idea.
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10-07-2017, 17:26
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#26
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Registered User
Join Date: Jul 2015
Location: San Rafael, Ca.
Boat: Gaff rigged Ketch[Spray]37' on deck
Posts: 602
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Re: G10 FR-4 Backing plates
Having been a Shipwright and rigger for many year's and understanding that the rig is attached to U-bolt's thru the decks, supposedly without a mishap.The thing is 1/2" deck isn't all that strong and spreading the load only helps so much, if you could transfer the load via a turnbuckle lower down to a bulkhead or what ever, it would help alot without a major rebuild, transferring the load [ubolt thru deck] is used alot on modern designs, one needs to think in terms of what will happen if a knock down happens and not lose the rig.
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10-07-2017, 17:39
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#27
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Registered User
Join Date: Jan 2009
Location: The Maritimes
Boat: 1980 CheoyLee35
Posts: 290
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Re: G10 FR-4 Backing plates
I have used some G-10 as backing plates and pads on my boat with good success. I got mine on eBay as it was difficult to source in Canada at the time. I cut mine with a diamond blade in a cheap ceramic tile wet saw. Works great and pretty much dust free.
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