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Go Back   SailNet Community > On Board > Gear & Maintenance > Installing new deck hardware for a dummy.
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Thread: Installing new deck hardware for a dummy. Reply to Thread
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Topic Review (Newest First)
04-29-2013 12:33 PM
Stu Jackson
Re: Installing new deck hardware for a dummy.

I agree about the fender washers. You need to analyze the loads. On most deck hardware, the load is in shear, especially for cam, clam and sheetstopper clutches. The backing plate is only there to avoid the tightened bolt/locknut and nut from digging into the fiberglass below.
04-28-2013 11:39 AM
asdf38
Re: Installing new deck hardware for a dummy.

I think it's worth remembering that fender washers are not a bad option.

It depends a lot on the geometry involved but I think the plate is best in these cases:
1) Hardware is really spread out, or unevenly spread out
2) You intend to build the plate significantly larger than the hardware
3) You can't fit large circular washers because of limited space outwards.

However when these arn't true, not only do I think washers can be "fine" I think they can be better than the types of plates you often see. For one, a circular washer is a pretty good way to transmit force and does so nice and evenly.

Second, consider the scenario I just encountered - a circular piece of hardware, roughly 3" in diameter with a 3" circular backing plate. The problem with the plate is that it's only transmitting force in a 3" circle. Fender washers however, comparatively, spread the force outward (if there is space to do so). If I install fender washers and then draw a circle around them I'll have something with a diameter of 4" or more. Yes there are some gaps in this circle but the fiberglass will effectively bridge some of these gaps and overall if I replace this compact backing plate with large fender washers I expect it to be a net positive.


I think a properly designed backing plate always can be better than fender washers, but not necessarily significantly, and perhaps not worth the cost.

If you don't take my word for it I believe I've seen Mainsail say something similar - that fender washers with a sound deck are perfectly fine.
http://www.sailnet.com/forums/gear-m...tml#post807735

Note: McMaster.com sells 316 fender washers for 1/4" hardware up to 3" in diameter - that's huge.
04-27-2013 11:22 PM
jimgo
Re: Installing new deck hardware for a dummy.

You could even put the wood over the stainless plates if you want to be really "thorough".
04-27-2013 11:03 PM
MarkSF
Re: Installing new deck hardware for a dummy.

That sure does look nice!
04-27-2013 08:12 PM
mad_machine
Re: Installing new deck hardware for a dummy.

Quote:
Originally Posted by dvuyxx View Post
Does anyone ever make teak covers (or some other kind of cover for these plates and bolts. I have a few in my cabin. Or do most people just leave them as is?
the Seasprite 23 "heritage" the owner used wood to back the deck hardware you can see from inside the cabin. This was what he did to back a cleat:

04-27-2013 09:57 AM
CS Cruiser
Re: Installing new deck hardware for a dummy.

Quote:
Originally Posted by dvuyxx View Post
Does anyone ever make teak covers (or some other kind of cover for these plates and bolts. I have a few in my cabin. Or do most people just leave them as is?
I cover mine with 4" & 6" teak winch base pads, just recess the back side and match up a few of the hex bolt caps for a pressure fit, easily removed if you have to and they never have fallen off.
04-27-2013 09:34 AM
killarney_sailor
Re: Installing new deck hardware for a dummy.

I don't think anyone covers these. I think they look good, part of the boat vibe.
04-27-2013 08:43 AM
jsaronson
Re: Installing new deck hardware for a dummy.

INstead of stainless backing plaates you can use either aluminum or G10. Both are cheaper and easier to cut and drill.
04-27-2013 08:39 AM
dvuyxx
Re: Installing new deck hardware for a dummy.

Quote:
Originally Posted by MarkSF View Post


Does anyone ever make teak covers (or some other kind of cover for these plates and bolts. I have a few in my cabin. Or do most people just leave them as is?
03-30-2013 01:26 PM
MarkSF
Re: Installing new deck hardware for a dummy.

"On my current boat there are a total of two patched holes that are visible"

Must be some hardware you can mount there!
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