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Go Back   SailNet Community > On Board > Gear & Maintenance > Can Be a Big Job - Support Board
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Thread: Can Be a Big Job - Support Board Reply to Thread
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Topic Review (Newest First)
06-13-2007 01:32 PM
Hawkeye25 I would get a 2" x 4" piece of heavy-wall channel iron, bore an appropriate hole in it, grind it clean, prime it with a couple of coats of Interlux 2000 barrier coat, dig out the rotted wood and fill it with West epoxy and sawdust, install the channel face down secured only with an ample coat of 3M 5200, then paint it all a nice white so you can easily see when the iron starts to rust. The channel should be about 18" to 24" to disperse the load and make max use of the 5200 bonding, but a foot might work as well.

This will give you plenty of time to consider tearing the whole aft section apart and laminating in another full beam. You may never have to.

Hawk
06-13-2007 11:02 AM
Freesail99
Quote:
Originally Posted by LaPlaya
Yep danger there.
AL
Did you read what I just wrote in the post before your post ?
06-12-2007 10:52 PM
LaPlaya
rot

Quote:
Originally Posted by sailingdog
Freesail-

it would help a lot if you said what kind of boat this is on and if you posted a photo of the part.

An engineered laminated beam may be much stronger, but most aren't designed to be used in wet environments, and if it is, it may delaminate more quickly than the plywood did.
Yep danger there.
AL
06-12-2007 07:51 PM
Freesail99 I posted some pictures of the problem area which was about 4 to 5 inches from the shaft. So I cut out the top layer of 3/4 plywood. A piece about 8 x 30 inches and screwed and epoxied in a new piece of marine plywood. I then used thicken epoxy with some 6.5 oz fiberglass cloth and covered both layers of the 3/4 plywood. I encapsulated the wood. I also replace the 4 inch plate in the cockpit seat where the leak came from. It was where the emergency rudder would connect to the rudder shaft.

Thanks for asking
06-12-2007 07:38 PM
DeepFrz FreeSail99, how have you make out with this?
05-20-2007 08:40 PM
Freesail99 There seems to be enough room on the depth of the shaft to add a 1/8 maybe 1/4 inch metal plate to the top of the board. That was my original idea of how to fix it. maybe 24 to 36 inches long.
05-20-2007 08:35 PM
DeepFrz hs, sounds good to me...
05-20-2007 08:34 PM
sailingdog I would try and repair the wood using thickened epoxy and then add an aluminum or stainless steel plate over the whole thing and have the bolt go through the plate. Then bolt/screw the plate down. That will spread the load out a lot more than just repairing the wood will.

I just don't know if you've got enough thread left on the rudder stock bolt to do this... conversely, you could thin the wood a bit if you're going to be using a metal plate to spread the load out.... and that would give you the room to fit the plate. YMMV.
05-20-2007 08:32 PM
hellosailor DeepFrz, when you say "scarf in"...simply cutting a piece out of dropping a new piece in, which is simply a butt joint on all four sides, might or might not do--depending on the strains and exactly what this board is. (Which I confess I still have no real grasp of at this point.)

Just how are you suggesting he scarf it in??? (Which usually means at least a 45 degree angle on all joint surfaces, to me.)
05-20-2007 08:31 PM
Freesail99
Quote:
Originally Posted by DeepFrz
I don't see any reason that you couldn't cut out the rotted area and scarf in a piece of wood to replace the area cut out. If I were doing it I would sand everything back to good wood and then coat the wood with several coats of epoxy resin, perhaps even adding several layers of fiberglass cloth to the top. Make sure there is no rot back where the shelf joins the bulkhead.

That is my plan. I was even to drill some holes and fill the boards with epoxy to add strenth between the boards. Thanks
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