Oops! Results of Half-Assed Repair

[CharlieCobra]

On pulling the canvas on Oh Joy, I found a patch of epoxy or some other resin laid in around the aft port lower chainplate. After digging it out, I found rot underneath. Apparently, the morons didn't dig the rot out or treat with Ethylene Glycol to kill the spores. These pics show the extent of the damage AFTER I dug out the rot.

The bit of deck lost from the preliminary cut.



More detail



Where the Sheer plank bolt passes through the chainplate to the stringer.



A view of the remains of the rib between the planks and the chainplate.



Some damage to the sheer plank.



The stringer after the rot is dug and chiseled out.



Interior views of the mess.







The outside of the hull where this damage is.



The fact that the glass overlaps the sheer plank makes it impossible to pull it but also keeps everything rigid and in place is a double edged sword. I could've sailed like this for many years without issue since the chainplates go so deep and are banded down to the keel on Oh Joy (she's built like a tank) but I'm gonna figure out a way to replace the bad sections of wood. I'll use a combination of wood, epoxy and fasten the pieces in both mechanically and chemically.

First off is to find a good source for Ethylene Glycol to kill any spores. Then I treat with CPES to restore the remaining wood structure and follow with the replacement pieces. I'll bolt, screw and epoxy it all in place and no, that deck cut isn't the final cut...

[DavidGC]

Any auto supply store will get you all the EG you need -- it's antifreeze. Not the "safe" kind they make you use in California. Use the old-fashioned stuff.

[Christian Van H]

Sounds like you've got it in hand. I love CPES, and we're fiberglass! That chainplate scares me though...any possibility of replacement? C

[CharlieCobra]

The chainplate is still solid. I'm gonna scarf in the upper rib section, back screw it to the planking and bind everything up with a custom through bolted tang that ties together the rib, chainplate and stringer...

[sabray]

I did a similar job ways back. I used the old plates for backers cut off below deck and put new external chainplates. Its worth considering it gets rid of that joint through the deck. just a thought

[Randy]

You might try System Three's rotfix system. They use boric acid pellets to kill the spores, an epoxy to solidify the surrounding wood & epoxy filler fill the void in areas that are too difficult to scarf well.

[CharlieCobra]

Originally Posted by sabray

I did a similar job ways back. I used the old plates for backers cut off below deck and put new external chainplates. Its worth considering it gets rid of that joint through the deck. just a thought

Yeah I'm considering going external.