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Go Back   SailNet Community > On Board > Gear & Maintenance > Embedded Chain plate maint/replacement
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Thread: Embedded Chain plate maint/replacement Reply to Thread
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Topic Review (Newest First)
05-02-2014 10:53 AM
chucklesR
Re: Embedded Chain plate maint/replacement

I wish I could have found someone to do x-ray's.
I"m looking at a one week delay in launching which with other things going on (moving on boat) is going to really set me back.
05-01-2014 01:55 PM
edakira
Re: Embedded Chain plate maint/replacement

An update from my end, ChucklesR. I just had my plates x-rayed (7 of 8 - they couldnt do forward bobstay down at waterline). An outfit that does oil and gas pipeline based in TX theyd never done a sailboat before. The images were very clear and revealing from top of plate down below "bastard" bar and below first of 3 cross bars. I had a local surveyor present to monitor and inspect images w the techs - who were all certified. We were very impressed and pleased w the results, and most importantly the plates all looked clean and free of cracks and corrosion. Cost me a hundred dollars per plate ($700) and makes me feel very confident moving forward w a Gulf crossing planned soon. I can upload a few images once I rcv from surveyor. So much gleaned from your in depth documentation of your own process and understanding exactly what we were looking for and exact plate shape etc. Here's a diagram of the forward bobstay FYI that I rcvd from Gene Gammon. Its from a bigger irwin but he said they were pretty consistent in style. Hope all goes well w your install. Obviously something I'll look forward to someday in the near future as I ponder the long term fix. --E
04-30-2014 01:45 PM
SloopJonB
Re: Embedded Chain plate maint/replacement

Back to wrapping the plates in packing tape and building a landing up with thickened epoxy.
04-30-2014 11:26 AM
BubbleheadMd
Re: Embedded Chain plate maint/replacement

What material will you use for a shim?

Metal? Epoxied-up wood? G10 plating?
04-30-2014 11:19 AM
chucklesR
Re: Embedded Chain plate maint/replacement

Speaking of the whole thread - sometime back I mentioned that I needed to build a platform for the plates because obviously the hull curves. The rigger said no, just a good flat surface and he'd bend the plates to the hull curve.

Guess what, now I need a platform/shim because a) bending 1/4 ss plate ain't so easy and b) doing so puts unacceptable pressure on my cap rail where the plate exits.

1 week to launch and all of it is raining.
04-28-2014 10:05 PM
SloopJonB
Re: Embedded Chain plate maint/replacement

Read the whole thread.
04-28-2014 05:51 PM
johnnyquest37
Re: Embedded Chain plate maint/replacement

Just a thought, but you could leave the old chainplates where they are and rig new chainplates to the outside of the hull, or in the interior. Once you disconnect the shrouds from the chainplates, the old chainplates can stay where they are unless you are dead set on replicating the exact setup you currently have.
04-28-2014 02:33 PM
jimgo
Re: Embedded Chain plate maint/replacement

Good luck, Chuck!
04-28-2014 12:27 PM
chucklesR
Re: Embedded Chain plate maint/replacement

Hey Edakira,

Here's a pic of the 'hole's' fiberglassed over, ready for new plates to be installed.
It just so happens that today is the day the rigging company is measuring and fitting for where to drill the holes; they want to both space them out visually nice and be strong enough.

The forward lowers are indeed hard to get to. I'm not pulling them based on the condition of the four plates I did pull. Instead I'm going to drill a drain hole at the bottom of them, check the water out etc.. and make that a routine check.

The bobstay/dolphin striker plate is also fine, just rebedded. Aft stay is going to get a drain hole and inspection also. At some point I might do the forward lowers and aft stay simply by drilling through in place and bolting them similar to the new plates.

My interpretation of causal factors is: improperly maintained bedding of the chain plates allowed water to ingress into the cavities caused by less than stellar fiberglass embedding (lots of air gap). That water was pretty much in flow, i.e. not stagnant/oxygen depleted so the stainless was never compromised.
04-27-2014 02:00 PM
edakira
Re: Embedded Chain plate maint/replacement

ChucklesR,

I have an 89 Irwin CC38 and am both amazed and depressed by your detailed documentation as you move thru this process. I'd love any current info you're gathering re pix and updates, and also wondering about access to the forward port/stbd plates? Mine (like yours probably?) are buried behind the v-berth bulkhead and seem extremely difficult to access from inside. And also, now that you're on the hard, the bow/bobstay plate down at the waterline? This thread has been extremely informative for me, thanks so much, and hoping you are progressing and soon back in the water.
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