Refixing inner forstay plate into wood - SailNet Community

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  #1  
Old 04-16-2008
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Refixing inner forstay plate into wood

Hi guys,

last week noticed that the stainless steel inner forstay plate was lifting with the top of two bolts rusted off. Tried to remove the remaining bolts and they broke off leaving about 3-5mm (0.1-0.2 inch) protuding from the wood. The plate is connected to the timber that extends forward and become part of the wooden bowsprit. The timber is about 10cm (4 inches) thick at that point.

Trying to figure out how to reattach & have come up with the following options:
  1. drill out the old bolts with a small drillbit and tap into the remains of the bolt, then use a smaller diameter bolt
  2. drill out the bolts with a large drill bit (effectively removing the old bolt), fill up the holes with epoxy then tap into the epoxy and bolt
  3. grind the bolt studs down, shift the plate forward by 10-15mm (0.4-0.6 inch), drill new holes and screw into the wood

Note that I do not have access underneath so bolting through the deck is not an option.

Opinons / alternatives welcome
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Old 04-16-2008
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An inner forestay, that is usually used for storm sails, isn't something that you want connected without through-bolting IMHO, even if it means using 5" long bolts to do so.
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If you have access, how about having a bracket made that goes across and down the sides of the timber, and then through bolt sideways? You could have the original plate welded to the bracket.

From your avatar I'm assuming we're talking about some sort of timber bowsprit here?

A picture would help a lot.
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Old 04-16-2008
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I like fasters idea a lot. One thing you should do is get the old screws our of there as you don't want them further deteriorating within the wood. Fill with epoxy and then mount the new bracket.
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Pictures

Sorry about the quality but it's the best I got at the moment. I'll see if I can figure out how to post them in the thread.

Camaraderie, I'll probably get at least one of them out to determine whether they are screws or bolts. I suspect they are screws. For any I leave in I plan to grind out the tops and fill with epoxy to seal them in. That way corrosion will be stopped.

Faster, that sounds like a good idea. I'll check whether they are screws or bolts first. If they are bolts that would be a good way to reinforce.

Sailingdog, where this is would be very hard to access underneath. Would have to cut through two bulkheads and then you would still have two sampson posts in the way. Plus I suspect that the plate is currently screwed into place with at least 1/2 inch stainless steel screws. It has not moved for almost 30 years so seems to be fairly solid. Also note that only 4 screws were used, where the plate can take 6.
Attached Thumbnails
Refixing inner forstay plate into wood-131_3168.jpg   Refixing inner forstay plate into wood-131_3168_1.jpg   Refixing inner forstay plate into wood-131_3168_2.jpg  
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Photos loaded

Hopefully this works






Last edited by Ilenart; 04-16-2008 at 12:54 PM.
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Looks like you will be crawling inside the focs'l to inspect the backing plate in that section of the bow. The bolts and nuts may have been coated with fiberglass/resin thus making it very difficult to remove said items.
I found this to be true when changing a cleat on one vessel.
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Perhaps it's an illusion, but it looks like there's space between the sprit and the deck... is there?... or is it just the side platforms that are off the deck?

In any event it looks like a sideways throughbolted bracket could work for you - though you may have to modify the timber cross pieces to make it fit well. I'd make sure the sprit is truly sound first, and make sure you leave enough "meat" around the bolts for strength.
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It looks to me that the bowspit thingie is centered in the back between the postee things and centered by the shinny horizonal brakets on the sides.

The chain below pulls down and the fore stay pulls up and is stoped by the contact between the poats and the deck.

I say get rid of the anchors, fore stay and the side mounts and the board thingie should lift from the back for access to the bottom after removing the long bolt between the posts.

Last edited by timebandit; 04-16-2008 at 01:19 PM. Reason: To add 8 words
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Quote:
Originally Posted by Faster View Post
Perhaps it's an illusion, but it looks like there's space between the sprit and the deck... is there?... or is it just the side platforms that are off the deck?
There is space under the left and right side platforms, probably 2-3 inches, however the main centre timber is mostly flat on the deck. From memory a couple of sections under the main timber have a gap or 2-3mm. Need to check when I am next down on the boat.

Quote:
I'd make sure the sprit is truly sound first, and make sure you leave enough "meat" around the bolts for strength.
The whole sprit is pretty solid. The previous owner added a stainless steel cap which is massive. I've found a couple of extra photos that show this.





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