1708 mat for stringers

[tartuffe]

2 sheets is fine, that is what the factory originally installed.

[cterrebonne]

Originally Posted by tartuffe

2 sheets is fine, that is what the factory originally installed.

Sweet. You think I should use 3 since I'm going with a bracket? Or the knees would be fine?

[tartuffe]

I don't have any experience with brackets and don't know how they distribute force on the transom.

[jasoncooperpcola]

Original transom has two layers. Whoever rebuilt the transom in the 18 Fisherman i have used three layers of plywood. The transom is rock solid.

CTerrebonne why not use one piece stringers that extend out the transom and build a bracket off them? That is what i am trying to figure out how to do now. Then you have no load on the transom unless you want it to be loaded. I plan on one layer of 3/4 ply in my transom. Just an idea,.

On a side note, one of the major bracket manufacturers says in their online installation instructions, if the transom has soft spots or rot to add one piece of 3/4 ply to the inside of the transom.

[cterrebonne]

Extensive the stringers out would make a really strong bracket. I am trying to go as light as possible. I am planning on using a aluminum bracket with out a platform. Sounds like 3 pieces of ply with knees glasses in is the ticket. I have a lot of woven roven. How would that help if used it between each piece of ply. Another thing, does the ply goes against the skin with just epoxy pb or do I put a piece of bi axle in between thE wood and the back skin?

[jasoncooperpcola]

What the hell is PB? I think you just laminate the ply straight to another piece of ply nothing in between. Same for the transom.

[phatdaddy]

peanut butter


the consistency of the mix of epoxy & filler

[tartuffe]

Originally Posted by cterrebonne

Extensive the stringers out would make a really strong bracket. I am trying to go as light as possible. I am planning on using a aluminum bracket with out a platform. Sounds like 3 pieces of ply with knees glasses in is the ticket. I have a lot of woven roven. How would that help if used it between each piece of ply. Another thing, does the ply goes against the skin with just epoxy pb or do I put a piece of bi axle in between thE wood and the back skin?

You will want to coat the transom skin with a layer of PB using a notched trowel, coat the plywood the same way. Squeeze together and clamp. After it cures you will do the same thing with the next layer. A good amount will squeeze out and that is a good thing. Also coat the wood with alayer of straight resin to soak into the wood prior to covering with PB.

PB mix I use is resin, cabosil, and 1/4" chopped glass fibers. Those fibers add a great deal of strength.

[Kracker Jack]

Just like what Tartuffe said, you can also thump the transom with a rubber mallet after you apply your clamp pressure, this will seat the core and PB.