Glen-L.com

Hey so I am getting close to the Chines and Sheers. I have a question that I have not been able to find an answer to on the forum or boat building with plywood. (Although I did find a lot of good info on here).

From what I have been reading it seems like a lot of people use multiple layers for the chines and sheers, then laminate them together while on the boat.

In order to do that do you have to have chines/sheers that are all one piece of wood? I dont get how you could do it like this if you have shorter lengths of wood that you have to join unless there is a different way to join it than I am not thinking of.

Would you have to do a seperate scarf joint on each layer? So say you use 2 or 3 layers for the Chine, Would you need a seperate scarf on each of those layers and then laminate the layers together?

I am building a zip and for my chines, I did not laminate. For the sheers, I laminated two layers while on the frames. Both of my layers had to be scarfed (I think they needed to be about 15 feet or so and I had 10 ft lumber). I offset the scarf joints slightly but still kept the scarf joint in a relatively straight section of the shear. Here is a link to my blog where I was working on the chines and sheer viewtopic.php?f=17&t=14014&start=30
Also, if you go to the link above, then go to the previous 'page', I think I have some photos of the scarf joints I made.

I guess to specifically answer your last question....if your lumber is not long enough to make the entire chine, then yes, you would need to scarf joint the layer. Each layer can be scarfed if you need to.

Just remember to keep the scarf in a relatively straight section, as the epoxied scarf joint will resist being bent.

Lay in one layer at a time. If the pieces are too short to make the whole length just scarf enough together to get the job done. Just don't allow scarf joints to line up with each other and also best not to let them lie over a frame.

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Dave

My Riviera build - the Midnight Cry Project

Video of Midnight in Action
Blog

Few things in the world measure up to the thrill and satisfaction of boating in a boat that you built.

so....

if I had a chine that was say 18mm thick , I could lay 3 x 6mm pieces one at a time - bonding with epoxy - making the whole bendy thing real easy ?

this is going to be very easy to do and maybe even stronger/better than bending one piece maybe?!?!?


I'm seriously green to this! Isthat what you meant?

JW

Not sure you would want pieces that thin. Yes, thin pieces will bend easier, but you don't want them to bend so easily where you could end up with a sharp bend at a frame point, as opposed to the more sweeping bend you'll have with a thicker piece.

I didn't laminate my chines, but if I did, I'd do it in just 2 layers. That should be plenty easy to bend.

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Jeff

My Celerity build.

ahhhh got it, too bendy = not so good, thanks