Corners of New Plywood

[imported_74baja]

Hi, I am replacing a piece of the wood in the dash of my boat. The dash peice is fairly structual on my boat. Only a piece is rotten so that is what Im replacing. I was wondering, when I bond and glass in the new piece, would it be stronger for it to be a piece with rounded corners or square? I can remove the rotten section in either way, since taking out a little good wood does not hurnt anyone, since it is getting replced.
Thanks,
Jack

 

[Bondo]

Re: Corners of New Plywood

Great Question,...............

I'd Think that Round corners would lead to less Stresses,......
And allow more space for the Glue of your choice,....... Epoxy would be Mine......

I work Alot with Steel,........ Rounder is Always Better than Pointy........

 

[imported_74baja]

Re: Corners of New Plywood

Thanks Bond-O
I was planning on using epoxy (with calloidal silica for bonding), and Now I think Ill round my corners. I have some biaxial cloth left from my transom replacement,, so Ill throw a layer of that over it.

 

[brodie6]

Re: Corners of New Plywood

Thanks Bond-O
I was planning on using epoxy (with calloidal silica for bonding), and Now I think Ill round my corners. I have some biaxial cloth left from my transom replacement,, so Ill throw a layer of that over it.

I have to do the same thing. Should I use a 1x1 block in the corner to screw to? Also when you say round the corner do you mean sand the point off?

 

[Old Salt Oz]

Re: Corners of New Plywood

G'day Brodie6,

Agree corners should be well rounded; also note, timber should be coated with an epoxy resin prior to installing, you can this an epoxy with Methylated spirits up to 40% by weight after mixing the hardener, this will help it soak in and penetrate the fibres.

Rather than just epoxy and thickener in the gap, consider adding some Micro-fibres instead, this will increase the strength and be easy to work as you can control the thickness when mixing.

Just make sure you clean off any excess material because it's very hard to sand off after curing.

Avagoodweekend......