what wood for new seat frames?

so after i took off the old vinyl i noticed the frames were not as nice as i thought they would be.  so my question is, whats kind of wood do i want to use for my new frames? im going to cut the bucket part into strips for the curved part and fiberglass over it for strenght. 

i saw a sheet of birch that looked like it would make for some nice seats, but $45 has me thinking it might be overkill and id better ask first. i have thompsens water sealer from when i did the bunks on the trailer. so it'll get sealed in that stuff.

thanks

1/2" regular plywood for mine, but completely covered in resin and fiberglassed on the curves and corners for strength.

I used 1/2" marine ply, but like ka0tyk said regular 1/2" is fine.
Marine ply is double the cost.
I glass the crap outta mine.

Regular ply is fine with a good sealer. You only need to fiberglass the joining areas for strength. Small 3-4" wide by whatever length pieces of fiber on those areas. You can do relief cuts in the wood and also bend with the grain for curve...or soak the wood and wrap/tie it around something round and let sit till dry.

Regular ply is fine with a good sealer. You only need to fiberglass the joining areas for strength. Small 3-4" wide by whatever length pieces of fiber on those areas. You can do relief cuts in the wood and also bend with the grain for curve...or soak the wood and wrap/tie it around something round and let sit till dry.

yeah i saw the relief cuts (slices) AFTER i did my seats.  totaly a better route to go.  then again i built mine inside my office.  oh well, ill use that tip for the next boat!

another tip, like how you see in 76bonneville's and mine, leave a little tack strip along the bottom inside so the upholstery guy has something to shoot staples into, and DONT go crazy with the glass there or else they wont be able to shoot the staples through it.  also no sharp corners.

good 2 know  now i dont feel so redneck 4 going 2 do mine in regular ply..

Like all these guys said...1/2 inch...the only other thing I did was the bases of the seats I used 3/4...and the other thing I did was buy 7 ply besides 5, but that was just me...probably a little more over kill, but sometimes when you cut ply you will have cut through a knot in the wood, these knots would be in a ply in the middle of the wood...i would fill them with resin...

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Home depot down in long beach has some very nice, almost cabinet grade  7 ply stuff from Chile....and it's cheap.  I used this for my bases and then 15/32" or whatever for the backs.  I glass the curves and joints, then just resin the rest. 

Bit of a thread jack, how the hell ya been Pat

Been busy.  Dragging the boat to Elsinore this morning to have some fun.

yeah i saw the relief cuts (slices) AFTER i did my seats.  totaly a better route to go.  then again i built mine inside my office.  oh well, ill use that tip for the next boat!

another tip, like how you see in 76bonneville's and mine, leave a little tack strip along the bottom inside so the upholstery guy has something to shoot staples into, and DONT go crazy with the glass there or else they wont be able to shoot the staples through it.  also no sharp corners.

So are you laying fiberglass in the corners then putting down the tack strip over it?Also are you resoning the tack strip or just leaving it raw?

I used 1/2" marine ply, but like ka0tyk said regular 1/2" is fine.
Marine ply is double the cost.
I glass the crap outta mine.

I've heard people tell me if im going to resin it not to use marine grade plywood cause it doesnt soak the resin like the regular plywood does,did you experience this?