when replacing full stringers what's the best way to support boat -on trailer or jacks ?
what do most use for wood - 2x6 or cedar or plywood or lvl or what?
is it best to have one piece stringer or can you piece it together for length?
thanks

If it is a decent bunk trailer it should be fine. I'd rather have it on a bunk trailer than jacks. If you don't have a trailer then you can build a cradle to support it on the ground.

I used Arauco (sp?) 1/2" doubled up plywood for mine, I think it was an A/C grade and I put the knots on the inside of the sandwich. I used 1.5 oz CSM to 'glue' the two pieces together. I didn't scarf the joints, wouldn't be a bad idea to do it tho. I think my main stringers were around 15 feet long.

When I was doing mine, I added a couple of stringers outside of the main ones before I pulled the mains out. When doing the mains, I only replaced one at a time.

If you have a bunk trailer you should be ok there. Keep checking the bottom of the boat with a strait edge to make sure it does not move at all. If the transome hangs over the end of your trailer pull the boat forward first. Only remove one stringer at a time. It is tempting to pull them all out to get the nasty grinding done first but it weekens the boat to much IMO.

You should reproduce what they have done in the boat. Anything else you are risking if it will still be strong enough. The boat was engineered so if you change it you run a risk....

thanks
audio what material did you use

Check out Greenwood plywood its treated then kiln dryed in a way resin will adhere many boat companies are using it. Ive gotten it 10' long and 1/2, 5/8 or 3/4 laminate and scarf makes great stringers.

I used Marine Mahogony plywood. You have to get the correct stuff so that it will bond to the resin/glass.