bedding the stringers

Curapa · #1 10-08-2011, 10:32 PM

You want to take epoxy resin and mix it with a filler to fill the gap. There are many different formulas but I use Epoxy and West System 406 for my glue and fillets. I use micro balloons and Aerosil for fairing.

The epoxy glue will be the thickness of peanut butter, spread it on the stringer and put them in place. Then use the epoxy to make a fillet along the side of the stringer.

Curapa · #2 10-08-2011, 10:36 PM

There is a lot to learn but this will get you started.

http://www.epoxymethods.com/filleting.htm

Check out http://forums.bateau2.com/ for some more info on just about anything to do with boat repair.

Kracker Jack · #3 10-08-2011, 10:42 PM

very cool thanks for the help. I was gonna keep the existing"bed" with about 1 1/2 of the factory lay up there as a guide then use the 5200 to bed the stringer in the factory groove then glass over the whole stringer and tabbing into the floor about 6 inches. Is that a proper way to do it?

Curapa · #4 10-08-2011, 11:05 PM

If you have it all the way down that far I would just start fresh. Grind off all of the old stuff and put down the new. It will probably be easier anyways.

Either way you don't want to use 5200 for a structural part. You may be thinking that the glass wrapped over the stringer will be enough but don't give it that much credit. 5200 has many great properties but shear strength is not one of them. You are gonna have to get familiar with epoxy glue, fillets and fairing anyways. Bite the bullet and get some epoxy supplies.

Kracker Jack · #5 10-09-2011, 10:02 AM

Curapa that bateau 2 link has some awesome info on there. Great link for someone getting started with this stuff. This is my first boat repair of this magnatude and Im just trying to do this the right way the first time. The previs owner just stacked a 1x4 on top of 1x6 and let her rip!!!!! LOL!!! so demo was very easy. Can i use the 1708 to glass in these stringers or do you recommend something else? Thanks for all your help

Curapa · #6 10-09-2011, 02:38 PM

1708 would be great for that.

bksah2 · #7 10-10-2011, 02:08 PM

I was wondering the same thing when replaceing stringers ,,They allways say dont have any HARD SPOTS when replaceing them or your hull could blow apare while you are hitting the waves ,,,I could never understand what "they" meant by NO Hard Spots... Some things i read even says to leave a void between the hull and the bottom of the stringer while others have said lay down a heavey bead od 5200 construction adhes. ,,and i seen also where they dig out all the wood in the stringer and leave the fiberglass sides and fill the strings void up with the same stuff they use for the trasom ,, the hole stringer rebuild thing seems to be very very confuseing to me,,,, I Know we got some real fiberglass pros on here maybe we can come to a "THIS IS THE BEST WAY TO DO IT procedure" like what epoxy,,, what filler,, what mat,, etc ,,,,,With step by step instructions like fiberglass for dummies

THEFERMANATOR · #8 10-10-2011, 02:23 PM

I'm no fiberglass pro, heck I wouldn't even make a fiberglass rookie. But I do know that the stringers are the strength in a non cored hull boat. Without stringers the boat would just crack apart to pieces as soon as it was put under any sort of load. From what I know teh stringers should be firmly atatched to the hull bottom to retain max strength and rigidity. I know BERTRAM and some others played around with hollow tabbed stringers, but many have replaced these with cored stringers due to flex and cracking issues with the tabbed stringers.