Regarding hard points while bedding stringers

[chconger]

Hi All

I will be installing stringers soon on the Glastron. I read that they are not to touch the hull, but must float a 1/4 inch above to avoid hard points.

Now I see a lot of people use PL Premium as a bedding. Is this because it stays a bit flexible after is dries? And does that mean using peanut butter is not an option?

Same question for the gap around the transom.

Thanks
Chris

 

[ondarvr]

Re: Regarding hard points while bedding stringers

It's a good practice to keep the wood up off the hull, it really doesn't matter how you do it or what you use. Most of the manufactures of small boats don't do it, they just lay the stringers right on the hull and don't have any problems.

 

[sevanseriesta]

Re: Regarding hard points while bedding stringers

I was gonna say mine where on the hull, however I did lift them up on popsicle sticks this time. And I used PB and I am not sure how that would not make a hard spot cause the stuff has no flex in it.

 

[Georgesalmon]

Re: Regarding hard points while bedding stringers

mix up some PB, let it get hard and hit it with a hammer. Then hit your stringer wood with a hammer. Which is harder?

 

[chconger]

Re: Regarding hard points while bedding stringers

Just to refine what I believe to be the underlying issue;

If the stringer mates imperfectly with the hull (and that's pretty much guaranteed) then it will contact the hull in certain points and not in others.

So with no bedding at all, these contact points become the "hard points" that can cause gel coat cracking etc..

So if the stringer is bedded in PB, then the entire length is "hard to the hull" but evenly along. Problem resolved?

Or is there another reason to want to have some flex between the hull and the stringer?

 

[Woodonglass]

Re: Regarding hard points while bedding stringers

Ka Ching! ^^^ Uniformity!!!! Stick with your PB and you're good to go. I use 1/4" Wooden dowels, 1 on each end. Put the PB in a Zip Lock Back, Cut off a corner and then squeeze it out like a Pastry Bag.

 

[Yacht Dr.]

Re: Regarding hard points while bedding stringers

Just to refine what I believe to be the underlying issue;

If the stringer mates imperfectly with the hull (and that's pretty much guaranteed) then it will contact the hull in certain points and not in others.

So with no bedding at all, these contact points become the "hard points" that can cause gel coat cracking etc..

So if the stringer is bedded in PB, then the entire length is "hard to the hull" but evenly along. Problem resolved?

Or is there another reason to want to have some flex between the hull and the stringer?

I dont think there is much issue with smaller boats and Hard points. Its with the larger vessels that have larger open hull between stringer and bulkheads that cause this problem.

Its called an open pan area.. I doubt you have it.

Good luck.

YD.

 

[chconger]

Re: Regarding hard points while bedding stringers

Thanks Guys.