Please opionions on best COMPOSITES for stringers

[3rdday]

Please opionions on best COMPOSITES for stringers.
Foam Filled with 2 part USCG?? Coosa,Nidabond,nidacore,Divinycell,Seacast??????? Or build up existing with layers of glass and no core. Want to avoid, rot, waterlog, etc..Much thanks in advance.

[gofastsandman]

Hey 3rd,

Goin to see George at G&S Fri about a similar problem and I`ll ask him.
GFS

[3rdday]

Great, I really appreciate the willingness to help. If you don't mind ask him what the opinion on cutting the caps off the stringers and gutting then filling with pourable or rigid foam like divinicell or using a pourable composite like seacast or Nida bond(transom filler)Then re-capping the Stringers.
Thank you.

[htillman]

It will be interesting to find out the opinion from G&S. But from what I have read on this website, cut the tops off, remove old foam, install new foam (2 part) and then reinstall the tops. Refer to Stricks string if I remember correctly. The USCG has a requirement for foam. I would not put Seacast or a hardened product in the stingers. Weight of these products may become a facter. I drilled holes in the bottom and top of my stingers and let them dry. I will reseal them when I seal the top hatch.

[Islandtrader]

Please opionions on best COMPOSITES for stringers.

This is something I just read...and since I am new at the restore stuff I will be interested in knowing what folks think.

The article stated that you should stay with like material, if you are only replacing sections of stringers etc. wood stay with wood, foam, stay with foam.

I know some of the 21's stringers glass has pulled away from the stringer, now looking for the right and easiest way to fix.

[3rdday]

Terry,
Where did glass pull away? Where the stringers are tabbed to the hull?

[Baranx4]

Mas epoxies has a video on stringer installation using composite. They use prisma or somthing like that the email address is at the end of the video. I was surprise to find out that the bonding for composite stringers is easier time wise atleast that's what they said.

[3rdday]

Great videos,thanks for the suggestion.

[flyingfrizzle]

bump on this older post, Like to know some more current info on today's composites that are available to core stringers and bulkheads out of. Thinking about using Coosa Bluewater 26 3/4" For the stringers and bulkheads. Is this a good product for this type or application and would like to know the best way to wrap it in and glass it to the hull. I herd that you don't need to use 1708 over it. Like to know opinions on how it should be glassed and tabbed in.

[Blue_Heron]

Originally Posted by flyingfrizzle

Like to know some more current info on today's composites that are available to core stringers and bulkheads out of.

All of the folks who mentioned flex are right. You need a stringer and bulkhead system that absorbs shock, so it doesn't overstress any single component.

While you will get some good ideas from this and other forums, you may get some ideas that are not so good as well. If you find yourself contemplating materials or methods of construction for your project that are not in common use by quality boat manufacturers, ask yourself why. Those guys have a strong incentive to build for light weight (less material=less cost), good strength (fewer warranty claims), and durability (a good rep in the industry sells more boats).

You will find DIY boat restorations that are every bit as good, or in some cases better than the original (strick's work comes to mind). But you will also find half assed jobs that result in heavy structures that are not as strong or long lasting as original and look like crap to boot. Which end of the spectrum do you want your work to be on? The key difference is how well you educate yourself before you start.

Do yourself a favor and buy Dave Gerr's The Elements of Boat Strength. He does a good job of explaining boat structural components and why they are constructed as they are, as well as why some fail. If nothing else, it will help you tell the difference between good and bad advice.

Dave