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Thickness vs strength
By:Greg
Date: 4/26/2000, 12:54 am
In Response To: Re: Guillemot cockpit coaming lip height (Shawn B)

I used 4 ply's of 1/8" ash, 5/8" high,only the vertical strips are glassed. Without a doubt, overbuilt but I can pick the boat up by the coaming ring. I tried to pick up a friends fiberglass boat the same way, before I could clear the ground, I could hear the glass cracking.

Greg

: Just to make the decision a little tougher...

: Oak doesn't bend well; you might try bending a test strip to make sure one of
: your "good" strips doesn't break when you go around the sharp
: curve at the back of the coaming. You could consider steaming them. Clamp
: them in place one at a time at the middle of the back of the cockpit.
: Place a damp rag over the strip and steam it with a hot household iron.
: The strip will become much less rigid and you can iron the strip around
: the coaming riser. If you used hot melt glue to hold the riser strips
: together, make sure you don't get that riser too hot!!

: You don't want any less than 1/2"--3/4" is a "nice"
: height.

: 5/8" is a pretty good width; 7/16" is a little tall. If you're
: fiberglassing the coaming, you don't need more than 1/4" of wood
: there. You really just need the lip under the wood to retain your
: sprayskirt bungie.

: 7/16" wide strips will be easier to keep aligned while you're bending
: them together around the riser. If it looks too tall to you after it's
: glued up, don't be afraid to sand off a good bit of the total height--it
: won't do you much good after the installation of the lip.

: I plan to use 1/4" strips, but I'll install them one at a time to keep
: them aligned better.

: Food for thought: commercial fiberglass coamings are less than 1/8"
: thick and they really hold the sprayskirt well.

: Shawn

Messages In This Thread

Guillemot cockpit coaming lip height
Ed Walshe - Dublin Ireland -- 4/25/2000, 6:28 am
Re: Guillemot cockpit coaming lip height
Shawn B -- 4/25/2000, 11:38 am
Thickness vs strength
Greg -- 4/26/2000, 12:54 am
Re: Thickness vs strength
Shawn B -- 4/26/2000, 12:00 pm
Thank you
Ed Walshe - Dublin Ireland -- 4/25/2000, 9:28 am
Re: Guillemot cockpit coaming lip height
Marcelo -- 4/25/2000, 9:11 am
Re: Guillemot cockpit coaming lip height
Tony -- 4/25/2000, 8:04 pm
Re: Guillemot cockpit coaming lip height
Tony -- 4/25/2000, 7:52 pm
Re: Guillemot cockpit coaming lip height
Shawn B -- 4/25/2000, 11:30 am
Re: Guillemot cockpit coaming lip height
Greg Hicks -- 4/25/2000, 8:28 am
Re: Guillemot cockpit coaming lip height
Brian B -- 4/25/2000, 7:42 am
Sorry, I was not clear enough
Ed Walshe - Dublin Ireland -- 4/25/2000, 7:59 am
Re: Sorry, I was not clear enough
Nick Schade - Guillemot Kayaks -- 4/25/2000, 9:10 am