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How many layers of 1708 on stringers

Old 04-15-2016, 04:42 AM
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Default How many layers of 1708 on stringers

Getting ready to do my stringers, coosa board is on the way and will be using 1708. How many layers do I need? 23' Dusky
Old 04-19-2016, 07:25 AM
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????
Old 04-19-2016, 07:30 AM
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No one answer. The glass is part of the stringer structure, how much to put on depends on the depth of the stringer and it's length between bulkheads.'

Post photo of the stringer/bulkhead system.
Old 04-19-2016, 08:04 AM
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Originally Posted by Corndog38 View Post
No one answer. The glass is part of the stringer structure, how much to put on depends on the depth of the stringer and it's length between bulkheads.'

Post photo of the stringer/bulkhead system.
This and 1708 is not ideal for stringers unless thay are capped with unidirectional.
Old 04-19-2016, 07:06 PM
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I think 2 layers of 1708 on the stringers and about 3 more to tab them in with a good radius were it meets the hull.

Lots of other members here with more experience than me, they will chime in.

Post some pics of the Dusky or a link to the thread of you have one started.
Old 04-20-2016, 05:55 PM
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That sumbitch ain't gonna glass itself. Get it going!!
Old 04-21-2016, 12:28 PM
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Replace the same thickness of glass you removed plus some tabbing strips.....a layer of 1708 is a little under a 1/16 of an inch thick....so if your original glass was 1/8 or so inch thick, I would use 3 layers of 1708 to cover from the top edge of the stringer, down the sides and about 12 inches on the hull bottom, with overlaps, depending on space. Cap over the top with some 0/90 1808 or unidirectional as suggested. And use some narrow glass tape to first tab the corners/fillets to the hull. 2 to 3 layers of 12 oz at 6 inch wide, overlapped should do it.
Old 04-25-2016, 06:09 PM
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I used three tab in the stringer and two up on the sides.
Old 04-26-2016, 05:05 PM
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Either match/exceed what you had before in terms of thickness, OR calculate it.

Joel
Old 04-26-2016, 05:08 PM
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Originally Posted by commuter boats View Post
This and 1708 is not ideal for stringers unless thay are capped with unidirectional.
just curious as to why it is like that?
Old 04-26-2016, 08:36 PM
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Originally Posted by Shine View Post
Either match/exceed what you had before in terms of thickness, OR calculate it.

Joel
how do you calculate it?
Old 04-27-2016, 03:30 AM
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Originally Posted by carribbean soul View Post
how do you calculate it?
a 4 page spread sheet with just about every variable imaginable
Old 04-27-2016, 08:00 AM
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Originally Posted by midcap View Post
just curious as to why it is like that?
The fibers are considerably stronger along their length, across the fibers all you have is the strength of the resin. Stringers should be laid up with fibers running their length.
I'm on my phone and don't care to elaborate further at this time.
Gerald
Old 04-27-2016, 08:29 AM
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Originally Posted by commuter boats View Post
The fibers are considerably stronger along their length, across the fibers all you have is the strength of the resin. Stringers should be laid up with fibers running their length.
I'm on my phone and don't care to elaborate further at this time.
Gerald
That makes sense and I guess why roven works good enough for a budget build.
Old 04-27-2016, 04:03 PM
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Originally Posted by midcap View Post
That makes sense and I guess why roven works good enough for a budget build.
Lots of boats are built with woven roven. Its not just for a budget boat. IMO woven roving when used in combination with chop strand mat is idea for layup on hulls and stringers.
Old 04-28-2016, 04:17 PM
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Originally Posted by midcap View Post
That makes sense and I guess why roven works good enough for a budget build.
Originally Posted by surv View Post
Lots of boats are built with woven roven. Its not just for a budget boat. IMO woven roving when used in combination with chop strand mat is idea for layup on hulls and stringers.

Mat / roving is misunderstood.
Old 04-29-2016, 11:46 AM
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Thanks for the input guys

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