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Old 01-31-2021, 10:04 PM
FishStretcher FishStretcher is offline
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Join Date: Dec 2010
Location: Greater Boston
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I hope that you have a lot of glass connecting that pair of sawn through stringers/ through transom knees? I couldn't tell from pictures. Those box stringers are some of the primary load carrying members in the hull, and I didn't see that reconnected. I think I saw foam there.


Maybe I missed it? I saw a picture of the tank installation and it looks like the through-transom knees aren't connected to the box longitudinal stringers?


Without this connection the bending load exits the knees near the transom, goes through the hull and back to the stringers forward, peel failing the tabbing and bending the hull from slamming loads. If the glass is there, but isn't thick enough, it will progressively fail.



Apologies if this has already been addressed.


I do like the all composite bracket, in that it should never rot.







Quote:
Originally Posted by No grave but the Seacraft View Post
I've not built a bracket before but I do have some experience with fiberglass. I built three fiberglass over plywood boats before starting this project. I don't know that I would try building a bracket and glassing it on which is why I extended the stringers through the transom. This way the stresses are spread out from the hull through the transom and to the motor mount. That being said fiberglass is stronger than you think it would be especially epoxy. Either way I added more than I think I needed. As far as cost it took 4 sheets of 3/4" coosa with some to spare. Maybe 5-6 yards of 50" 1700 cloth and 20 yards of 12" 1700 tape and roughly 6 gallons of resin. All total its been about 35 hours of labor and $1800 in materials. Ordering an aluminum bracket might be cheaper and definitely easier but i prefer to do things myself.
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