Posted by: LeeG on Mar-25-13 9:56 PM (EST)
2) Kevlar is better than fiberglass for this application;
I'd like to hear the reasoning, hand layup with glass is easier for a beginner. If you use Kevlar put peel ply over it.
5) Put down one or two layer kevlar/fiberglass patch(es) before not after epoxying down the strap (this is counterintuitive to me and I am still processing it);
The layers of cloth under the strap help spread the load out so there's less bending of the underlying laminate where the strap is attached.
The issue with the seat and footbrace attachments is that the forces are primarily shear and not pulling. I could see a well epoxied 1" webbing strap pulling the thin interior laminate away from the foam with repeated tugs but a few layers of cloth would spread the stress over a larger area.
I'd be inclined to use 3"x5" oval glass patches of one or two layers of 6oz glass cloth oriented vertically at the edge of the floor core where the hull is doubled material and very stiff. Webbing loop glued down like an upside down T.
Cartop Kayak Carriers
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