Building the "Swiss Army Knife" of Small Boats...Wood Duck Double #29: Spray Deck Frames

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Blog entry by DustyMark posted 07-18-2020 03:38 AM 675 reads 0 times favorited 0 comments Add to Favorites Watch
« Part 28: Apply Keel Rub Strip Part 29 of Building the "Swiss Army Knife" of Small Boats...Wood Duck Double series Part 30: Solo Spray Deck and Coaming »

Designing at the Bench
I’ve been mulling over the design of the spray decks in my head for some time and today I began to construct them with 1/4” Baltic birch plywood. The beauty of this wood is that the glues are outdoor capable. I don’t use it below the waterline, but I’ve used it for years successfully above the waterline. I glue parts together with polyurethane construction adhesive and finish them with marine varnish. This is enough protection for these type of accessories that get wet, but then are dried.

I had a fiberglass cockpit cover from my triple kayak that I traced for the outside shape of the new coaming rings. I then came in 1 1/2” to form the inside edge of the coamings. This photo is of the tracing of that inside edge after I cut it. Here I’m going back out 3/4” and this became my master template for the coaming ring spacers.

This is a photo of the coaming ring that will fit our current spray skirts well.

View of the tandem spray deck frames. Each frame will be clamped/bolted into position in four spots. I’ll sew a large cockpit cover out of vinyl that will attach around the perimeter of the cockpit with 1/4” bungee. The edge around the coaming and the deck frame will receive vinyl cement and the coaming ring will sandwich the vinyl cover between the deck frame. This should keep water from seeping between the layers. I chose to make these spray deck frames from separate pieces of plywood so that the entire spray deck could be folded and stored in the back of my truck.

Close-up of bow spray deck frame.

Close-up of stern spray deck frame.

Cut the rest of the coaming spacers and laminate them to the coaming ring.

-- Mark, Minnesota

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