Steve Sanford
Well-known member
All~
I finally got around to formally drawing up my plans for the plywood used in my Gunning Boxes; I revised them in 2017.
Compared with my original measurements, the box is just a few inches wider at the bow. This gives a bit more shoulder room AND it makes bending the framing "longitudinals" - the chine logs and outwales - significantly easier. Each box still requires just a single sheet of 1/4-inch plywood.
I recommend AC plywood. I just bought a piece of marine plywood for another project. It is twice the price but still has some interior voids. Marine is supposed to have 2 good faces and NO voids. As you'll see in my note below, I put the A side in and the C side out. Any blemishes in the C side get filled and faired with either thickened epoxy or Bondo before 'glassing.
I will put together a Materials List soon. And, I hope I can find the time to update my website posts with this new information.
Here's how I array the 3 pieces on a full sheet of plywood:
After drawing grid lines across the plywood every 12 inches, I mark the half-breadths for the bottom. I set the blade on my circular saw fairly shallow (half-way) and cut the bottom first. Then I stack the 2 sides before sawing them.
The forward end of each side is detailed at a larger scale. Grid lines are drawn every 6 inches for the first 30 inches aft of the bow.
Otherwise, the instructions for building these boxes remain unchanged - as far as I recall. I will scrutinize the text and revise wherever needed.
https://stevenjaysanford.com/sanford-gunning-box/
All the best,
SJS
I finally got around to formally drawing up my plans for the plywood used in my Gunning Boxes; I revised them in 2017.
Compared with my original measurements, the box is just a few inches wider at the bow. This gives a bit more shoulder room AND it makes bending the framing "longitudinals" - the chine logs and outwales - significantly easier. Each box still requires just a single sheet of 1/4-inch plywood.
I recommend AC plywood. I just bought a piece of marine plywood for another project. It is twice the price but still has some interior voids. Marine is supposed to have 2 good faces and NO voids. As you'll see in my note below, I put the A side in and the C side out. Any blemishes in the C side get filled and faired with either thickened epoxy or Bondo before 'glassing.
I will put together a Materials List soon. And, I hope I can find the time to update my website posts with this new information.
Here's how I array the 3 pieces on a full sheet of plywood:
After drawing grid lines across the plywood every 12 inches, I mark the half-breadths for the bottom. I set the blade on my circular saw fairly shallow (half-way) and cut the bottom first. Then I stack the 2 sides before sawing them.
The forward end of each side is detailed at a larger scale. Grid lines are drawn every 6 inches for the first 30 inches aft of the bow.
Otherwise, the instructions for building these boxes remain unchanged - as far as I recall. I will scrutinize the text and revise wherever needed.
https://stevenjaysanford.com/sanford-gunning-box/
All the best,
SJS