monkitoucher
Canoe Curious
Yes, this is exactly how the outer rails are milled out. There is a rabbit on the inside that clears the plank and canvas. The top fits tight to the rib tips. when installed it will clamp the canvas and hold the canvas tacks from backing out. The profile is a bit more complex than cutting a 90* rabbit in the back of 3/4" stock. You may need to ask around for what the profile should be. I can take pics of my original rail profile. But that is off of a 1922 OTCA.What I meant was that you have the inside rail, then ribs, then plank, then canvas and then the outer rail. Looking down from above between the rails you would be able to see the rib tops, plank top and the top edge of the canvas.
The only way that I could fathom not seeing the canvas would be to cut it back 1/4" or 3/8" and then rabbit out the bottom of the outside rail the thickness of the canvas and then the rail would act like a cap over the canvas.