by KCStudly » Mon Sep 18, 2023 9:38 am
I did 2x2 cedar around the perimeter of my floor frame with 1x2 intermediates. This gave more meat to attach walls. (I also had a centerline row of blocking, but that was more just to back up seams because my skin panels were made up of smaller pieces just butt joined, not scarfed.) Even still, at 1-1/2 thick plus 2x5mm, 64 wide and something like 9-1/2ft long my floor weighs about the same as an equivalent sheet of 3/4 ply (single thickness), but is extremely more rigid. I could pick up one corner pivoting on the far diagonal corner and not perceive any sag or flex. Very rigid. Don't forget, your fwd bulkhead and side walls will hold the floor up. The box is the deepest "beam" structure in your build, and has more strength in it than a 2x4 placed under the leading edge of your floor. Build nice strong "composite" (well glued) walls and attach them well (construction adhesive and screws) to your floor.
KC
My Build:
The Poet Creek Express Hybrid Foamie
Poet Creek Or Bust
Engineering the TLAR way - "That Looks About Right"
TnTTT ORIGINAL 200A LANTERN CLUB = "The 200A Gang"Green Lantern Corpsmen