But not because of springback--my 1 1/4" side gussets (two pieces of 3/4" laminated ply) are rock solid, and no way a 1/4 sheet of ply is going to bend them. My problem is how those side gussets SIT as they relate to the side wall, and how they look.
John, there were probably two main reasons I didn't have a problem with this.
First, maybe two layers of 3/4 gusset is actually stronger than three layers of 1/2.
I know this defies conventional laminating strength "theory," but in the case of the hatch gussets, the stress isn't side to side, it's the OTHER way. So maybe 3/4 is stronger in this respect.
Next, my 1/4 skin (red oak ply heavily varnished) bended to my curve without a problem. Granted, this might not be the best MATERIAL to use for the hatch, but I went with it anyway.
Also, yours appears to be 5' wide, so maybe that extra pull of the extra skin contributed to the springback.
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