The first rule of plywood is that the grain of outer layers run in the same direction, so the sheet is structurally balanced.
Breaking this rule, I’m wondering if there are any instances at all in the woodworking world where only two sheets are laminated perpendicular to one another?
As a concept, is it downright crazy; destined to failure, or just bringing with it a slightly larger tendency for the finished laminate to warp?
In this particular instance, I’m thinking about laminating two pieces of 7mm thick softwood perpendicular to one another, to make a circular part around 200mm diameter. Although I’ve wondered about this point numerous times in the past.
In addition: would laminating two 7mm pieces with the grain running in the same direction have any advantages over a single 14mm thick piece, or would the properties be identical? Or how about a 45-degree angle between the grains?!
Thanks to anyone for taking my musings seriously!
EDIT: the above example wasn’t a very good one. Let’s say instead I want a thin sheet of say 5mm thickness, where a single ply would be too weak.