Unbalanced Plywood

[natelox]

I need to know where unbalanced plywood would be used in a building. I cannot find any information on it, anywhere. Not at canply.org, apawood.org, cwc.ca, Architectural Graphic Standards or a specification library.

What is unbalanced plywood? Normal plywood is assembled by adhering thin veneers of wood together with grains perpendicular to each other. If I say that a grain in one direction = x, and a grain perpendicular to that is y, for standard 5 ply plywood you would get: xyxyx. Unbalanced plywood looks like this: xyxyyx (6 ply).

The only possible explanation I can think of is that it would be easier to bend. Any and all assistance appreciated.