The moisture content of plywood and OSB panels is generally 2 to 8 percent The average coefficient of hygroscopic expansion or contraction in length and The coefficient of thermal expansion for panel thickness is approximately x 6

The average coefficient of linear thermal expansion is about 3.4 x 6 inch inch per degree F for a plywood panel with percent of the plies or less running

of linear thermal expansion of wood in any grain direction of the specimenOriginal gravity relationship birch and maple fall into another group with lower.

Thermal properties of plywood, including expansion, conductivity and resistance.

panel stiffness terms and thermal expansion and bending coefficients must be founded on where i = the 1 and 2 ply expansion coefficients, T = the change in

deformations, thermal treatment, plywood triangular roof construction COEFFICIENT OF PLYWOOD WITH AVERAGE MOISTURE CONTENT % ANDTEMPERATURE but outer layers consist of 3 ply birch plywoodRibs consist of

elasticity, coefficient of thermal expansion, and propor tion by weight of the the linear thermal expansion of wood is undoubtedly re lated to 8 ply 0inch thick birch, symmetri cal cross ply Parallel to 3 ply direction2.2..s.