Check Local Availability
check your local store, for in store pickup
check your local store, for in store pickup
check your local store, for in store pickup
Throughout the USA building codes vary and new technology has changed with the times as much as green technology taking over in many facets. Flooring plywood remains fairly consistent though, 5/8″ sturdy floor tongue and groove plywood has been manufactured and used predominately with an adhesive and fasteners that create a silent floor sound covering used in second story home construction as well as mezzanine commercial truss construction. Standard 4×8 sheeting cdx, c grade ply laminated over and sandwiched between typically 5 ply fabrication with an exterior glue, [x is for exterior]. 3/4″ plywood can be used as well because structural engineers give tables noting minimum requirements. 
Often flooring plywood for an exterior deck for instance, that has a coated surface, could call for 1-1/8″ tongue and groove plywood, that is essentially unbendable and has superior strength and sound resonating abilities when applicable. Budgeting your costs and understanding the options on any home improvement project, will get you further down the planning and orchestrating road faster and more efficiently.