Wood fiber is used more efficiently in OSB . OSB is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood.This is one of the reasons osb is used for webs of wooden I-joists. However, nail-holding ability controls performance in shear wall applications.
OSB is now used for about 70 percent of all floor, wall and roof sheathing. Most people rate plywood and oriented strand board (OSB) equal in strength and durability.