1 Algorithm based on impact on opinions over time - and Wikipedia. 2  Top ten most significant in history puts Jesus in the number one spot.  The list also includes Muhammad, Lincoln, Hitler and Shakespeare.
Plies vary in thickness from 1.4 mm to 4.3 mm. The number of plies depends on the thickness and grade of the sheet but at least three are required as the minimum odd number of plies. Roofing can use the thinner 5/8 (15 mm) plywood.
Standard veneer-core plywood 3/4 in. thick consists of seven plies: two outer veneers, plus five hardwood or softwood plies between them. A) MDF core is heavy and flat. Plywood with a core of medium-density fiberboard offers a smooth outer surface. It is about 25% heavier than veneer-core plywood.