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.
How heavy the plywood is. The weight of a plywood sheet will proportionally increase with increasing in width, length and thickness. 3/4 thick plywood will weigh about 2.5 pounds per square foot (PSF). And the whole 4â x 8â sheet will be approximately 84 lb. or 38 kilograms.