The answer will depend on what it is filled with - air or lead, for example.
Yes
No, not safe; if supported on each end it is likely to break
43.50
it is 336
14.5 pounds
Yes, it will easily hold that weight. Most flooring is that thick and it holds people.
I need the thickness dimension of 12 ply plywood for floor.
The subfloor plywood typically used in construction projects is around 3/4 inch thick.
For optimal support and durability, the plywood under a mattress should be at least 3/4 inch thick.
The thinnest plywood available on the market is typically around 1/8 inch thick.
Yes
For a subfloor, typically 3/4 inch thick plywood is recommended for stability and durability.
20-25 pounds per sheet, per 1/4" of thickness. In other words, about 25 pounds for a sheet of 1/4, about 50 pounds for a sheet of 1/2.
The thickest plywood sheet available for purchase is typically 1 1/8 inches thick.
A half inch thick steel plate, A half inch thick plywood, Brick, Concrete Block
It depends what the "ply" value is ... the number of layers glued together. For instance, 1/2" plywood is going to be lighter then 3/4" plywood. A common rule of thumb is a 4x8 foot sheet of 1/4" fir plywood weighs 25 pounds. There are 32 square feet in a sheet, so a square foot of 1/4" fir plywood weighs about 0.78 pounds. Since 1/2" is twice as thick as 1/4", 1/2" fir plywood weighs twice as much, or 1.56 lbs, and 3/4" three times as much, or about 2.34 lbs. Fir plywood is common, but other species are available. Weight varies considerably between species of wood, so be aware the weight of plywood of different species can be different.
The best plywood to use for an attic floor is typically 3/4 inch thick, tongue-and-groove plywood. This type of plywood is strong and durable, providing a sturdy surface for walking and storing items in the attic.