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
Every insulation has a different R value. It ultimately is determined by which insulation you will be using. Now lets do rough estimate. 4" thick, regular fiberglass mat has R-value of 13. Assuming that plywood has the same to half the insulating value of fiberglass, 1/2" plywood would have 1/8 to 1/16 of R-value of that 4" mat. Roughly R-1.6 to R-0.8
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.
Yes
A half inch thick steel plate, A half inch thick plywood, Brick, Concrete Block
MDF isn't plywood, it's more like thick masonite.It's a composite board that's made of sawdust, paper pulp and glue
That will be fine.
Just use solatube
Most weight training belts are made of thick leather so as to provide the back with maximum support during the lift.
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.
when asking this question you first need to take into account that plywood comes in different thicknesses therefore weight per particualr thickness of sheet plywood will vary-- in my opinion/ without fact and research / a sheet of 1/2 inch plywood may way about 16 lbs. while a 3/4 inch plywood sheet may way 70 lbs.
that depends on the type of plywood 3/4" ranges from about 20.00 to about 50.00 a sheet (cheap flooring to higher end finish plywood and marine grade pressure treated) in my area. . .check around.
It depends on the density of the plywood. This site shows some plywood densities in kg/m^3. Let's say your plywood is 500 kg/m^3 (which is at the low end of the plywood densities isted on that page). Converting the dimensions of the plywood to meters gives the following: height: 4 ft = 4 ft * (12 in/ft) * (2.54 cm/in) * (1m/100cm) = 1.22 m width: 8 ft = 8 ft * (12 in/ft) * (2.54 cm/in) * (1m/100cm) = 2.44 m thickness: 18 mm * (1m/1000mm) = .018 m The volume of the plywood is height * weight * thickness = 1.22 * 2.44 * .018 = .0535 m^3. Weight is density * volume. So, at 500 kg/m^3, the plywood would weigh: 500*.0535 = 26.8 kg. 1 kg is approximately 2.2 pounds, so 26.8 kg is 26.8 kg * (2.2 lb/kg) = 58.9 pounds. If, however for example, your plywood is 700 kg/m^3, it would weigh 40% more, or 82.5 pounds.