Why use plywood?
The fact that plywood consists of fibers ("the grain of the wood") that are laminated in successive layers orthogonal to one another (i.e., at a 90 degree angle) gives it tremendous structural strength - much higher than a wood product where all of the fibers are aligned in parallel (as in ordinary wood).
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Plywood can be used for building materials eg. lofts walls and decorative wood art.
Plywood is good for basic domestic construction projects --shelves, tables, games, etc.... it is basically "slices" of woodglued together in a sandwich, usually with each laye…r going againstthe grain of the one beneath it. The combination creates a verystrong piece of wood, better than particle board, which isessentially pressed and glued together wood chips.
Archeologists have found traces of laminated wood in Egyptian tombs of pharaohs. The Chinese used shaved wood glued together for furniture a thousand years ago. Wood with the …general constituents of plywood were used in 17th century France and England.
Plywood is primarily used where you need either stability or strength. Plywood is called that because it is made up by gluing separate layers (each called a ply) together into… a solid sheet. Each successive ply in a stack is at right angles to the one below it. As a result, plywood does not change dimension (except perhaps for a tiny amount of thickness) as it undergoes humidity changes, while regular solid wood does. If you have a single panel door that is 16" wide, with the grain running vertically, as the humidity in the area increases, the door will grow in width, perhaps as much as a quarter of an inch. When the humidity drops, the board will shrink back to the original size. This happens very slowly, and is slowed even more by various finishes. However, it will not grow (or not nearly as much) vertically. When making furniture, it is important to take this into account so you don't have a glue joint with wood grain at right angles, or the joint will eventually fail. Plywood, because of the cross ply construction, does not change size with humidity. In construction, it is important to have this stability. Also, a plywood panel is typically stronger than the same sized panel of the same type of wood. Even minor imperfectons (knot holes, etc) don't dramatically affect the strength of a plywood panel, but certainly would in a solid wood panel. Of course, you need to pay attention to the type of plywood. Interior grades don't have waterproof glue. Exterior grades have a more water resistant glue and work in most cases, but if you really want to resist water, you would want marine grades of plywood. No grade will last all that long unless it is protected (covered with siding, roofing or painted).
Although Plywood has many advantages it also has some disadvantages. One disadvantage is because of the layering effect in plywood, it makes it very absorbent to water. This m…akes it prone to water damage if it is left in the rain for too long.
One of the earliest records of veneering, which is the basis of plywood, is a pictorial mural unearthed by archaeologists in Egypt. Early Egyptians also built furniture with p…lywood. Egyptian mummies were entombed in cases constructed of plywood and veneer. Some two thousand years ago, Cleopatra presented Julius Caesar with a veneered table richly decorated with inlays. The Chinese, Greeks, and Romans were also early users of veneer and plywood.. http://www.hpva.org/products/history.asp
Cheaper than regular wood, looks just as good, relatively strong, and comes in larger pieces.
It would cost more & is not attractive.
It shouldn't be. When it gets wet, it will start to swell, separate, and come apart.
yes but i would not do it if i was you but if takes mld of wood if it has mold
Less expensive than solid wood, lighter weight to work with, lighter weight finished project, can be matched with other wood, easier to cut than some solid woods
it is used for building stuff.
coz its strong
If you live in an area that does not get snow, or very little snow, you can use 1/2 inch thickness plywood for a roof. If you live in a snowy area, then you should use about 5…/8 thickness.