A 1/2" sheet of oriented strand board weighs about 52-53 pounds and a
3/4" sheet weighs about 78-80 pounds.
It appears that it is not possible to be more precise because the
density of the material is not standardized and can vary depending on
the moisture content.
osb 4x8 sheet is 95lbs.
Oriented strand board (OSB) was introduced during the 1980s.
OSB stands for oriented strand board. It is made of wood strands and waterproof adhesives. The strength of OSB board is equal to that of plywood.
Used instead of plywood. Oriented Strand Board
If you are taking the test for the forclosure bank inspections the answer is Oriented Strand Board
hardboard, particleboard, insulation board, medium-density fiberboard (MDF), waferboard, oriented strand board (OSB), and other panelized products made from wood chips and particles.
Oriented Strand Board Ordinis Sancti Benedicti (Order of St. Benedict) Order of Saint Benedict
Oriented Strand Board (OSB) is used in exterior applications where it is protected from weather by metal, siding, or roofing. Never as an unprotected surface.
Oriented strand board is manufactured in wide mats from cross-oriented layers of thin, rectangular wooden strips compressed and bonded together with wax and resin adhesives (95% wood, 5% wax and resin[citation needed]).
If you are referring to OSB (oriented strand board) and partial board then Yes they are good for the environment. These types of woods don't require old growth trees to manufacturer. They use quick growing, easily replenishable sapling and small trees in their production.
OSB (oriented strand board) comes standard in 4' x 8' sheets, but you can order it in 10' and 12' lengths. You'll have to contact a supplier that caters to the commercial construction contractors. You're not going to find it in chain stores like Homie or Lowe's The above is accurate but OSB is available from some manufacturers in some markets in other lengths up to 145 1/8"
Oriented Strand Board Used in place of plywood for roofs and sidewalls. Strips and chips of wood are randomly formed into a sheet with glue and pressed into a sheet. Because the strips are going in different directions and across each other it give the finished sheet it's strength.
They are both engineered wood products, constructed using similar methods. The main difference is price. OSB (oriented-strand board) is generally cheaper and has a more uniform composition and appearance. Even though they are both made of layers of smaller pieces of wood glued together, the small pieces that make up a sheet of plywood are still quite visible in the finished product, unllike OSB. OSB is also more commonly used nowadays in residential construction than plywood for cost reasons.