Which material is commonly abbreviated OSB and used in framing?

• A. Oriented Strand Board
• B. Plywood
• C. Medium Density Fiberboard
• D. Hardboard

Answer: (A)

OSB stands for Oriented Strand Board, an engineered wood panel made from long wood strands laid in cross-oriented layers and bonded with resin. This construction gives the panel strong stiffness and good load-bearing capacity, which is why it’s widely used as structural sheathing in walls and roofs during framing. It’s also cost-effective and available in large sheets, which suits framing work well. The other options describe different panels—Plywood is a layered veneer panel, MDF is a dense fiberboard used mainly for interior applications like cabinetry, and Hardboard is a dense fiberboard used for interior panels—so they aren’t the material abbreviated as OSB or typically used for framing in the same way.