Which of the following are common decking materials?

• A. OSB (Oriented Strand Board), Plywood, Sheathing (1x6)
• B. Concrete, Glass, Steel
• C. OSB, Plywood, Cardboard
• D. Plywood, Metal, Tar paper

Answer: (A)

Common decking materials are wood-based products used to cover the floor framing and create the deck surface. OSB and plywood are the standard engineered decking panels, and 1x6 boards are a common solid decking option used as the deck surface or as deck-related sheathing. In vertical ventilation, recognizing these materials matters because they determine how the deck will burn, how it will break apart when cut or removed, and how much weight you’ll be lifting to access the fire below.

Other materials listed aren’t typical decking: concrete, glass, and steel are structural or finish materials used in other contexts, not as deck surfaces; cardboard isn’t used for decking; tar paper is roofing underlayment, not a deck surface.