Which term identifies large-dimension lumber used in heavy timber construction?

• A. Engineered lumber
• B. Heavy timber
• C. Dimensional lumber
• D. Glulam

Answer: (B)

The term identifies large-dimension solid wood members used in heavy timber construction. Heavy timber refers to substantial, solid timbers used as beams and columns, emphasizing size and the traditional construction method rather than manufactured products. This makes it distinct from other options: dimensional lumber covers standard small sizes used in light framing, engineered lumber refers to wood products created by bonding or engineering wood fibers (like LVL or I-joists), and glulam is a specific glued-laminated engineered beam. So when you think of large, solid timbers used in the heavy timber style, the correct term is heavy timber.