What is a plate in wood frame construction?

• A. The vertical studs that transfer load to the foundation.
• B. The horizontal beam in the ceiling that ties joists.
• C. The insulating material between studs.
• D. The horizontal lumber that the studs rest on at the bottom and top of framed walls.

Answer: (D)

In wood frame construction, a plate is the horizontal lumber that forms the top and bottom edges of a framed wall. The vertical studs sit on the bottom plate and are nailed to the top plate, which ties the wall together and helps transfer loads from above down to the foundation. The bottom plate anchors to the floor or sill and provides a surface for attaching the wall to the floor, while the top plate provides a continuous surface for attaching ceiling or roof elements and helps keep the wall aligned. This is different from insulating material placed between studs or from a horizontal ceiling beam that ties joists, which serves a different purpose in the framing.