In wood floor framing, which is the lowest member that anchors to the foundation wall?

In wood floor framing, which is the lowest member that anchors to the foundation wall?

• A. Sill
• B. Joist
• C. Lintel
• D. Header

Answer: (A)

The base of wood floor framing is the sill (often called the mudsill). This is a treated timber laid directly on top of the foundation and anchored to the foundation wall with bolts or straps. It provides the stable footing for the rest of the floor framing, and the floor joists bear on it. The other items serve different roles: a lintel spans openings in walls to carry loads, a header sits above openings as part of the wall framing, and joists run between supports above the sill. So the lowest member that anchors to the foundation wall is the sill.

The base of wood floor framing is the sill (often called the mudsill). This is a treated timber laid directly on top of the foundation and anchored to the foundation wall with bolts or straps. It provides the stable footing for the rest of the floor framing, and the floor joists bear on it. The other items serve different roles: a lintel spans openings in walls to carry loads, a header sits above openings as part of the wall framing, and joists run between supports above the sill. So the lowest member that anchors to the foundation wall is the sill.