A sill plate
or sole plate
is the bottom horizontal member of a wall
to which vertical members are attached. Sill plates are usually composed of lumber
. It usually comes in sizes of 2×4, 2×6, 2×8, and 2×10. In the platform framing method
the sill plate is anchored to the foundation
wall. The bottom of the sill plate is kept 6 inches above the finished grade. This is to prevent the sill plate from rotting as the finished grade contains chemicals.
- Canada Mortgage and Housing Corporation (2005). Canadian Wood-Frame House Construction. ISBN 0-660-19535-6