Dictionary.com
definitions
  • synonyms

box sill

See more synonyms on Thesaurus.com
noun Carpentry.
  1. a sill for a building frame, composed of a plate resting on the basement wall and a joist or header at the outer edge of the plate, as well as a soleplate for the studs resting either directly on the joists or on the rough flooring.
Compare L sill.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018