Carpentry.
a sill for a building frame composed of a plate resting on the basement wall and a header or joist at the outer edge of the plate.
Cf. box sill .
Carpentry.
a sill for a building frame composed of a plate resting on the basement wall and a header or joist at the outer edge of the plate.
Cf. box sill .
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012