







A horizontal, structural member of a building near ground level on a foundation or pilings or lying on the ground in earth-fast construction and bearing the upright portion of a frame. Also called a ground plate, groundsill, sole, sole-plate, mudsill. An interrupted sill fits between posts instead of being below and supporting the posts in timber framing.

El geólogo estudió los umbrales en las paredes del cañón, observando cómo las capas horizontales de roca ígnea estaban intercaladas entre rocas sedimentarias más antiguas.




