what is a sole plate
The sole plate, also sometimes referred to as the sill plate, the mud sill, or the base plate, is the main supporting beam of a wall in the construction industry.Typically, these are the first piece of wood that is in contact with the masonry of the basement or foundation.t is common for modern buildings to bolt or lag the sole plate into the masonry below it. In the past, however, construction of these plates that were not bolted to the masonry foundation were considered to be acceptable.