Timber milled and cut to relatively small dimensions,
generally 1 1/4, 5/8, or 1/2 inch thick, as much as 9 inches wide, and from
6 to 12 feet in length. Strips of deal were prescribed for forming the horizontal
and diagonal surface markers in profiles used to guide the construction of
parapets and other earth structures.
Timber milled and cut to relatively small dimensions,
generally 1 1/4, 5/8, or 1/2 inch thick, as much as 9 inches wide, and from
6 to 12 feet in length. Strips of deal were prescribed for forming the horizontal
and diagonal surface markers in profiles used to guide the construction of
parapets and other earth structures.
