A knee bulkhead is a standing wall
A knee bulkhead is a wall between floor and a slanted roof: Knee bulkheads are placed mainly in attics to cover the point between the floor and the roof. Often the empty space behind the knee shot is used as storage space. Besides the usefulness of the room and the more beautiful finish, a knee shot can also serve as support for the roof.
Do it yourself with Roger: Beveled wall finish [YouTube] JpK2vMXM7Kc [/youtube]