Bressummer

• In the outward part of the building, and the middle floors into which the girders are framed. In the inner parts of a building, such beams are called "summers". It is part of the timber frame construction in the over-hanging upper story in jettying.
• "Horizontal beam over a fireplace opening, or set forward from the lower part of a building to support a jettied wall, a jetty bressummer".
• "...usually the sill of the upper wall above a jetty; otherwise any beam spanning an opening and supporting a wall above." also called a "jetty sill".
• Breastsummer is a beam in a wall which carries the load over a large opening derived from breast being in the front, mid-level and summer: "A horizontal, bearing beam in a building; spec. the main beam supporting the girders or joists of a floor...".
• "a main piece of timber that supports a building, an architrave between two pillars"
• "Breast-Summer, an architectural term for a beam employed like a lintel to support the front of a building, is a corruption of bressumer..."
• "Summer beam: A large timber spanning a room and supporting smaller floor joists on both sides."
• "Summer beam. Heavy main horizontal beam, anchored in gable foundation walls, that supports forebay beams and barn frame above."