1) Breast beam 
beam supporting front of a building; bressummer
• (n.) A summer or girder extending across a building flush with, and supporting, the upper part of a front or external wall; a long lintel; a girder; -- used principally above shop windows.
Breast'sum`mer noun (Architecture) A summer or girder extending across a building flush with, and supporting, the upper part of a front or external wall; a long lintel; a girder; -- used principally above shop windows. [ Written also brestsummer and bressummer .]
In architecture a breastsummer (brestsummer, bressummer or bressumer) is a summer or girder extending across a building flush with, and supporting, the upper part of a front or external wall. They are used principally above shop windows. A breastsummer is distinguished from a lintel by its bearing the whole superstructure of wall etc, instead of on...
a horizontal beam supporting an exterior wall over an opening, as a shop window. Also called