Definitions for "Corbels"
A projection, usually of stone but occasionally of brick or iron, built into a wall and projecting from its face as a bracket to support a beam or roof-truss.
Brick or masonry that sticks out beyond the one below it to act as a support for a window, chimney stack, or bracket, or that forms an arch or dome.
A projection, usually found on the jambs that supports the mantelshelf. Corbels are synonymous with Victorian fireplaces but are of classical origin.
Narrow ledges extending from the convection section sidewalls to prevent flue gas from flowing preferentially up the side of the convection section, between the wall and the nearest tubes, thereby bypassing the tube bank.