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Bond (Masonry a stone or brick)

in masonry, a stone or brick which is laid with its length across a wall, or extends through the facing course into that behind, so as to bind the facing to the backing. Such stones are known also as binders, bond stone, binding stones, through stones, perpent stones and headers. In brick laying, a bond is a particular mode of disposing bricks in a wall so as to tie and break joint. The English bond has courses of headers alternating with courses of stretchers. In the Flemish bond each course has stretchers and headers alternating.