A treatise on architecture and building construction . Fig. 25. 30 MASONRY. 8 or chamfer, at the joints; d, the plain, rubbed, or tooledstones forming the face of the wall; c, the rustic bandcourse, having a 1^-inch chamfer cut on it, so as to projectbeyond the quoins; and d, the stone or brick backing. Thismethod of construction is very expensive, owing to thegreat amount of dressing required. 5S, Broken Aslilar.—It is often found that stones ofuniform size cannot be cheaply obtained, in which case,irregular sizes luay be used, forming what is termed brokenashlar; by careful workmanship, a co
A treatise on architecture and building construction . Fig. 25. 30 MASONRY. 8 or chamfer, at the joints; d, the plain, rubbed, or tooledstones forming the face of the wall; c, the rustic bandcourse, having a 1^-inch chamfer cut on it, so as to projectbeyond the quoins; and d, the stone or brick backing. Thismethod of construction is very expensive, owing to thegreat amount of dressing required. 5S, Broken Aslilar.—It is often found that stones ofuniform size cannot be cheaply obtained, in which case,irregular sizes luay be used, forming what is termed brokenashlar; by careful workmanship, a coursed effect may beproduced with nearly continuous horizontal joints. Prob-ably the great majority of stone buildings consists of thisclass of masonry. It generally takes a longer time to buildbroken ashlar than coursed work, and hence it is morecostly, owing to the increased amount of labor required to. ii>*^ Fig. 26. fit and lay the different sizes of stone. This kind of ashlar,when properly executed, presents a pleasing is generally laid up as rock-faced work, but in some Cases,it is tooled or hammer-dressed. It should have no horizon-tal joints more than 4 feet long, and several sizes of stoneshould be used. Fig. 26 shows an ordinary broken ashlarwall, 2 feet thick, the sizes of stone used being 4, 6, 8, 10, 12, 8 MASONRY. 31 and 14 inches in height; a shows the quoins; b^ the differentsizes of ashlar; and c, the stone or brick backing. Fig. 27 represents the same kind of a wall, using only
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
