A treatise on architecture and building construction . -- i best 5 be placed at the bottom, and at tiie^ ax ^. laid nn in alternate conrses o-f S8 MASONRY 25 headers and stretchers. Such work is generally laid with bedsand joints dressed but very little, the rough angles onlybeing knocked off; the stones are set irregularly in the wall,the interstices being filled with spalls and mortar. If betterwork is desired, the joints and beds of the stonework shouldbe hammer-dressed. The walls are frequently pointed withcolored mortar, showing raised joints. 50. Fig, 19 shows a form of rubble mason
A treatise on architecture and building construction . -- i best 5 be placed at the bottom, and at tiie^ ax ^. laid nn in alternate conrses o-f S8 MASONRY 25 headers and stretchers. Such work is generally laid with bedsand joints dressed but very little, the rough angles onlybeing knocked off; the stones are set irregularly in the wall,the interstices being filled with spalls and mortar. If betterwork is desired, the joints and beds of the stonework shouldbe hammer-dressed. The walls are frequently pointed withcolored mortar, showing raised joints. 50. Fig, 19 shows a form of rubble masonry much usedfor country and suburban work. The quoins, or cornerstones a, are hammer-dressed on top and bottom, and may ^\^X\. !.&. : \i Pig. 19. be either cut stone or rock face; the last harmonizes wellwhen there is similarly stone in the V^dy of the the joints should be , as shown at b, andno spalls should show on the face, while the mortar jointsshould not exceed \ inch to f inch in thickness. This makesan effective wall, especially for country churches, lodges,and other small buildings; but the work is expensive, owingto the labor required in dressing the joints, 51, Small boulders and field stones are often used forwalls in rustic buildings. An example is shown in Fig. a wall should be quite thick, and it is well to use abacking of split stone, to better bond together the boulders. 26 MASONRY. 8 52. Fig. 21 shows a rubble wall with brick quoins, orcorners, as shown at a. In this case all the top and bottom
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