223. There is also a method of constructing hollow brick walls with a 4-inch outer and inner facing, connected by solid brick withes (as these short cross brick partitions are called). The air space may be either 4, 8, or 12 inches, according to the height and character of the building. Fig. 89 shows an example of this mode of construction, being a hollow wall 20 inches thick and 12 inches between inside of brickwork. At a is shown the outer brick wall, while b shows the inner wall; the withes, or connecting walls, are shown at c, c. The bond is shown in two different ways; at d, the bricks are cut as shown on Fig. 86, and at e, the bond is made by wire bonders as shown in Fig. 82; f shows the manner of placing the floorbeams on the inner wall, and g, a 2" X 1/4" X 20" anchor, turned up at the end, to bond the floorbeam into the joint of the cross-wall or withe.

Hollow Walls With Brick Withe Bonds 91

Fig. 89.

If such a wall is made of good quality of brick, such as are made in most of the New England and Middle states, and with perfect workmanship, it ought to have sufficient strength for an ordinary three or four story building, and would certainly conduct less heat and moisture from and into a building than a solid wall of one-half more brick. When the brick and workmanship are both equally poor - as is found in some parts of the country - walls built in this way should not be used in the construction of any buildings higher than two stories.