b. Corner. A corner block is used for corners at simple window and door openings.
c. Double Corner or Pier. A double-corner or pier block is used for constructing piers pilasters or
for any other purpose where both ends of the block would be visible.
d. Bull Nose. A bull-nose block serves the same purpose as a corner block, but it is used where
round corners are desired.
e. Jamb. A wood-sash jamb block is used with a stretcher and a corner block around elaborate
window openings. The recess in the block allows room for the various casing members, as in a double-
2-6. Most Common Block. The most common concrete block is the hollow, load-bearing stretcher
block, which is 8 by 8 by 16 inches nominal size, but 7 5/8 by 7 5/8 by 15 5/8 inches actual size. The
heavyweight load-bearing stretcher block weighs from 40 to 50 pounds.
Note: In Figure 2-2, the cores taper toward the top of the block, providing a wider face shell.
Always lay this block with the wider face up to allow for a greater area on which to lay a bed of
Figure 2-2. Hollow load-bearing stretcher block