Figure 7-38.-Concrete block.
uses. Figure 7-39 shows only a few of the wall
patterns that can be developed using various
pattern bonds and block sizes. Commercial publi-
cations from the Portland Cement Association
show many more. Figure 7-40 shows some of
the styles of SCREEN BLOCKS (blocks with
patterned holes). This type of block is used to
material that forms the partitions between the
cores is called the WEB, and the holes between
the webs are called CORES. Each of the long sides
of a block is called a FACE SHELL, and each
of the recessed ends is called an END SHELL.
The vertical ends of the face shells, on either side
of the end shells, are called the EDGES.
The large number of shapes and sizes of
concrete blocks lend themselves to a great many
Figure 7-40.-Screen block designs.
Figure 7-39.-Wall patterns.