Table 4-5.Quantities of Material Required for Brick Walls
The following example shows the square foot
method of estimating the number of bricks for a 4-inch
wall measuring 8 feet high and 14 feet long.
Specifications call for the use of US. standard brick
with a 1/2-inch mortar joint. The brick face with its
mortar joints measures 2 3/4 inches high by 8 1/2
inches long. The correct steps to follow are:
Step 1. Find the surface area by multiplying the
height and the length of a brick (include mortar joint).
In this case, 2 3/4" x 8 1/2= 2.75 x 8.50= 23.38 sq in.
Step 2. Find the number of bricks per square foot
of wall. In this case, the number of brick is 6. 16/sq ft
for a 4-inch wall.
Step 3. Find the area of the brick wall by multiplying
its height by its length. 8 ft x 14 ft = 112 sq ft.
Step 4. Then multiply the area of the wall by the
number of bricks per square foot. In this case, 112 x 6.16
or 690 bricks plus 10% waste which equals 760 brick.
NOTE: If there are windows, doors, and other
openings on the wall, you subtract the area of these
openings from the overall area of the wall to get the
net area. Then in step 4, you multiply the number of
bricks per square foot by the net area.
In finding how much mortar is required to build
this wall, divide the number of bricks by 1,000, then
multiply the result by the factor given in table 4-5 and
allow 20% for waste. See the following formula:
760 ÷ 1000 = .76
.76 x 11.7 (cf of mortar/1000 brick) = 8.90 cf of
8.90 x 20% (waste) = 10.68 or 10.7 CF of mortar
Therefore to construct this wall with U.S. standard
brick with a 1/2-inch mortar joint, you require 760
brick and 10.7 CF of mortar.
STRUCTURAL CLAY TILE
Hollow masonry units, made of burned clay or
shale, are called variously structural tiles, hollow tiles,
structural clay tiles, structural clay hollow tiles, and
structural clay hollow building tiles, but they are most
commonly called building tile. In building tile
manufacture, plastic clay is pugged through a die, and
the shape that emerges is cut off into units. The units
are then burned much as bricks are burned.
The apertures in a building tile, which correspond
to the cores in a brick or a concrete block, are called
CELLS. The solid sides of a tile are called the SHELL,
and the perforated material enclosed by the shell is
called the WEB. A tile that is laid on one of its shell
faces is called a SIDE-CONSTRUCTION tile; one
that is laid on one of its web faces is called an
END-CONSTRUCTION tile. Figures 4-21 and 4-22
Figure 4-21.Standard shapes of side-construction building tiles.