Table 4-5.—Quantities of Material Required for Brick WallsThe following example shows the square footmethod of estimating the number of bricks for a 4-inchwall measuring 8 feet high and 14 feet long.Specifications call for the use of US. standard brickwith a 1/2-inch mortar joint. The brick face with itsmortar joints measures 2 3/4 inches high by 8 1/2inches long. The correct steps to follow are:Step 1. Find the surface area by multiplying theheight 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.per brick.Step 2. Find the number of bricks per square footof wall. In this case, the number of brick is 6. 16/sq ftfor a 4-inch wall.Step 3. Find the area of the brick wall by multiplyingits height by its length. 8 ft x 14 ft = 112 sq ft.Step 4. Then multiply the area of the wall by thenumber of bricks per square foot. In this case, 112 x 6.16or 690 bricks plus 10% waste which equals 760 brick.NOTE: If there are windows, doors, and otheropenings on the wall, you subtract the area of theseopenings from the overall area of the wall to get thenet area. Then in step 4, you multiply the number ofbricks per square foot by the net area.In finding how much mortar is required to buildthis wall, divide the number of bricks by 1,000, thenmultiply the result by the factor given in table 4-5 andallow 20% for waste. See the following formula:760 ÷ 1000 = .76.76 x 11.7 (cf of mortar/1000 brick) = 8.90 cf ofmortar8.90 x 20% (waste) = 10.68 or 10.7 CF of mortarTherefore to construct this wall with U.S. standardbrick with a 1/2-inch mortar joint, you require 760brick and 10.7 CF of mortar.STRUCTURAL CLAY TILEHollow masonry units, made of burned clay orshale, are called variously structural tiles, hollow tiles,structural clay tiles, structural clay hollow tiles, andstructural clay hollow building tiles, but they are mostcommonly called building tile. In building tilemanufacture, plastic clay is pugged through a die, andthe shape that emerges is cut off into units. The unitsare then burned much as bricks are burned.The apertures in a building tile, which correspondto the cores in a brick or a concrete block, are calledCELLS. The solid sides of a tile are called the SHELL,and the perforated material enclosed by the shell iscalled the WEB. A tile that is laid on one of its shellfaces is called a SIDE-CONSTRUCTION tile; onethat is laid on one of its web faces is called anEND-CONSTRUCTION tile. Figures 4-21 and 4-22Figure 4-21.—Standard shapes of side-construction building tiles.4-17