Landscape Contractor / Design Build Maintain

MAR 2018

LC/DBM provides landscape contractors with Educational, Imaginative and Practical information about their business, their employees, their machines and their projects.

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Right This patio and party house incorporate full sized clay pavers from Pine Hall Brick placed on top of an existing concrete foundation. The clay pavers for the patio are arranged in a basket weave pattern, which features bricks laid in pairs in a checkerboard arrange- ment. These 4"x8"x2.22" thick pavers are wire cut to have a square edge. According to a study conducted by the Bishop Materials Laboratory at Clemson University, when submerged in cold water for 24 hours, these pavers absorbed an average of 5% of the water. The study also found that they are able to withstand an average of 18,247 psi. or dyed if needed, the last process of manufacturing is kilning them. The temperature inside these kilns is usually around 2,000 degrees Fahrenheit, but accord - ing to a study conducted by Ambo University in Ethi- poia, "as the optimum firing temperature [of the kiln] increases, the compression strength of the fired clay bricks increases…" This process is done for standard sized bricks, as well as the various other sizes – of which there are ten, according to, an online reference site with information on construction. Their website provides these ten different sizes: standard, modular, Norman, Roman, jumbo, economy, engineer, king, queen and utility. Each of the sizes is accompanied by a suggestion on the total vertical course, or row, height that an unreinforced structure can be safely built. For example, the site allows that engineer (3-5/8"x2- 13/16"x7-5/8"), king (2-¾"x2-5/8"x9-5/8") and queen (2-¾"x2-¾"x7-5/8") sized bricks be built 5 courses high, or about 16 inches, before reinforce - ments should be put in. In regards to compression strengths, one of the lead - ing authorities on clay bricks, the Brick Industry Asso- ciation (BIA), states "Brick unit compressive strengths range from 1,700 psi to 36,000 psi, with a mean val - ue of over 5,200 psi for molded brick and over 11,300 psi for extruded brick. Brick unit strength is directly related to com - pressive strength of the brick masonry assembly." The BIA also describes two versions of clay brick, solid units and hollow units. They suggest us - ing hollow units for rein- forced brick bearing walls because they have inte - rior cells that can accom- modate vertical reinforce- ment and grout. According to Quikrete, an American building material manufacturing company, solid units are Below The bricks for the stair's treads are laid in a stack bond, which has bricks laying side by side, front to back, without staggering. Their orientation is known as "rowlock," meaning they are on their sides. Bricks laid in the "stretcher" position can be seen in the risers. The bricks for the walkway and the fireplace are laid in a common bond pattern. March 2018 39

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