716— Drilled Pile Foundations

718.1 Description

1 Provide and install brick, rubble, or concrete block masonry .

718.2 Materials

718.2.1 Clay or Shale Brick

1 Provide c lay or shale brick used in the construction of manholes, catch basins, and other drainage related structures conforming to ASTM C32, Grade MM. Ensure that clay or shale brick used in the construction of buildings, retaining walls, steps, and other above ground structures conform to ASTM C62, Grade SW. Back -up brick for buildings above ground may be Grade MW.

718.2.2 Concrete Brick

1 Furnish concrete brick and similar solid units conforming to ASTM C55.

718.2.3 Stone Rubble

1 Provide s tone for rubble masonry of an approved quality, sound, durable, and free from seams, cracks, and other structural defects or imperfections tending to reduce its resistance to weathering. Ensure that the stone rubble is free from rounded, worn, or weathere d surfaces. 2 In general, provide stones with thicknesses of not less than 6 in., a width of not less than 1½ times their thickness, and a length of not less than 1½ times their width. 3 In walls 18 in. or less thick, provide stone for headers of sufficient length to extend entirely through the wall.

718.2.4 Concrete Block

1 For all construction other than the construction of drainage structures, furnish concrete block that are hollow or solid load- bearing concrete masonry units conforming to ASTM C90. 2 For all construction of drainage structures, furnish concrete block that are solid load-bearing concrete masonry units conforming to ASTM C139.

718.2.5 Mortar

718.2.5 1 Portland Cement

1 Provide Portland cement that complies with Subsection 701.2.1.