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, � <br /> 04220 Concrete Block <br /> A. Construct masonry foundation walls as shown on the Drawings and specified herein. <br /> B. Masonry Materials: <br /> 1. Concrete Block: ASTM C 33; standard weight; eight (8") high x thickness(es) shown on the Drawings. <br /> 2. Mortar: <br /> a. Exterior, above grade:........................Type S <br /> b. Exterior/interior, at or below grade:.....Type M <br /> c. Interior: ..............................................Type S. <br /> 3. Reinforcing/Ties: <br /> a. Vertical: Reinforcing bars shown on the Drawings and specified herein <br /> b. Horizontal: ASTM A 82; truss-type; standard weight; cold-drawn steel wire; width equal to two inches <br /> (2") less than wall thickness. <br /> 4. Grout: Minimum 3,000 psi concrete. <br /> 5. Steel Lintels: ASTM A 36; structural steel; shapes and sizes shown on the Drawings. <br /> 6. Anchor Bolts: 1/2 inch diameter x minimum ten inches (10") long, with two inch (2") hook. <br /> 7. Flashing: Plastic; minimum 30 mils thick; membrane flashing: <br /> a. Adhesive/Mastic: ASTM D 4586; bituminous; plastic; cold-setting cement as recommended and <br /> manufactured by the plastic flashing manufacturer. <br /> C. Lay concrete block in running bond, with 3/8 inch mortar joints struck flush at exterior and below grade and <br /> tooled concave at interior. <br /> D. Unless otherwise shown on the Drawings or required by State or local codes, reinforce foundation walls <br /> vertically with No. 4 reinforcing bars at 4'-0" o/c. Lap reinforcing minimum 24 bar diameters. Grout solid. <br /> E. Unless otherwise shown on the Drawings, install joint reinforcing in horizontal joints of masonry construction <br /> at 16 inches o/c vertically. <br /> F. Install swellable waterstop to top of footings prior to installation of first block course. <br /> G. Grout solid bottom and top courses of foundation walls and top courses at sills and ledges - trowel smooth. <br /> Verify that all exposed cores are filled to prevent air and/or moisture diffusion. <br /> H. Refer to the Drawings for continuous bond beams. <br /> I. Provide and install loose steel lintels required for support of masonry above openings. <br /> J. Install anchor bolts at top course of foundation walls at 6'-0" o/c. <br /> K. Flash masonry as shown on the Drawings and as may be required for weathertight masonry construction. <br /> 633 SPECIFICATIONS <br /> Page 24 <br />