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' <br /> psi), compressible up to 35 percent, of width and thiclrness indicated, formulated from the following <br /> � material: <br /> I. Neoprene. <br /> 2. Urethane. <br /> � 3. Polyvinyl chloride. <br /> B. Preformed Control Joint Gaskets: Material as indicated below, designed to fzt standard <br /> � sash block and to maintain lateral stability in masonry wall; size and configuration as <br /> indicated. <br /> 1. Styrene-Butadiene Rubber Compound: ASTM D 2000,Designation 2AA-805. <br /> � 2. Polyvinyl Chloride: ASTM D 2287,General Purpose Grade,Type PVC-65406. <br /> ' 2.8 MORTAR AND GROUT 1VIIXES <br /> A. General: Do not add admixtures including coloring pigments, air-entraining agents, <br /> accelerators,retarders,water repellent agents, antifreeze compounds,or other admixtures, , <br /> ' unless otherwise indicated. <br /> 1. Do not use calcium chloride in mortar or grout. <br /> � B. Mortar for Unit Masonry: Comply with ASTM C 270,Proportion Specification,for types <br /> of mortar indicated below: <br /> , C. Mortar for Unit Masanry: Comply with ASTM C 274, Property Specification for job- <br /> mixed mortar and ASTM C 1142 for ready-mixed mortar,of types indicated below: <br /> , D. Grout for Unit Masonry: Comply with ASTM C 4'76 and referenced unit masonry <br /> standard. <br /> PART 3 -EXECUTION <br /> � 3.1 EXAMIlVATI�N <br /> , A. Examine conditions, with Installer present, for compliance with requirements for <br /> installation tolerances and other specific conditions, and other conditions affecting <br /> performance of unit masonry. <br /> ' 3.2 LAYING MASONRY WALLS <br /> A. Lay out walls in advance for accura.te spacing of surface bond patterns with uniform joint <br /> � widths and for accurate iocating of openings, movement-type joints, retums, and offsets. <br /> Avoid the use of less-than-half-size units at corners,jambs, and where possible at other <br /> locations. <br /> � B. Lay up wal�s to comply with specified construction tolerances, with courses accurately <br /> spaced and coordinated with other construction. <br /> � C. Lay concealed masonry with aIl units in a wythe in running bond or bonded by Iapping <br /> not Iess than 2 inches. Bond and interlock each course of each wythe at corners. Do not <br /> use units with less than nominal 4-inch horizontal face dimensions at corners or jambs. <br /> � D. Stopping and Reswning Work: In each course, rack back 1/2-unit length for on�half <br /> nznning bond or 1/3-unit length for one-third running bond; do not tooth. Clean exposed <br /> surfaces of set masonry, if required}, and remove loose masonry units and mortar prior to <br /> , laying fresh masonry. <br /> iINIT MASONRY Page 5 of 6 <br /> , <br />