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PART 3 - EXECUTION <br /> ' 3 . 01 INSTALLATION. GENERAL <br /> A . Do not wet concrete masonry units . <br /> ' Be Cleaning Reinforcing : <br /> Before placing, remove loose rust, and other coatings from reinforcing . <br /> C . Thickness : <br /> Build walls to the actual thickness of the masonry units, using units of nominal <br /> ' thickness indicated. <br /> D . Build chases and recesses as shown on required and required for the work of other <br /> ' trades . Provide not less than 8 " of masonry between chase or recess and jamb of <br /> openings, and between adjacent chases and recesses . <br /> ' E . Leave openings for equipment to be installed before completion of masonry work. <br /> After installation of equipment, complete masonry work to match work <br /> ' immediately adjacent to the opening . <br /> F . Cut masonry units using motor-driven saws to provide clean, sharp, unchipped <br /> ' edges . Cut units as required to provide continuous pattern and to fit adjoining work. <br /> Use full-size units without cutting where possible . <br /> Use dry cutting saws to cut concrete masonry units . <br /> 3 . 02 CONSTRUCTION TOLERANCES <br /> ' A . Variation from Plumb : <br /> For vertical lines and surfaces of columns , walls and arises do not exceed 1 /4 " in <br /> 10' or 3 /8 " in a story height not to exceed 20 ' , nor %2 " in 40' or more . For external <br /> corners , expansion joints , control joints , and other conspicuous lines , do not exceed <br /> 1 /4 " in any story of 20 ' maximum, nor %i " in 40 ' or more . For vertical alignment of <br /> head joints do not exceed plus or minus 1 /4 " in 10' 3 %2 " maximum . <br /> Be Variation from Level : <br /> ' For bed joints and lines of exposed lintels , sills , parapets, horizontal grooves and <br /> other conspicuous lines, do not exceed 1 /4 " in any bay or 20' maximum , nor %2 " in <br /> 40 ' or more. For top surface of bearing walls no not exceed 1 /8 " between adjacent <br /> ' floor elements in 10 ' or 1 / 16 " within width of a single unit. <br /> C . Variation of Linear Building Line : <br /> For position shown in plan and related portion of columns , walls and partitions , do <br /> not exceed % " in any bay or 20 ' maximum, nor 3 /4 " in 40' or more . <br /> 04200-5 <br />