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' <br /> 1.4 QUALITY ASSURANCE <br /> A. Codes and S#andards: Comply with provisions of the following codes, specifications, � <br /> and standards,except where more stringent requirements are shown or specifted: <br /> 1. ACI 318, 'Bailding Code Requirements for Reinforced Concrete." , <br /> 2. Concrete Reinforcing Steel Institute(CRSn"Manua.i of Standard Practice." <br /> PART 2-PRODUCTS � <br /> See General Structural Notes: in Divisioa I General requirements for: <br /> 2.1 REINFORCING MA.TERIALS � <br /> A. Reinforcing Baxs: <br /> B. Galvanized Reinforcing Bazs: ' <br /> C. Steel Wire: AS'TM A$2,piain,cold-drawu steel. (if any,see drawings). <br /> D. Welded Wire Fabric: (If any,see drawings). , <br /> E. Supports for Reinforcement: Bolsters, chairs, spacers, and other devices for spacing, <br /> supporting, and fastening reinforcing bars and weIded wire fabric in place. Use wire bar-tyge � <br /> supports complying with CRSI specifications. <br /> 1. For slabs-on-grade, use supports with sand plates or horizontal runners where , <br /> base material will not support chair legs. <br /> 2. For exposed-to-view concrete surfaces where legs of stipports are in contact with <br /> forms,provide supports with legs that are protected by plastic(CRSI,Class 1)or stainless ' <br /> steel{CRS�,Class 2). <br /> 2.2 CONCRETE MATERIALS <br /> A. Portland Cement: ASTM C 150,Type I. i <br /> 1. Use one brand of cement througb.aut Project unless otherwise acceptable to � <br /> Architec�. <br /> B. Fly Ash: AST'M C 618,Type F. <br /> C. Normal-\1Veight Aggcegates: ASTM C 33. Provide aggregates fram a single source for ' <br /> exposed concrete. <br /> 1. For exposed exterior surfaces,do not use fine or coarse aggre�ates that contain ' <br /> substances that can cause spailing. <br /> 2. Local aggregates not camplying with ASTM C 33 that have been shown to ' <br /> produce concrete of adequate str�ength and durability by special tests or actual <br /> service may be used when acceptable to Architect. <br /> D. Lightweight Aggregates: ASTM C 330. ' <br /> E. Water: Potable. <br /> G. Admixhtres, General: Provide concrete admixtures that contain not more than 0.1 percent , <br /> chloride ions. <br /> H. Air-Entraining Admi�cture: AS'I'M C 250, certified by manufacturex to be compatible , <br /> with other required admi�fures <br /> C�NCRETE Page 2 of 8 <br /> ' <br />