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<br />Placinq Reinforcing Bars <br /> <br />Design, detailing, fabrication and placement shall be in accordance with the <br />ACI Standard Building Code Requirements for Reinforced Concrete (ACI-318- <br />71), and Manual of Standard Practice fOr Detailin9 Reinforced Concrete <br />StructureS (ACI 315-65). <br /> <br />Concrete protection for reinforcing bars shall be as follows, except as <br />otherwise shown on the Plans: <br /> <br />3" for concrete deposited against the ground <br /> <br />2" for bars larger than #5 or 1 1;'2" for bars #5 or smaller when <br />concrete is exposed to the ground, weather or Ivater after removal of <br />forms <br /> <br />1 1/2" for beams, girders and columns <br /> <br />3/4" for underside of slabs <br /> <br />I" for inside walls <br /> <br />Reinforcing bars shall be placed in the corc'rete where shown on the Drawings. <br />Unless otherwise prescribed, measurements made in placing the bars shall be <br />to the centerlines of the bars. <br /> <br />The location of splices as shown on the Drawings shall not be altered <br />without written approval by the Engineer. In order to meet design and space <br />limitations on splicing, some bent bars may exceed usual shipping clearances. <br />Cutting and bending of such bars from stock lengths may be required at the <br />site. <br /> <br />Reinforcement will be inspected for compliance with requirements as to size, <br />shape, 'length, spl icing, position and amount after it has been placed. <br /> <br />Before the reinforcement is placed, the surfaces of the bars and the surfaces <br />of any metal bar supports shall be cleaned of heavy flaky rust, loose mill <br />scale, dirt, grease, or other foreign subs1:ances wh1'ch, in the opinion of <br />the Engineer, are objectionable. Heavy f'laky rust that can be removed by <br />firm rubbing with burlap or equivalent treatment is considered objectionable. <br />After being p'laced, the reinforcing bars shall be maintained in a clean <br />condition until they are completely embeddE0 in the concrete. <br /> <br />Reinforcing bars shall be accurately placed and secured in position so that <br />they will not be displaced during the placing of the concrete, and special <br />care shall be exercised to prevent any disturbance of the reinforcement in <br />concrete that has already been placed. ME~tal chairs, metal hangers, metal <br />spacers, or other satisfactory metal sUppOt.ts may be used by the Contractor <br />for supporting rein~rcement bars. The reinforcement in structures shall be <br />so placed that there will be a clear distance of at least one (1) inch <br />between the reinforcement and any anchor bolts or other embedded metalwork. <br />