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3.04 PLACING AND FASTENING <br /> The placing,fastening,splicing and supporting of reinforcing steel and bar mat reinforcement shall be in <br /> accordance with the plans and the latest edition of"CRSI Recommended Practice for Placing Reinforcing <br /> Bars". In case of discrepancy between the plans and the CRSI publication stated above,the plans shall <br /> govern. <br /> Steel reinforcement shall be accurately placed in the positions shown on the plans and firmly held during <br /> the placing and setting of concrete by means of spacer strips,stays,metal chairs or other approved devices <br /> or supports. When metal chairs are used,the part of the chair in contact with the form and at least 1 inch <br /> from the form shall be hot dip galvanized or plastic coated. Other coatings or treatments will be acceptable <br /> when specifically accepted by the Engineer. Precast concrete bricks or other accepted bricks or blocking <br /> may be used in structures to support reinforcement in footings or slabs placed on grade;however,the bricks <br /> or blocking shall not contact the reinforcement over a distance greater than the depth of a standard concrete <br /> brick.Reinforcing shall be embedded with 3"of concrete where cast against earth and 2"of concrete <br /> elsewhere unless otherwise noted on the Plans. <br /> Bars shall be securely tied at all intersections except where spacing is less than V in each direction,when <br /> alternate intersections shall be tied. Tying of steel by spot welding will not be permitted unless specifically <br /> authorized by the Engineer. The placing and securing of the reinforcement in any unit or section shall be <br /> accepted by the Engineer before any concrete is placed in any such unit or section. At the time the concrete <br /> is placed,the reinforcing steel required shall be free from flaky rust,mud,oil or other coatings that will <br /> destroy or reduce the bond. <br /> 3.05 SPLICING <br /> Bar Steel reinforcement shall be furnished in the full lengths indicated on the plans. Splicing of bars, <br /> except where shown on the plans,will not be permitted without the written acceptance of the engineer.All <br /> splicing shall strictly follow and adhere to all ACI codes and requirements. Splices shall preferably be <br /> staggered. In cases where permission is granted to splice bars,other than those shown on the plans,the <br /> additional material required for the lap shall be furnished by the contractor at his own expense. <br /> MINIMUM LAP LENGTHS <br /> Bar No. Slice Lap Length(in.) <br /> 4 25 <br /> 5 31 <br /> 6 37 <br /> 7 54 <br /> 8 62 <br /> 9 70 <br /> 3.06 BENDING <br /> All bars shall be bent cold. No bars partially embedded in concrete shall be field-bent. <br /> Bends on all bars shall have a radii on the inside of the bar not less than the value of the following: <br /> Bar Size Minimum Radii <br /> #3,94,#5 2 1/2 bar diameters <br /> #6,#7,#8 3 bar diameter <br /> #9,#10,#11 4 bar diameter <br /> Section 03210-Page 2 of 3 9/17 <br />