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PGSF WMVD Storm and Combined Sewer - Construction Package 2 Concrete Reinforcing <br />Project No. 180162 03 20 00 - 5 <br /> <br />7. Tack welding or bending reinforcing steel bars by means of heat is prohibited. <br />8. Where required by the contract documents, reinforcing steel bars shall be embedded <br />into the hardened concrete utilizing an adhesive anchoring system specifically <br />manufactured for that application. Installation shall be per the manufacturer’s <br />written instructions. <br />9. Bars with kinks or with bends not shown shall not be used. <br />10. Heating or welding bars shall be performed in accordance with AWS D1.4 and shall <br />only be permitted where specified or approved by the Owner’s Representative. Bars <br />shall not be welded at the bend. <br />3.06 FIELD QUALITY CONTROL <br />A. Field quality control shall include the following: <br />1. Notify the Owner’s Representative whenever the specified clearances between the <br />reinforcing steel bars cannot be met. The concrete shall not be placed until the <br />Contractor submits a solution to the congestion problem and it has been approved by <br />the Owner’s Representative. <br />2. The reinforcing steel bars may be moved as necessary to avoid other reinforcing steel <br />bars, conduits or other embedded items provided the tolerance does not exceed that <br />specified in this section. The Engineer’s approval of the modified reinforcing steel <br />arrangement is required where the specified tolerance is exceeded. No cutting of the <br />reinforcing steel bars shall be done without written approval of the Owner’s <br />Representative. <br />3. Coated reinforcing steel bars will be inspected on the jobsite for handling defects, <br />coating abrasion, coating thickness and continuity of coating. The Owner’s <br />Representative may defer final inspection of the coated reinforcing steel bars until <br />bar erection and handling is complete. Repair coated areas as directed by the <br />Owner’s Representative and completed prior to concrete placement. <br />4. An independent laboratory shall be employed to review and approve Contractor <br />welding procedures and qualify welders in accordance with AWS D1.4. The laboratory <br />shall visually inspect each weld for visible defects and conduct non-destructive field <br />testing (radiographic or magnetic particle) on not less than one sample for each 10 <br />welds. If a defective weld is found, the previous 5 welds by the same welder shall <br />also be tested. <br />END OF SECTION