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STRUCTURES FOUNDATIONS - PILING. (REV 8-6-09) (FA 8-27-09) (1-10) SUBARTICLE 455-5.10.1 (Page 534) is deleted and the following substituted: 455-5.10.1 General: Drive piles to provide the bearing capacities required for carrying the loads shown in the plans. The Engineer will determine pile capacities using the methods described herein. For all types of bearing piles, consider the driving resistance as determined by the methods described herein sufficient for carrying the specified loads as the minimum bearing which is accepted for any type of piles. The Engineer may accept a driven pile when the pile has achieved minimum penetration, and the minimum required bearing capacity obtained for two consecutive 12 inch increments of driving. At his discretion, the Engineer may also accept a driven pile when the minimum penetration is achieved and driving has reached practical refusal in firm material. SUBARTICLE 455-5.10.2 (Page 534) is deleted and the following substituted: 455-5.10.2 Bearing Criteria: The Engineer will determine the bearing resistance of the pile using the data received from Embedded Data Collector (EDC) equipment installed in each pile according to the methods described herein. SUBARTICLE 455-5.1 OJ (Page 534) is deleted and the following substituted: 455-5.10.3 Practical Refusal: Practical refusal is defined as 20 blows per inch with the hammer operating at the highest setting which can be used without exceeding the tension or compressive allowed stresses specified in 455-5. 11.2 and less than 1/4 inch rebound per blow. Stop driving as soon as the Engineer determines that the pile has reached practical refusal. The Engineer will generally make this determination within 2 inches of driving. When the required pile penetration cannot be achieved by driving without exceeding practical refusal, use other penetration aids such as jetting or Preformed Pile Holes. SUBARTICLE 455-5.11.1 (Page 535) is deleted and the following substituted: 455-5.11.1 General: Notify the Engineer two work days prior to placement of piles within the template and at least one work day prior to driving piles. Do not drive piles without the presence of the Engineer. The Engineer will determine pile capacity of the Test Piles based on the results of Dynamic Load Tests using externally mounted instruments. Allow the Engineer one work day after driving the dynamic load tested pile to analyze the data and determine the damping value for the EDC equipment. After determining the appropriate damping value, the Engineer will determine the capacity of the production piles for each pier or bent based on EDC equipment using the Fixed Method of analysis. If the EDC does not perform to the satisfaction of the Engineer due to actions of the Contractor, engage a Specialty Engineer to perform Dynamic Load Testing of the pile '.- .' .../