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■ <br />Medium - Strength Carbon -Steel Casting for General Application," one -piece <br />castings. <br />■ <br />4.8 CONCRETE MIXTURES: <br />■ <br />Mix designs shall be developed by the pile Manufacturer using the <br />1 materials as specified herein. The designs shall comply with the requirements <br />of ACI 318 and shall have been prepared in accordance with ACI 211.1 for the <br />' concrete strengths shown on the contract drawings. The mix designs shall be <br />based on materials previously evaluated by the pile Manufacturer using <br />■ established methods of statistical quality control that conform to ACI 214. <br />4.9 FORMWORK: <br />Provide exterior forms of steel on concrete founded casting beds. Side <br />forms for square piles may have minimum draft adequate for stripping. Interior <br />forms shall be of steel and either the fixed- collapsible or moving - mandrel <br />type capable of maintaining specified dimensional tolerances. Forms must be <br />cleaned and oiled prior to placement of reinforcing. <br />4.10 PLACEMENT OF REINFORCING: <br />Place prestressing strands symmetrically in the piles and jack <br />simultaneously to specified force. Space spiral wire to specified pitch and <br />tie adequately to maintain position during placement of concrete. <br />4.11 PLACEMENT OF CONCRETE: <br />Place concrete continuously and consolidate with high frequency <br />vibration. Strike -off unformed surfaces and apply good float finish. <br />TS -21 <br />RJC=fO3/SUNNY ISLESRECHSPECS <br />