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MainPlace Mall Transformation Project 12126.001 <br />Traffic Indexes (Tls) used in our pavement design are considered for a <br />pavement life of approximately 20 years with a normal amount of flexible <br />pavement maintenance. <br />Portland Cement Concrete (PCC) Pavements: For light axle loads and <br />average daily truck traffic (ADT) up to 300, fire lanes subject to outrigger <br />loads, trash corral aprons, or other areas where point loads are possible, <br />should be paved with Portland Cement Concrete (PCC) with a minimum <br />thickness of 7 inches over 4 inches of Class 2 base materials The <br />recommended PCC pavement section was derived the Guide for Design <br />and Construction of Concrete Parking Lots by the American Concrete <br />Institute (ACI 330R-08). All PCC pavements should have a minimum 28- <br />day concrete compressive strength of 3,000 pounds -per -square -inch (psi), <br />and have appropriate joints and saw cuts with maximum spacing not to <br />exceed 12.5 feet. Load transfer devices, such as dowels or keys, are <br />recommended at joints in the paving to reduce possible offsets. Steel <br />reinforcing may be added to the paving to reduce cracking and to prolong <br />the life of the paving. <br />Integral curbs should be used at the perimeter of PCC pavement. <br />Longitudinal joints should be avoided near curbs and gutters. Use of <br />concrete cutoff or edge barriers should be considered at the perimeter of <br />common parking or driveway areas when abutting either open (unfinished) <br />or landscaped areas. <br />Paving Materials: All pavement materials should conform to the latest <br />edition of the Caltrans Standard Specifications or the latest edition of the <br />Standard Specifications for Public Works Construction (Green Book). <br />18 9 <br />Leighton <br />