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.lob Nance: <br />Job Number: <br />Date: <br />Preliminary Information <br />T.I.= <br />R -Value of Subgrade= <br />GE (Gravel Equivalent) Required= <br />Gf (Gravel Factors) <br />ASB <br />AB <br />AC (Off Chart *) <br />Tia. <br />Lincoln Elementary School <br />6999B <br />5/16/2016 <br />11.52 <br />1.0 <br />1.1 <br />2.00 <br />Existing Section Thicknesses (inches) <br />ASB <br />AB <br />AC ..2.0 <br />Current GE= 4.00 <br />Current Section Sufficient? No <br />Excess / Deficiency in GE -7.52 <br />Required Overlay Thickness (inches)= 3.76 <br />Desired Section Thicknesses (inches) <br />ASB <br />fl.0 <br />AB <br />AC <br />4:0 <br />Calculated GE= <br />13.5 <br />Current Section Sufficient? <br />Yes <br />* Use Chart for "Relationship Between <br />Gravel Equivalent Factor for Asphalt <br />Concrete and Traffic index" with <br />Gf(ac)=2.5*(5.14/TI)^0.5 <br />Given AC, Find AB Thickness (inches) ** <br />AC 3, <br />Required AB Thickness (inches) 4.1 <br />Given AB, Find AC Thickness (inches) ** <br />AB 4.5 <br />Required AC Thickness (inches) 3.3 <br />Excess / Deficiency in GE 1.98 <br />** Assuming no ASB is used <br />6999B Caltrans Pavement Calculations.xlsx <br />