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Job Name: <br />Job Number: <br />Date: <br />T15 <br />Lincoln Elementary School <br />69998 <br />5/15/2015 <br />Preliminary Information <br />R -Value of Subgrade= 50 <br />GE (Gravel Equivalent) Required= 9.60 <br />Gf (Gravel Factors) <br />ASB 1.0 <br />AB 1.1 <br />AC (Off Chart <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 -5.60 <br />Required Overlay Thickness (inches)= 2.80 <br />Desired Section Thicknesses (inches) <br />ASB 0:0 <br />AB 4 0 <br />AC 3.5 <br />Calculated GE= 11.4 <br />Current Section Sufficient? Yes <br />Excess / Deficiency in GE 1.80 <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 3.0 <br />Required AB Thickness (inches) 3.3 <br />Given AB, Find AC Thickness (inches) ** <br />AB <br />Required AC Thickness (inches) 2.9 <br />** Assuming no ASB is used <br />69998 Caltrans Pavement Calculations.xlsx <br />