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<br /> <br />APPENDIX A <br />DESIGN CALCULATIONS <br /> <br />Structural Number Verification <br />(AASHTO Design of Pavement Structure - 1986) <br />Traffic: Design 18 kip ESAL: <br />Reliability: <br />Overall Deviation: <br />Soils: Resilient Modulus <br />PSI Loss Due To Traffic: <br />Required Structural Number = 1.22 <br />Required Gravel Section <br /> <br />Minvnum Structural Number(MSN) required = 1.22 <br />Gravel Section Required, using 6 inches of ettisting base course gravels = > <br />(1.22 - x(0.11))/0.14 = 4.8 = > <br />Add 5 inches of new road base gravels. <br />6,500 <br />50 percent <br />0.40 <br />6500 psi <br />2.0 <br />j P, acs <br />