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LJ <br />APPENDIX A <br />DESIGN CALCULATIONS <br />Structural Number Verification <br />(AASHTO Design of Pavement Structure - 1986) <br />• <br />Traffic: Design 18 kip ESAL: 120,000 <br />Reliability: s0 percent <br />Overall Deviation: 0.40 <br />Soils: Resilient Modulus 5000 psi <br />PSI Loss Due To Traffic: 2.0 <br />Required Structural Number = 2.26 <br />Required Gravel Section <br />LJ <br />Minimum Structural Number(MSN) required = . 26 <br />Gravel Section Required, using 4 inches of new base course and 3 inches of existing gravels = > <br />(z.26 - a(o.la) - x(0.06))/0.10 = ls.z = > <br />Use 16 inches of subbase gravels and 4 inches of road base gravels. <br />iRa~ <br />