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603284-001 <br />TABLE 7: HMA PAVEMENT SECTIONS <br />Traffic Index HMA Base Course <br />(TI) (in) (inches) <br />4 3 4 <br />5 3 6 <br />6 4 6 <br />7 4 10 <br />8 5 12 <br />Representative samples of the actual subgrade materials should be <br />obtained and tested for R-Value following rough grading of the pavement <br />subgrade to confirm the pavement design sections. <br />5.7.3 Rigid Pavement <br />Preliminary rigid pavement sections are based on Chapter 620 of the <br />Highway Design Manual (HDM) for jointed plain concrete pavement <br />(JPCP). Assuming that the paving subgrade will consist of Type 11 soil <br />subgrade with an R-value between 10 and 40 per Chapter 620 of the HDM <br />and compacted to at least 95 percent relative compaction based on ASTM <br />Test Method D 1557-10, the preliminary design sections of rigid jointed <br />plain concrete pavement (JPCP) without lateral supports are presented in <br />the following table. Details of the JPCP pavement sections should follow <br />the recommendations outlined in Chapter 620 of the HDM. <br />TABLE 8: JPCP SECTION WITHOUT LATERAL SUPPORT <br />Traffic Index (TI) <br />JPCP Base Course <br />(in) (inches) <br />TIE 9 <br />9.5 < TI < 10 <br />9.0 12 <br />9.6 12 <br />-29- <br />Leighton