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.,Low-Volume Road Design If-85 <br /> Table 4.8. rigid pavement design catalog for low- <br /> volume roads:recommended minimum PCC <br /> slab thickness(inches)fcrthree levels of axle <br /> toad traffic end five level; of roadbed soil <br /> quality. Inherent reliabbiNty: 50 percent. <br /> Traffic Level <br /> Relative Quality <br /> of Roadbed Soil Low Medium HiLh <br /> Very Good 5 5 i4 6 <br /> Gcod 5 5 ': 6 <br /> Fa,r 5 5 !Z 6 °I <br /> ?:;or :=z <br /> Very,ec+cr <br /> "fable 4.9. Rigid pavement design catalog for low- <br /> volume roads:recommended minimum PCC <br /> slab thickness(inches)forthree levels of axle <br /> load traffic and five levels of roadbed soil <br /> quality. 4nherent reliability: 75 percent. <br /> Traffic Level <br /> Relative Quality <br /> of Roadbed Soil Low Medium High <br /> Very Good 5 51h 6 Yh <br /> Good S 5 Yi 7 <br /> Fair 6 6 7 <br /> Poor 6 - 6 7 <br /> Very PCOr C, 6 7 <br />