5.1 Introduction
For CRCP design, the required pavement thickness is the thickness
in which the predicted number of punchouts per mile is less than
the design requirement. For CRCP designs, the input thickness should
be in 1/2-in. increments. The minimum thickness for CRCP is 7 in.,
and the maximum thickness is 13 in. Use 13 in. for slab thicknesses
greater than 13 in. Districts wanting to use thicker pavements should
submit designs greater than 13 in. to the district engineer for
approval along with their justification for doing so.
For CPCD design, the computed concrete slab thickness should
be rounded to the nearest full or half inch. For example, use slab
thickness of 11.5 in. for computed thickness of 11.4 in., and use slab
thickness of 10 in. for computed thickness of 10.24 in. The minimum
slab thickness for CPCD is 6 in., and the maximum thickness is 12
in. It is recommended to use CRCP for sections where the CPCD design
thickness is greater than 12 in.