Numbers and Titles



Includesbound and unbound base and subbase courses that separate flexible, rigid, or unit paving courses from the underlying foundation or subgrade. bound and unbound base and subbase courses that separate rail track supports from the underlying foundation or subgrade.
See31 20 00 for subgrade and roadbed. 31 24 13 for roadway embankments. 31 24 16 for railway embankments. 32 01 23 for base course reconditioning. 32 12 00 for flexible paving. 32 13 00 for rigid paving. 32 14 00 for unit paving. 34 11 00 for rail tracks. 34 71 00 for roadway construction. 34 72 00 for railway construction.
32 11 13Subgrade Modifications
32 11 16Subbase Courses
32 11 23Aggregate Base Courses
32 11 26Asphaltic Base Courses
32 11 29Lime Treated Base Courses
32 11 33Cement-Treated Base Courses
32 11 36Concrete Base Courses
32 11 39Shell Base Course