A precast or cast-in-place concrete A-type curb bears on a leveling mortar bed over a plain concrete base with a specified compressive strength of twenty-four megapascals. The curb abuts new asphalt concrete pavement on one side and a subbase or sidewalk structure on the other. Below the pavement structure, a crusher-run base course designated as RM-40 provides structural subgrade support. Dimensions indicate a total depth of four hundred ten millimeters to the bottom of the base course, with specific offsets for the curb width and base staging.
100 20 150 100 10 200 PLAIN CONC BASE f'c=24 MPa 100 410 270 CRUSHER-RUN BASE COURSE (RM-40) 50 270 320 NEW AC PAVEMENT CONC A-TYPE CURB LEVELING MORTAR NOTE: 1. REFERENCE SECTION 32 16 19 OF THE SPECIFICATIONS
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