A concrete curb features a half-inch radius edge alongside asphalt concrete pavement over Class II aggregate base. Number 4 by 12-inch slip dowels and quarter-inch expansion joint material are spaced at 20 feet on center through the concrete section. Detail A highlights the rounded 1-half-inch radius concrete edge and the quarter-inch vertical clearance adjacent to the pavement. Subgrade preparation must follow geotechnical recommendations, and expansion joint material must conform to ASTM designation D 1751.
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