A concrete slab transition interfaces with asphalt concrete paving and a variable-depth rock base. The concrete slab features a 6.5-inch main thickness with a 6-inch thickened edge step measuring 8 inches wide, and includes no. 3 reinforcing bars placed mid-slab at 18 inches on center each way with 3 inches of clear cover from edges. Subgrade preparation requires lime treatment per the geotechnical report. The top surface slopes to conform to the grading plan, sitting 0.25 inches above the adjacent asphalt paving surface.
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