These civil details show standard cast-in-place concrete curbs adjacent to asphalt concrete or concrete pavement. The six-inch curb features a twelve-inch overall depth with a six-inch top width and nine-inch base width, bearing on compacted subgrade alongside Class 2 aggregate base or twelve inches of compacted native soil. The twelve-inch curb provides a twenty-four-inch overall height, reinforced with two continuous number four bars, with a one-inch minimum finish grade offset and a two-inch clear dimension. Both curbs require Class 3 concrete with five and one-half sacks per cubic yard, expansion joints spaced at thirty feet, and weakened plane joints spaced at fifteen feet.
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