These isometric details and cross-section illustrate a concrete sidewalk ramp and curb ramps with a two-foot-wide detectable warning pattern per detail 03/C-405. The assembly features a cast-in-place concrete curb with a transition from zero to six inches and a depressed curb at the pavement flush with the asphalt concrete paving. Three-eighths-inch expansion joints are spaced typically across the sidewalk, which maintains a four-foot minimum width and a maximum two percent cross slope. Section A-A highlights an eight-foot width with a four-inch concrete thickness and two percent slope transitioning to the top of asphalt concrete paving.
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