Quarter-inch by quarter-inch grooves are formed into the concrete paving at the top or bottom of ramps. Grooves in the concrete are spaced three-quarters of an inch on center over a one-foot span.
1/4" x 1/4" GROOVES IN CONC. PAVING AT TOP OR BOTTOM OF RAMPS SEE RAMP DETAILS FOR LOCATION GROOVES IN CONCRETE SHALL BE 3/4" ON CENTER 1'-0" 3 4 "
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