A Type 'C' double catch basin features a galvanized steel frame and ADA-compliant grates. The assembly includes class 'A' concrete or precast concrete units with number four reinforcing bars maintaining a two-inch cover. A four-inch steel I-beam measuring three feet six inches long supports the top grate system. Wall thicknesses measure eight inches typically, with walls of all catch basins over ten feet deep increased to twelve inches thickness while inside dimensions remain the same. The structure sits on a concrete base with a variable height body and a minimum two-foot sump.
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