Civil · C-6599R

Pretreatment Curb Inlet Box Section and Details

Materials

Concrete Steel Stainless Steel Masonry / CMU

Elements

About this detail

This precast concrete curb inlet box is designed for HS-20 traffic loads with four-thousand PSI twenty-eight-day compressive strength concrete and grade sixty deformed reinforcing steel bars. Wall and base reinforcement consists of number five bars spaced at six inches on center all around and twelve inches on center typically. Inlet and outlet pipes connect via rubber boots, with all piping cut smooth to the box wall and joints grouted with epoxy grout. An outlet cover hood by Best Management Products Inc. or equivalent is installed with stainless steel hardware, accompanied by an anti-siphon vent routed to the bottom of the grate elevation. A two-inch by four-inch keyway is provided typically at the base joints, and a flat heel-safe grate is specified where there is no curb.

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