Landscape · L-A6RMF

Athletic Landing Pit Section with Concrete Curb and Drainage Trench

Materials

Elements

Stairs Drainage Site / Paving Reinforcing

About this detail

A nine-foot wide landing pit is bounded by reinforced concrete curbs containing continuous number 3 rebar at the top and bottom with three-inch concrete clearance. The top of the curb finishes flush with adjacent synthetic turf rubber infill on one side and natural grass on the other. Beneath the landing pit sand lies a geotextile filter fabric with eighteen-inch long slits centered over an infiltration trench. A four-inch perforated lateral drain pipe sits inside a one-foot wide base stone trench with a one percent slope. The subgrade is compacted to ninety-five percent density or built over a four-inch minimum crushed surfacing top course per WSDOT standards.

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