Plumbing · P-8DMKT

Precast Concrete Catch Basin and Manhole Assembly

Materials

Concrete Reinforced Concrete Steel Stainless Steel

Elements

About this detail

A four-foot diameter precast reinforced concrete catch basin and manhole assembly is installed flush with the finished grade at elevation 4275.00 feet. The top utilizes a twenty-four-inch diameter heavy-duty cast iron manhole cover and ring with adjustable grade rings as required. The structure consists of a four-foot diameter precast reinforced concrete offset cone section and standard manhole sections conforming to ASTM C478, supported by a four-foot inside diameter integral precast reinforced concrete base reaching down to the bottom of the pit at elevation 4267.00 feet. Tank perimeter drainage piping connects through a Kor-N-Seal pipe boot sleeve with a stainless steel Korband, featuring an internal cast iron backwater valve with a bronze swing-check assembly. M. A. Industries polypropylene-coated press-fit steps are spaced sixteen inches on center vertically and conform to ASTM 2146-68 Type 2 Grade 16906. Moisture detection equipment with building automation system alarm monitoring is provided at the bottom of the basin.

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