Plumbing · P-Q7JCM

Flap Gate Connection at Concrete Manhole

Materials

Concrete Steel Metal (misc.)

Elements

Connections / Plates Roof / Floor Openings

Connections

Bolted Connection

About this detail

A flap gate is installed on a concrete manhole wall and connected to an incoming sewer pipe. The assembly is secured using four galvanized steel ASTM F1554 Grade 55 J-bolts. Openings and hole sizes are formed according to the manhole manufacturer's installation guidelines. The concrete manhole requires a 3,000 PSI mix with number 3 reinforcing bars spaced at top, sides, and bottom with two inches of minimum cover extending twelve inches around the sewer pipe.

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