Sewer manhole channel construction and method

摘要: In a sewer manhole construction having cylindrical bottom section adapted for placement within the ground at pre-determined depth and side walls, there being spaced inlet outlet openings in wall above to receive ends of conduits. The improvement which comprises flooring upon including plurality pre-formed filler channel elements polygonal shape uniform height are mounted around adjacent wall. Adjacent inner walls opposing define first underlies interconnects openings. Each element has upright apertures therethrough. A layer concrete fills interstices between partly overlies extending floor elements. concave is formed top vertical registry with its communicating