Preformed manhole base section construction

Details Preformed manhole base section construction Preformed manhole base section construction

1978-02-15

1981-03-03

Bell, J. Karl

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

52 21, E02D 2912

Patent

active

042532825

ABSTRACT:
A preformed concrete unitary manhole base section is formed with a polygonal exterior wall with a plurality of substantially flat faces each aligned in a different direction. Some of the faces are formed with cylindrical openings into which standard drain conduit end portions closely fit. Compressible annular seals between the opening walls and the end portions effect a watertight seal between the section and the conduits. Interior flow contours are formed within the section between the openings. Separate plural handling and alignment facilitating means are formed in the exterior wall.

REFERENCES:
patent: 3744806 (1973-07-01), Keyser
patent: 3787078 (1974-01-01), Williams
Engineering News. Record, Nov. 1, 1962, p. 12.

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