Method of forming and pouring manhole bases

Details Method of forming and pouring manhole bases Method of forming and pouring manhole bases

B - Operations, Transporting

28

B

25/66, 61/2.4

B28B 1/44 (2006.01) B28B 7/16 (2006.01) B28B 7/32 (2006.01) E03F 5/02 (2006.01)

Patent

CA 1117280

ABSTRACT OF THE DISCLOSURE The invention provides for a process for constructing manhole assemblies in an excavation or elsewhere, by the utilization of an outer form, a preformed manhole barrel which is positioned and propped within the outer form pipe stub inserted partially into the inside of the preformed manhole and resting under notches cut into the preformed manhole barrel, inflatable or rigid forms (or both) are used to form simple or complex channels in the concrete which is to be poured. The form ends are adapted to fit into the pipe stub ends or may abut other forms, where complex channels are desired. The forms are carefully positioned to allow for the proper height and grade of the channel in the completed manhole assembly. Concrete is poured and when it is set, the forms are deflated where applicable and removed to be reused.

334782

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