E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
61/2.4
E02D 29/12 (2006.01)
Patent
CA 1068495
ABSTRACT An integral passageway is formed in a manhole construction to establish communication between an upper inlet to the manhole and a bottom outlet. Precast sections having such a passageway formed therein may be employed to build a desired height of the manhole, an upper one of the sections having an in- let for connection to a service line and the precast sections being stacked such that the upright passageways therein are in vertical alignment.
275473
Harris James R.
Kalkhoven Allen B.
Harris James R.
Kalkhoven Allen B.
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