Manhole extender ring system and method of use

摘要

A manhole extender ring system 2 comprises an annular base member 4 having a flange 24 disposed therein, an annular insert member 32 slidably disposed within the base member 4 and supported by the flange 24, an annular ring member 44 having a ring top surface 46 slidably engaging the insert member 32 and supported by the base member 4 and a cover member 62 having a cover top surface substantially flush with the ring top surface 46 slidably disposed within the ring member 44 and supported by the insert member 32. The ring member 44 is removably mounted to the base member 4 by use of a variable, elongate stabilizer bracket 70 having a J-shaped end 78 and a C-shaped end 86. The J-shaped end 78 removably engages a shoulder 60 of the ring member 44 and the C-shaped end 86 removably engages the flange 24. Pins 98 may be disposed on the insert and ring top surfaces to removably engage receiving bores disposed on the insert and ring bottom surfaces when the insert and ring members are in a multiple stacked relationship.