초록 ▼

A plastic stackable riser for providing a grade level access for underground components such as septic tanks, distribution boxes, and drop boxes, is disclosed. The stackable riser includes a continuous peripheral side wall having a top free edge and a bottom edge. The top free edge defines a first e

A plastic stackable riser for providing a grade level access for underground components such as septic tanks, distribution boxes, and drop boxes, is disclosed. The stackable riser includes a continuous peripheral side wall having a top free edge and a bottom edge. The top free edge defines a first end opening and the second bottom edge is connected to a generally inverted U-shaped connecting member which defines a channel shaped to receive the first free edge portion of an adjacent stackable riser. In use, a plurality of stackable risers are interlocked together so that the side walls all extend along common vertical axes to the underground component.

대표청구항 ▼

A stackable riser and underground component combination comprising: an underground component positioned below grade level and including access means for allowing access to an interior of said underground component; at least one stackable riser including an uppermost riser and a continuous peripheral

A stackable riser and underground component combination comprising: an underground component positioned below grade level and including access means for allowing access to an interior of said underground component; at least one stackable riser including an uppermost riser and a continuous peripheral side wall having inner and outer surfaces and having a top edge portion and a bottom edge portion, said inner surface of said peripheral wall defining a vertical passageway extending between said top and bottom edge portions; said at least one stackable riser further including a U-shaped connecting member extending from said bottom edge portion of said side wall which includes a transverse intermediate portion and first and second generally perpendicular dependent legs, said U-shaped connecting member defining a channel between said dependent legs which is shaped to receive a top edge portion of another riser; said at least one stackable riser including a first riser which has its U-shaped connecting member positioned on said underground component so that said passageway is positioned above said access means; cover means for attaching to said uppermost riser and for covering said vertical passageway, said cover means comprising an imperforate cover including a generally U-shaped peripheral attachment portion which includes a transverse intermediate portion and first and second depending legs, said U-shaped attachment portion defining a channel between said first and second depending legs which is shaped to receive said top edge portion of said uppermost riser; and a plurality of vertically-extending inner ribs positioned on said inner surface of said side wall of said at least one stackable riser, said inner ribs including terminal edges which form shoulders positioned a predetermined distance away from a tip of said top edge portion of said side wall.