Abstract: A boot guard which is fitted onto the end of a sewer pipe for abutting engagement with the flexible seal between the sewer pipe and manhole side wall opening for protecting the flexibility of the joint seal and permitting easier removal of the sewer pipe for repair or replacement. The boot guard includes a generally half-circle, annular base portion having an undercut rectangular peripheral groove therein. A flexible securing band is fitted into the undercut groove and wrapped around the upper periphery of the sewer pipe for holding the base portion in place prior to concrete being poured into the bottom of the manhole construction. When concrete is poured into the bottom of the manhole construction, the boot guard prevents contact between the concrete and the flexible seal and also prevents contact between the concrete and the end of the sewer conduit.

Abstract: In a sewer manhole construction having a cylindrical bottom section adapted for placement within the ground at a pre-determined depth and having bottom and side walls, there being spaced inlet and outlet openings in the side wall above the bottom wall adapted to receive the ends of sewer conduits. The improvement which comprises a flooring upon the bottom wall including a plurality of pre-formed filler channel elements of polygonal shape and of uniform height which are mounted upon and around the bottom wall adjacent the side wall. Adjacent inner walls and opposing walls of the filler channel elements define a first channel which underlies and interconnects the inlet and outlet openings. Each channel element has a plurality of upright apertures therethrough. A layer of concrete fills the apertures and interstices between the channel elements and between the channel elements and side wall partly fills the first channel and overlies the channel elements extending the floor above the channel elements.

Abstract: In a sewer manhole construction having a cylindrical bottom section adapted for placement within the ground at a pre-determined depth and having bottom and side walls, there being spaced inlet and outlet openings in the side wall above the bottom wall adapted to receive the ends of sewer conduits. The improvement which comprises a flooring upon the bottom wall including a plurality of pre-formed filler channel elements of polygonal shape and of uniform height which are mounted upon and around the bottom wall adjacent the side wall. Adjacent inner walls and opposing walls of the filler channel elements define a first channel which underlies and interconnects the inlet and outlet openings. Each channel element has a plurality of upright apertures therethrough. A layer of concrete fills the apertures and interstices between the channel elements and between the channel elements and side wall partly fills the first channel and overlies the channel elements extending the floor above the channel elements.