An improved method and apparatus for attaching a hole former to a mold assembly for use in the formation of cast materials such as concrete and the like. The apparatus comprises a hole former assembly attached to a bracket. The bracket is held in a stationary position by a magnet assembly that is remotely located from the hole former. The magnet assembly is comprised of a plurality of magnets encased in a metal casing. An expendable blister pack can be provided to fit on the outside of the casing to facilitate removal of the magnetic assembly from the cast member.
Method And Apparatus For Rehabilitating Sewage Manholes
Sewage manholes having a deteriorated or defective manhole housing which is subject to undesired ground water infiltration are rehabilitated by inserting annularly expandable tubular sleeve assemblies partially into each inflow and outflow pipe of the manhole, connecting the sleeve assemblies to one another via an annularly-closed tubular conduit or network of tubular conduits and then sealing the sleeve assemblies to the inflow and outflow pipes and to the tubular conduit or conduits to form a fluid flow path between the inflow and outflow pipes which is sealably enclosed against water infiltration and sewage exfiltration.
Forming Element And Forming Apparatus For Casting Manhole Inverts
Apparatus for forming inverts in manhole floors between angularly-related pipeline sections includes a set of a plurality of wedge-shaped forming elements each having a molding surface of corresponding compound longitudinal and transverse arcuate curvature, the forming elements being of respectively varying longitudinally arcuate extents and being adapted for longitudinal end-to-end joinder for producing a variety of angular curvatures. The forming apparatus is set-up in the manhole between the pipeline sections with the molding surface downwardly facing and concrete is poured about the apparatus, the concrete thereby setting in conformity with the apparatus' molding surface to create a curvilinear invert between the pipeline sections.