Method and apparatus for forming inverts in manhole assemblies, and the like

摘要: Method and apparatus for forming inverts in the manhole base of a assembly using single pour technique. In technique, invert is formed simultaneously with formation through use including mold member having channel-shaped projection defining invert. Means are provided simply, yet precisely, aligning members openings sidewalls by whose precise alignment associated sidewall openings. The utilized incorporates at least one adjustably positionable channel-forming an communicating between each central axis intersecting axes define angle different from 180°. Alignment on employed two technique cooperate joining bar clamping means to assure horizontal projections form