CONCRETE PIPE Prebenched 1200 mm Diameter Manhole Material Prebenched manholes at the Lafarge Pipe Operation in Edmonton are manufactured using drycast concrete manhole barrels, which are cored at the facility with the appropriate size and location required for the project. For PVC DR35 connections, a PSX Direct Drive gasket is provided (pictured opposite), which is mechanically torqued into cored barrel openings. A wetcast base is then poured in the manhole barrel to form a single piece, with channels provided to match the intended pipe diameters and finished to ensure a positive directional flow. Connection Pipe Size (DR35 Plastic or Ultra-Rib) 150/200 250 300 375 450 150/200 250 300 375 450 525 600 Product Description Effective Height 610 610 610 610 610 1016 1016 1016 1016 1016 1016 1016 Product Weight (kg) 2200 2200 2200 2200 2200 3000 3000 3000 3000 3000 3000 3000 1200 dia. x 810 mm Barrel 1200 dia. x 810 mm Barrel 1200 dia. x 810 mm Barrel 1200 dia. x 810 mm Barrel 1200 dia. x 810 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel 1200 dia. x 1220 mm Barrel Notes: • • Prebenched bases requiring connectors for 675 mm diameter and larger pipe must be manufactured in 1500 and 1800 mm diameter material. PSX Direct Drive connectors are only used with PVC DR35 pipe. For ultra-rib and concrete pipe connections, a cored hole or rough opening will be provided for a grouted connection. PAGE 16 LAFARGE PIPE eMANUAL