MH/CB Frame / Flat Square Grate - 400.02
Manufactured by Govind Steel Company Ltd.
Catchbasin (CB) / maintenance hole (MH) gray cast iron casting with square frame and removable square cover with slotted parallel diagonal drainage openings.
Ontario Provincial Standards
OPSD 400.020 - Cast Iron, Square Frame With Square Flat Grate For Catch Basins, Herring Bone Openings
OPSS 1850 - Frames, Grates, Covers and Gratings
OPSS 407 - Maintenance Hole, Catch Basin, Ditch Inlet and Valve Chamber Installation
American Society for Testing and Materials
Wolseley Waterworks Group