MH/CB Square Frame w/Square Flat Grate (400.02)
Manufactured by Sigma Corporation
Brand: Calcutta Ferrous
Heavy duty, load bearing grey cast iron square frame complete with flat or v-type herring bone grate or alternately with flat perforated grid.
Drainage and Sewer Works | Maintenance Hole, Catch Basin, Ditch Inlet Units and Valve Chambers | Accessories | Frames and Covers | Gray Cast Iron
Ontario Provincial Standards
OPSD 0400.0200 - Cast Iron, Square Frame With Square Flat Grate For Catch Basins, Herring Bone Openings
American Society for Testing and Materials