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

Certifications: PMC - Accepted for Use Durham Region Approved Products List

Prequalification Lists: 
Regional Municipality of Durham - - Grey Cast Iron (PDF)
  • 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
  • Other Standards