Type MG – Safety Hatch Drainage Frame

MSU MG Safety hatches are designed to be cast into place in areas where fall protection is required.

Safety controls are engineered right into all MSU access hatches.

MG access hatches are:

  • Aluminum or stainless steel, types 304 or 316, construction
  • Hinged safety orange grating for aluminum hatches
  • Gasketed angle frame
  • Welded drain coupling and ABS fittings
  • Slip resistant checker plate lid
  • Hold-open arm, in type 316 stainless steel, locks lid safely at 90 degrees vertical
  • Continuous hinges 316 stainless steel with all countersunk fasteners
  • Lifting spring in 316 stainless steel
  • Compartment latch in type 316 stainless steel with sealing plug and opener
  • Recessed padlock hasp (padlock by others)
  • Cast anchors
  • Bituminous paint on all areas in contact with concrete
  • All fasteners in stainless steel, type 316
  • Welding to CSA W47.2

MSU MG hatches are manufactured in single, double and parallel-door units.

MG Single-Door Unit 900 x 900
MGD Double-Door Unit 1200 x 1200
MGP Double-Door Parallel Unit 900 x 1450
**Sizes shown are examples only**


  • Insulation with back pan (Styrofoam sm 50 mm standard)
  • Safety posts and chains
  • Stainless Steel, Types 304 and 316
  • Custom signage, lettering and wording
  • Custom finishes: anodizing, painting