Type BD – Bolt Down

MSU BD hatches are designed for surface mount applications where flush design is not required. These hatches are non-load bearing and are an economical choice.

Safety controls are engineered right into all MSU access hatches.

BD access hatches are:

  • All aluminum construction
  • Raised weatherproof, 75 mm angle frame design
  • Neoprene seal between frame and concrete surface reduces infiltration
  • Shoebox lid reduces infiltration
  • External lifting handle and lock mechanism (padlocks by others)
  • Hold-open arm, in type 316 stainless steel, locks lid safely at 90 degrees vertical
  • Heavy duty extruded hinging system
  • All bolts and wedge anchors in stainless steel, type 304
  • Welding to CSA W47.2


MSU BD hatches are manufactured in single and double door units only
BD Single-Door Unit 900 x 900
BDM Single-Door Unit for 900 x 900
**Sizes shown are examples only**


  • Gasket between frame and lid
  • Stainless-steel slam lock with sealing plug and opener
  • Stainless-steel lifting spring
  • Insulation with back pan (Styrofoam SM 50 mm standard)
  • Custom signage, lettering and wording
  • Custom finishes: anodizing, painting