Pull-Down Roof Hatch Access Ladders

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Williams Brothers - WB Super Simplex Series Pull-Down Roof Hatch Access Ladders

Drop-Down Stairway with Folding Ladder Provides Convenient Access to Roof Hatches!

The WB Super Simplex Disappearing/Foldable Stairway & Ladder is perfect for industrial applications where a foldable ladder or stairway is necessary. This stairway and ladder is available in either fire-rated or non-rated. This ladder is also available with a built in roof hatch for easy installation.


  • Customized Units: Built to the exact finished ceiling and floor/roof deck heights
  • Construction: 11 Gauge formed steel frame with extruded aluminum treads and side rails – 5 3/16” tread depth
  • Approvals: Meets requirements of A.N.S.I. A14.9 for commercial or residential use
  • Rugged: Overall test weight of 500 lbs., individual tread test weights of 1000 lbs. and actual shear of rivets tested to 1175 lbs.
  • Ceiling Height: Can accommodate ceiling heights up to 13′ 6″


  • Bracket: Floor Mounting Bracket
  • Fire-Rated Models: Units available with a 2 Hour fire-rated Warnock Hersey label that meets ASTM-E-119 and UBC 43-7 requirements, passed 250° temperature rise in the first 30 minutes
  • Lock: Lock on door panel (standard on fire-rated models)
  • Deep Box: Special Deep Box and Deep Angle frames to accommodate dropped ceilings
  • Fold-Assist: Standard on units 9′ 10″ and taller
  • Custom Roof Access: For units accessing a roof, custom roof hatches are produced and factory mounted then shipped to the job site as one complete roof access system


The WB Super Simplex Disappearing/Foldable Stairway is proudly made in the USA. Lead time is approximately one week. Request a quote to receive pricing on your disappearing/foldable stairway today!

Manufactured for The Williams Brothers Corporation of America. MADE IN USA.