Williams Brothers Corporation of America Defining Quality One Access Door at a Time

Toll Free: 800-255-5515

Toll Free: 800-255-5515

WB Super Simplex Disappearing Stairway

Disappearing Attic or Roof Access Ladder.

Construction Features:
  • Customized to meet most job conditions
  • Built to the exact finished ceiling and floor/roof deck heights
  • Meets requirements of A.N.S.I. A14.9 for commercial or residential use
  • Test weight of 500 lbs.
  • Individual tread test weights of 1000 lbs.
  • Actual shear of rivets tested to 1175 lbs.
  • 11 ga. formed steel frame
  • Extruded aluminum treads and side rails
  • 5 3/16” tread depth
  • Can accommodate ceiling heights up to 13' 6"
OPTIONS: (AT EXTRA COST)
  • Units available for both non-rated and fire rated ceilings
  • Lock on door panel (std on fire-rated units)
  • Special Deep Box and Deep Angle frames to accommodate dropped ceilings
  • 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
  • Fold-Assist (standard on units 9' 10" and taller)
  • 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
  • Fire rated
  • Non-rated
 

Williams Brothers Corporation
Corporate Office
1330 Progress Drive
Front Royal, Virginia 22630

Western Distribution Center
Reno Nevada 

Toll Free Phone 800 255-5515
Phone 540 636-4444
Toll Free Fax 800 822-5001
Fax 540 636-4455

Toll Free Phone 800 255-5515
Phone 540 636-4444
Toll Free Fax 800 822-5001
Fax 540 636-4455

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