Prefabricated Stair Systems | Prefab Stairs | Prefabricated Stairs

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All Panel Built prefabricated stair systems, handrails and components are engineered, fabricated and powder coat painted at our plant for a lasting finish and fast delivery. Each set of prefabricated stairs is manufactured to your specification allowing for fully-custom stair sizes, heights, layouts, widths, treads, and specialty metal handrail that meets OSHA and/or IBC codes.

Prefabricate Stair Options

  • IBC Business, IBC Factory or OSHA
  • Powder Coated or Galvanized Steel Stairs
  • Steel Diamond Plate Treads
    (Grip-Strut, Bar Grate)
  • 1/2 Square Tube Handrail
  • Code Compliant for Self
    Supported Landing
  • Opened and Closed Risers
  • 48’ x 48’ and 56’ x 56’ landings
  • Interior and Exterior Rated Prefabricated Stair Systems

Differences Between IBC and OSHA stair codes


IBC Stairs have a horizontal run that is approximately 1.5 times the deck height, not including landings or handrail extenders, so a 10’ high mezzanine deck would have an approximate 15’long stairwell.


With OSHA Stairs the horizontal run and the length of the stairwell, is approximately equal to the height of the deck. For instance if the mezzanine deck height is 10’, the stairwell is 10’ long.

Prefabricated Stairs Installation Guide


Panel Built modular offices and mezzanines are 100% relocatable and expandable. Because they are made onsite, our prefab stair systems are ready 40 percent faster than stick-built.

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Call For Modular Building Solutions 800.636.3873