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Wood and Steel Spiral Staircase - Arkè by Fontanot

Kompact Adjustable Staircase Kit

Total Flexibility. 152 Possible Configurations.

Features & Benefits

  • All-in-one complete units
  • Treads, landing, balusters, handrails, hardware and accessories included
  • Nothing to paint, weld, stain or seal
  • In stock for immediate delivery to most US locations


Covered by a worldwide patent, Kompact is the only staircase with adjustable rise, going, height, depth and rotation. Its total flexibility allows endless configurations, with 1 or 2 one quarter turns (L or U) to fit any space. Click here to download a PDF file detailing the many ways the Kompact can be configured. The Kit comes with 13 risers (12 treads) and internal railing. The going is adjustable between 7 and 8 inches and between 8 and 10 inches depending on configurations. The riser is adjustable between 6 and 9 inches.

With the purchase of one or more tread kits you can reach a height of 146 inches. The treads are clear sealed solid beech with metal supports and matching balusters and accessories. The handrail is solid beech. In place of a knee or half wall along your top floor or opening, balcony rail kits of identical materials and finish are available to complete the contemporary appearance of your staircase.

Tech Specs

  • The 74 and 89 numbers are metric for 29 and 35 inches
  • Actual tread length is 27 ½ by 10 ½ deep, or 33 ½ by 12 ¼ deep
  • Treads are clear sealed solid beech wood, 1 5/8 inches thick
  • Metal is 12 gauge steel
  • Handrail is beech wood, 1 ¾ diameter
  • Kompact has a support column that is used under tread 5, 6, or 7
  • Base attachment and “header” attachment can be mounted into wood or concrete. Anchors for concrete are supplied
  • Weight capacity is 1100 pounds

Colors & Installation Types

The Kompact in White
White Gloss Enamel

The Kompact in black
Black Gloss Enamel

The Kompact in Grey
Grey Powder Coat

Installation Video

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