Quarter-turn staircase with modular central modular stringer (wooden frame and steps)
GAMMA RINTAL

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  Quarter-turn staircase with a central stringer (metal frame and wood steps)
  KNOCK BASIC
  
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  Quarter-turn staircase with a lateral stringers (metal frame and wood steps)
  METROPOL
  
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  Quarter-turn staircase for small spaces
  MINI PLUS
  
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  Quarter-turn staircase with a central stringer (metal frame and wood steps)
  KNOCK WOOD
  
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  Quarter-turn staircase with a lateral stringers (wooden frame and steps)
  TRASFORMA
  
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  Quarter-turn staircase with a central stringer
  PRIMA by Giugiaro Architettura
  
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  Quarter-turn staircase with a central stringer (metal frame and wood steps)
  KNOCK DESIGN
  

Half-turn staircases

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  Half-turn staircase with a lateral stringers
  (wooden frame and steps)
  TRASFORMA
  
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  Half-turn staircase with a lateral stringers
  (wooden frame and steps)
  GARA
  
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  Half-turn staircase with a central stringer
  ARAYA OLD
  

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  Helicoidal staircase with lateral stringers (wooden frame and steps)
  GAMMA
  
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  Circular staircase with lateral stringers (metal frame and wooden steps)
  MONOLAMA SPIRAL
  
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  Helicoidal staircase with central stringer
  (metal frame and wooden steps)
  KNOCK BASIC
  
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  Helicoidal staircase with central stringer
  (metal frame and wooden steps)
  PRIMA by Giugiaro Architettura