800 Model Spiral Staircase

Treads and arrival platform: 45mm
Riser consoles: 19mm
Newels: 54mm X 54mm
Hand Rail: 42mm X 68mm
Floor Rail: 42mm X 20mm
Apron Lining: 14mm X to suit joists
(178mm, 203mm, 229mm)
Nosing: 45mm X 70mm (Rebated to suit 21mm flooring)
Ind Go: 225mm
Diameter: 2104mm
Max Ind Rise: 200mm
Min Square Well: 2270mm
Circular Well: 2216mm

Arrival Platform A side of well or balcony
Arrival Platform B corner of well
Angle of tread 22° 45'

600 Model Spiral Staircase

Treads and arrival platform: 34mm
Riser consoles: 19mm
Newels: 54mm X 54mm
Hand Rail: 42mm X 68mm
Floor Rail: 42mm X 20mm
Apron Lining: 14mm X to suit joists
(178mm, 203mm, 229mm)
Nosing: 34mm X 70mm (Rebated to suit 21mm flooring)
Ind Go: 224mm
Diameter: 1640mm
Max Ind Rise: 200mm
Min Square Well: 1806mm
Circular Well: 1740mm

Arrival Platform A side of well or balcony
Arrival Platform B corner of well
Min ind rise to avoid headroom problems: 190mm
Angle of tread 29°

Spiral Staircase Model

Humphrey spiral staircases are available in 2 sizes - 800 model and 600 model with 800mm and 600mm clear width of stairtread respectively.

Direction of Rotation

Both Models of staircases are available with clockwise or anti-clockwise rotation.

Spindle Pattern

Various designs of spindles are available for use with either model of staircase.

First Floor Exit - Round

Typical Round Configuration with matching balustrading. Various combinations of round or straight balustrading are possible.

First Floor Exit - Square

Square configuration of balustrading. Exits can be shown, to corner, or to side. Various balustrading configurations are possible depending on the entry and exit points of the stair.