Architectural gratings

Spiral stairs

Spiral stairs are a perfect solution when you require a staircase in a confined or limited space where a conventional staircase is not possible. They apply themselves to both indoor and outdoor applications. The simplicity of their structure ensures a fast and cost effective on site installation. Staco offers a large selection of tread designs with a multitude of variants that can be tailor made to suit your requirements.

Technical data:

outer diameters: 1600, 1800, 2000, 2200, 2400, 2600, 2800 i 3000 mm
number of treads for one rotation: 15 - 18
hight: till 6 m standard, in case of higher the static (endurance) calculation is needed
direction of movement: either clockwise or anti-clockwise turn
treads: can be manufactured from any Staco grating
railing type: types 1 - 4


Main advantages of spiral treads:
  • easy and fast erection
  • excellent appearance
  • they do not require much space
  • possibility of matching most of the parameters to individual requirements


Legend:
H - height
D - outer diameter
S - height of tread
d - diameter of base
L - height of bearing pipe above level


Drawings of typical spiral tread stair: 
- stair of 2000 mm diameter spiral treads with 16 stairs for one turn
- stair visual drawing 



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Tools

Strength analysis

uniform load and point load

Air circulation calculation

air circulation for louvre gratings

Staco

specifications

 

 

Staco is a ROTO company