Step and Deck East Cape: Manufacturers and installers of precast concrete staircases and suspended flooring



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system descriptions



The Winstep Spiral Stair System may be assembled in a number of different configurations from a set of nine reinforced concrete precast elements.  These elements are fixed together with a bolt, through a central core.  During construction the individual elements are glued together with apoxy adhesive to create a unitary structure, fitting neatly into an 1800x1800mm vestibule.

Winstep Spiral component sets can be supplied for right-hand or left-hand turning stairs (right-hand illustrated) with stair widths of 900mm measured from treadend to post-centre.  The combination of appropriately specified treads allows the construction of square spiral stair between floors and a number of other variants of straight and winder flights, (click on construction notes for diagrams).

The riser height for all variants of the Winstep Spiral Stair System is 200mm providing a minimum head clearance of 1950mm when the stair rotates 180 (360 for a full spiral) between a floor to floor height of 2400mm.  Twelve treads give a total height of 2400mm.  Installations may be designed to allow the upper floor slab to function as a top tread, increasing the floor to floor height to 2600mm.  Greater floor to floor heights may be accommodated by setting the first tread onto an in-situ cast or built up plinth.

The going width of the straight treads is 250mm, and of the winding treads, 250mm at 400mm from the circumference of the central core.  The top front edge of the winding treads is tangential to the circumference of the 150mm diameter central column.





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