S3W3W33N L/H Trade Range Double Winder Staircase – Custom Made

The S3W3W33N winder staircase is a space-efficient layout designed for tight stairwells where a straight flight cannot be accommodated.
This model features 3 straight treads, followed by a continuous 6-tread winder turn made up of two 3-tread winders back-to-back (a lower 3-tread winder immediately followed by an upper 3-tread winder), then 3 straight treads, finishing with the top nosing.

Each staircase is made to order, allowing the total rise to be set between 2500mm and 2860mm, with overall widths from 600mm to 1000mm measured over the face of the strings.
The winder geometry is configured to maintain a safe and comfortable route through the turn by ensuring the walk-line going through the winder section meets or exceeds the going on the straight section, helping keep the stair pitch within 42° in line with UK Building Regulations.

To achieve this, the winder corner dimensions are adjusted only where required to meet the walk-line going requirement, without changing the straight flight going unless you choose to override it manually.

This model will be available in left-hand and right-hand versions, with handrail and material specifications depending on the selected product variant.