S3W3W33N Double Winder Staircase – Trade Range (Right-Hand, No Handrail)

The S3W3W33N Trade Range right-hand double winder staircase is a practical and space-efficient solution for projects requiring a full 180° turn within a limited footprint.

This layout starts with three straight treads, followed immediately by a continuous six-tread winder turn formed from two three-tread winders back-to-back. The staircase then finishes with three straight treads and the top nosing, creating a smooth and predictable walking route through the turn.

Manufactured to order, this staircase allows 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 geometry is configured to ensure the walking line through the winder section meets or exceeds the going of the straight treads, helping maintain a maximum pitch of 42° in line with UK Building Regulations.

To achieve this, the winder corner dimensions are increased only where required, rather than altering the straight flight, ensuring consistent installation and reliable site dimensions.

This product is supplied without handrails, making it suitable for customers who intend to install their own balustrade or require an open stair configuration.

Stair Layout Explanation (Technical Section)

Layout sequence (Right-Hand turn):
3 straight treads → 6-tread continuous winder turn (180°) → 3 straight treads → top nosing

The turn direction is configured for a right-hand ascent, meaning the staircase turns to the right when travelling upwards.

Key Features

• Right-hand double winder staircase

• Continuous 6-tread winder turn

• Designed for 180° change of direction

• Trade Range construction

• Supplied without handrail

• Suitable for loft conversions and space-restricted layouts

• Manufactured to order

Typical Applications

• Loft conversion staircases

• Attic staircases

• Box stair layouts

• Kite winder staircases

• Space-saving wooden staircases

• Replacement staircases in tight stairwells

Technical Overview

• Total Rise: 2500mm – 2860mm

• Overall Width: 600mm – 1000mm (over strings)

• Minimum Going: 220mm

• Maximum Pitch: 42°

• Configuration: Right-hand winder turn

• Handrail: Not included