Columbia Spiral Staircase

Columbia Spiral Staircase

At a Glance

Use Type: Domestic (Indoor)

Structure Material: Powder Coated Steel (Basalt Grey)

Tread Material: Solid Oak

Tread Finish: Varnished

Number of Treads: 13

Tread Thickness: 40 mm

Adjustable Tread Rise: 205 mm – 225 mm

Floor-to-Floor Height Range: Up to 3150 mm (3.15 m)

Staircase Diameter Options: 1200 mm or 1400 mm

Minimum Floor Opening Length: 1250 mm

Minimum Floor Opening Width: 1250 mm

Maximum Point Load: 200 kg

Maximum Surface Load: 620 kg

Building Regulation Compliance: Yes

Guarantee: Lifetime Guarantee

Full Product Overview

The Columbia Spiral Staircase is a premium interior staircase designed for homes and architectural spaces where both aesthetics and structural quality are essential. Combining solid oak treads with a basalt grey powder-coated steel structure, it delivers a refined modern appearance while maintaining exceptional durability and strength.

Its compact spiral footprint makes it ideal for loft conversions, mezzanines and space-conscious interiors, while still creating a striking architectural focal point. The staircase features 13 solid oak treads with adjustable riser heights between 205 mm and 225 mm, allowing greater installation flexibility to suit a wide range of floor-to-floor heights up to 3.15 m.

A square landing platform improves usability and adaptability during installation, making it suitable for different ceiling openings and room layouts. The modular construction also simplifies assembly without compromising structural rigidity.

Designed to comply with EN 1991 and EN 1993 structural standards, the Columbia Spiral Staircase combines premium materials, flexibility and long-term reliability for high-end residential interiors.

Key Benefits

Premium solid oak treads
High-quality oak construction delivers excellent durability, strength and a luxurious finish.

Modern basalt grey steel structure
Powder-coated steel frame provides a contemporary architectural appearance with long-term corrosion resistance.

Compact spiral footprint
Ideal for interiors where floor space is limited but visual impact remains important.

Adjustable tread rise system
Allows precise installation adjustment between 205 mm and 225 mm riser heights.

Square landing platform
Improves practicality and installation flexibility for different layouts.

Modular installation design
Engineered for easier assembly while maintaining structural integrity.

Sizes & Dimensions

Choose this staircase if you need a premium spiral staircase with solid oak construction, compact design and a high-end architectural finish.

Final Verdict

If you’re looking for a stylish and high-quality spiral staircase for a loft, mezzanine or modern interior, the Columbia Spiral Staircase is an outstanding choice. Combining solid oak craftsmanship, a durable steel structure and flexible installation features, it delivers premium performance with striking visual appeal — backed by a Lifetime Guarantee.