Delta Spiral Staircase

Delta Spiral Staircase

At a Glance

Use Type: Domestic (Indoor)

Structure Material: Powder-Coated Steel (Anthracite Finish)

Tread Material: Steel

Number of Treads: 11

Number of Risers: 12

Adjustable Tread Rise: 204 mm – 225 mm

Maximum Floor-to-Floor Height: 3000 mm (3.0 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

Colours Available: Anthracite (Black Tone)

Guarantee: Lifetime Guarantee

Full Product Overview

The Delta Spiral Staircase is designed for modern interiors where compact space-saving access and minimalist architectural styling are equally important.

Constructed entirely from powder-coated anthracite steel, the Delta delivers a clean industrial-inspired appearance while offering excellent durability, structural rigidity and low-maintenance performance. Its all-metal design creates a consistent contemporary finish that works particularly well in loft conversions, mezzanine floors, apartments and modern open-plan interiors.

With its compact spiral layout, the staircase minimises floor space usage while still providing practical and comfortable access between levels. Available in both 1200 mm and 1400 mm diameter options, the Delta can be adapted to suit either tighter installations or spaces where greater walking comfort is preferred.

The staircase features 11 steel treads and an adjustable rise system using spacer rings, allowing installation heights up to 3000 mm while enabling accurate tread spacing between 204 mm and 225 mm.

Its integrated continuous handrail system improves stability and confidence during everyday use, while the modular design allows straightforward installation for domestic projects.

Certified to EN 1991 and EN 1993 structural standards, the Delta Spiral Staircase is tested to a 620 kg total surface load and 200 kg point load, ensuring dependable long-term structural performance.

Sizes & Dimensions

Always measure your finished floor-to-floor height and floor opening before ordering.

Key Benefits

Modern anthracite finish
Powder-coated steel construction delivers a sleek contemporary appearance.

Compact spiral footprint
Ideal for lofts and mezzanines where floor space is limited.

Adjustable rise configuration
Spacer ring system allows accurate installation height adjustment.

Full steel construction
Durable, low-maintenance design with no timber components.

Two diameter options available
Choose 120 cm for compact layouts or 140 cm for greater comfort.

Integrated handrail system
Continuous handrail improves stability and everyday usability.

Strong structural performance
Tested to 620 kg surface load and 200 kg point load capacity.

Designed for contemporary interiors
A minimalist staircase solution with strong architectural styling.

Final Verdict

The Delta Spiral Staircase combines compact efficiency, modern anthracite styling and durable all-steel construction to create a practical and visually striking staircase solution for contemporary interiors.

With adjustable installation height, dual diameter options and certified structural performance, it provides reliable everyday access for lofts, mezzanines and modern living spaces — all backed by a Lifetime Guarantee.