Calgary Anthracite Spiral Staircase

Calgary Anthracite Spiral Staircase

At a Glance

Floor-to-Floor Heights: 2.45 m – 2.81 m

Staircase Diameter Options: 120 cm or 140 cm

Tread Material: Multiplex wood with beech veneer

Structure Material: Powder-Coated Steel (Anthracite RAL 7016)

Maximum Point Load: 200 kg

Maximum Surface Load: 620 kg

Use Type: Domestic

Certified to: EN 1991 & EN 1993

Meets UK Building Regulations: No — optional upgrades available

Guarantee: Lifetime Guarantee

Full Product Overview

The Calgary Anthracite Spiral Staircase combines modern architectural styling with compact space-saving practicality, making it ideal for loft conversions, mezzanine access and contemporary domestic interiors.

Finished in Anthracite Grey (RAL 7016), the powder-coated steel structure delivers a bold, modern appearance while maintaining excellent structural rigidity and long-term durability. Paired with varnished beech multiplex treads, the staircase balances industrial styling with warm natural timber finishes for a refined contemporary look.

Available in either a 120 cm or 140 cm diameter, the Calgary Anthracite can be adapted to suit both tighter spaces and installations where increased walking comfort is preferred. The 140 cm option provides a noticeably wider walking line and more comfortable daily use.

Its adjustable rise system allows installation between floor-to-floor heights of 2.45 m and 2.81 m using supplied spacer rings or tread adjustments, giving installers flexibility during fitting while maintaining a comfortable climbing experience.

Constructed to meet EN 1991 and EN 1993 structural standards, the staircase is tested to a 620 kg total surface load and 200 kg point load capacity, ensuring dependable domestic performance.

Optional riser bars and additional middle banister packs are available for projects where additional safety upgrades or closer alignment with UK Building Regulation requirements may be necessary.

Sizes & Dimensions

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

Key Benefits

Modern anthracite finish
Powder-coated Anthracite RAL 7016 steel structure delivers a sleek contemporary appearance.

Two diameter options available
Choose 120 cm for compact spaces or 140 cm for improved comfort.

Adjustable installation height
Designed for floor-to-floor heights between 2.45 m and 2.81 m.

Customisable tread rise
Adjustable tread spacing allows tailored installation for your project.

Durable multiplex beech treads
35 mm varnished treads provide strength, comfort and durability.

Compact spiral footprint
Efficient use of floor space for lofts and mezzanines.

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

Optional safety upgrades available
Additional riser bars and banister packs available where required.

Final Verdict

The Calgary Anthracite Spiral Staircase delivers modern styling, structural strength and efficient space-saving design in one adaptable staircase system.

With adjustable installation height, premium beech multiplex treads, dual diameter options and a durable Anthracite steel structure, it provides a dependable and visually striking access solution for lofts, mezzanines and contemporary domestic interiors — all backed by a Lifetime Guarantee.