Calgary Spiral Staircase

✅ Contemporary spiral staircase available in 120cm or 140cm diameter
🚚 FREE UK Mainland Delivery — securely packaged and tracked

Adjustable floor height system with varnished beech multiplex treads

The Calgary Spiral Staircase is a modern, space-efficient solution for domestic interiors requiring loft, mezzanine or upper-level access. With clean architectural styling and adjustable installation height, it balances practicality with contemporary design.

Technical

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

• No. of Treads: 12 (11 treads + landing platform)

• Tread Material: Multiplex wood with beech veneer

• Structure Material: Powder Coated Steel

• Stair Diameter Options: 120cm or 140cm

• Min Floor Opening Length: 1250mm

• Min Floor Opening Width: 1250mm

• Max Point Load: 200kg

• Max Surface Load: 620kg

• Use Type: Domestic

• Certified to: EN 1991 & EN 1993

• Meets UK Building Regulations: No (optional upgrades available)

• Guarantee: Lifetime Guarantee

Key Benefits

• Two Diameter Options
  Choose 120cm for tighter spaces or 140cm for improved walking comfort.

• Adjustable Floor Height
  Designed to suit floor-to-floor heights between 2.45m and 2.81m using included spacers or tread removal.

• Customisable Rise Height
  Adjustable tread rise between 20.4cm and 23.4cm for tailored installation.

• Solid Beech Multiplex Treads
  35mm thick varnished treads provide durability and scratch resistance.

• Powder-Coated Steel Frame
  Available in White (RAL 9016) or Grey (RAL 9006) for a clean architectural finish.

• Structural Strength
  Tested to 620kg total surface load and 200kg point load capacity.

• Compact Spiral Form
  Efficient footprint ideal for loft conversions and mezzanine access.

• Optional Compliance Upgrades
  Riser bars and middle banister packs available to support UK Building Regulation requirements.

📏 Sizes & Dimensions

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

How Does It Compare?

The Calgary provides structural certification, adjustable installation and premium materials rather than a basic decorative spiral stair kit.

Full Product Overview

The Calgary Spiral Staircase is designed for homeowners who require compact vertical access without sacrificing structural integrity or aesthetic appeal. Its spiral layout minimises footprint while maintaining comfortable tread width — especially in the 140cm diameter option.

Constructed from powder-coated steel and fitted with 35mm thick varnished beech multiplex treads, the staircase delivers long-term durability and refined interior styling. Adjustable rise spacing allows the staircase to suit a range of floor heights between 2.45m and 2.81m.

While not supplied as UK Building Regulation compliant as standard, optional riser bars and additional banister packs can be added where required.

Safety & Build Details

• Powder-coated steel structural frame

• 35mm thick beech multiplex treads

• Adjustable rise configuration

• Banister system tested to 50kg/m horizontal load

• Tested to 620kg surface load and 200kg point load

• Certified to EN 1991 & EN 1993

Final Verdict

The Calgary Spiral Staircase combines compact efficiency with premium structural performance. With adjustable height settings, dual diameter options and a Lifetime Guarantee, it offers a strong, adaptable and visually refined solution for domestic loft and mezzanine access.