Custom Spiral Staircase

Maximum Impact, Minimal Footprint

Footprint from 1.0 m diameter — ideal for tight floor openings
Carbon steel, stainless 316 or powder-coated aluminum options
Open-mesh, timber, glass or stone tread inserts
Modular design: add or remove steps on-site to match slab-to-slab height
Free 3D CAD drawing provided before production confirmation
Ships in flat-pack crates — no specialist crane required

Overview

A helical steel spine that turns a floor connection into a visual centerpiece. Our spiral staircases are engineered in Changzhou to IBC/AS 1657/BS 5395 standards and shipped flat-packed worldwide — ready to install in as little as one day.

Technical Specifications

Specification	Value
Diameter Range	1,000 mm – 2,400 mm (custom available)
Step Height (Riser)	180 mm – 220 mm (code-compliant)
Tread Depth	190 mm – 280 mm (varies by radius)
Floor-to-Floor Height	2,100 mm – 5,000 mm (standard)
Tread Materials	Open-mesh steel / Timber insert / Tempered glass / Stone
Central Column	101.6 mm Ø steel column, wall thickness ≥ 4 mm
Handrail Height	900 mm / 1,000 mm (to IBC or AS 1657)
Structural Load	Designed to 1.5 kN/m² (residential) or 3.0 kN/m² (commercial)
Surface Finish	Hot-dip galvanized / Powder coat / Brushed SS / Painted RAL
MOQ	1 unit
Lead Time	3–5 weeks (standard configs), 6–8 weeks (full custom)
Packing	Flat-pack export crate, all hardware included

Available Configurations

Residential Spiral

Classic helical form with solid timber treads and round steel handrail. Suits 2.4–3.2 m floor-to-floor heights. Available in any RAL color.

Commercial Spiral

Open-mesh galvanized treads, dual handrails, designed to IBC/AS 1657 commercial loading (3.0 kN/m²). Certificate of conformance supplied.

Glass-Panel Spiral

Frameless 10 mm toughened glass infill panels between balusters for a transparent, light-maximizing look. Popular in retail and hospitality.

Frequently Asked Questions

What is the smallest spiral staircase diameter you manufacture?

Our minimum production diameter is 1,000 mm (39 inches). For building-code compliance in most US jurisdictions, a 1,200 mm (48-inch) diameter is recommended to achieve a 7.5-inch minimum clear tread depth at the tread walking line.

Can I adjust the number of steps after installation?

Yes. Our modular tread-and-riser system allows steps to be added or removed without cutting the central column. We ship one or two extra treads with each order at no charge.

Do you provide installation instructions or engineering drawings?

Every order includes a full 3D CAD assembly drawing in DWG and PDF format, a step-by-step installation manual, and a load calculation sheet.

What surface finish options are available?

Standard options: hot-dip galvanized, powder coat in any RAL color, brushed stainless 316 overlay, and bare mild steel. For outdoor installations in coastal climates, we strongly recommend hot-dip galvanized or stainless steel 316 grade components.

Typical Applications

▸Residential loft conversions and mezzanine access
▸Retail store multi-level display fixtures
▸Restaurant mezzanine and rooftop terraces
▸Office feature staircases (meeting floor to exec floor)
▸Boutique hotel rooftop access
▸Industrial plant maintenance access (AS 1657 compliant)

Ready to specify?

Send drawings, dimensions, material preference and destination country for quotation review.

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