Curved & Helical Staircase

Grand Sweep. Bespoke Engineering.

True curved structure: no straight-segment approximation
Helical handrail cold-bent to continuous radius — no visible joints
Width from 1,000 mm to 3,000 mm (custom)
Compatible with straight run at top or bottom (hybrid designs)
Glass, stainless cable, or wrought-iron spindle balustrade options
Formal quotation within 48 hours from architectural DWG submission

Overview

A sweeping curved staircase is the defining architectural element of grand residential foyers, hotel lobbies, and flagship retail stores. Our helical staircases are built to exact architectural drawings — every tread individually cut and fitted to the radius of your plan.

Technical Specifications

Specification	Value
Radius Range	1,200 mm – 6,000 mm inner radius (custom)
Stair Width	1,000 mm – 3,000 mm
Rise Height	150 mm – 190 mm (grand stair proportions)
Tread Depth	280 mm – 400 mm (at walking line)
Structural System	Curved plate stringer / helical beam / concrete-on-steel pan
Handrail	Continuous cold-bent stainless or mild steel tube, no joints
Tread Finish	Marble / Timber / Stone / Porcelain / Carpet-on-steel-pan
Surface Finish	Powder coat RAL / Brushed SS 316 / Bronze PVD / Custom
Design Input Required	Architectural DWG (DWG/DXF format) or detailed PDF sketch
MOQ	1 unit
Lead Time	8–14 weeks (dependent on complexity and tread material)
Factory Acceptance Test	Full dry-assembly in factory before shipment, photos provided

Available Configurations

Curved Plate Stringer

Continuous curved steel plate forms the structural spine. Cost-effective for medium radii (1,500–3,000 mm). Suitable for residential and boutique hospitality.

Helical Beam (Box Section)

Structural RHS box beam cold-bent to radius. Superior load capacity for wide commercial staircases. Required for widths over 1,800 mm.

Cascading Curved (Double Stringer)

Dual curved stringers for staircases requiring no visible structural spine — treads appear to cascade from wall to wall. Classic grand hotel entrance form.

Frequently Asked Questions

What design information do you need to quote a curved staircase?

We need: (1) Inner and outer radius, (2) Total floor-to-floor height, (3) Stair width, (4) Preferred tread material, (5) Balustrade style. An architectural CAD file (DWG/DXF) is ideal but a dimensioned PDF sketch is sufficient to start.

How do you ship a curved staircase internationally?

Curved staircases are disassembled into sections — stringers, individual treads, handrail segments, and balustrade components — and packed in custom timber export crates with foam protection.

Can you match an existing material or finish already in the building?

Yes. We regularly match existing materials: same timber species for treads, matching RAL color codes for metalwork, and similar stone finishes. A physical color/finish sample is shipped for approval before production.

Typical Applications

▸Private villa and estate grand entrance foyers
▸5-star hotel lobby feature staircases
▸Cruise ship and superyacht interior staircases
▸High-end retail flagship stores (fashion, jewellery, automotive)
▸Penthouse apartments and duplex lofts
▸Performing arts centers and cultural buildings

Ready to specify?

Send your drawings and get a fixed-price quote in 48 hours.

Request a Quote

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