Spiral Steel Staircase | Custom Metal Spiral Stair for Indoor & Outdoor Projects

Short Description:

Royal Steel Group supplies custom spiral steel staircases for global construction, industrial, commercial, and architectural projects. Manufactured from high-quality structural steel such as ASTM A36, Q235B, and Q355B, our spiral staircases offer excellent strength, durability, space efficiency, and reliable load-bearing performance. Available with customized stair diameters, heights, steel treads, handrails, central columns, and surface treatments, they are widely used in warehouses, mezzanine floors, industrial platforms, rooftops, commercial buildings, and residential projects. Custom fabrication, drawing-based production, and third-party inspection are available.

Usage: Outdoor/Indoor

Design Style: Spiral Steel Staircase

Stair Material: Metal

Place of Origin: Tianjin,China

Payment: T/T30% Advance+70% Balance

Delivery Time: 7-15 days

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Product Detail

Product Tags

Product Overview

Royal Steel Group produces spiral steel staircases for the commercial, industrial, residential, warehouse, and architectural applications. Our spiral stair systems offer a unique combination of small space down stairs solution with a strong structural design, which makes it the best choice where traditional straight stairs cover a large portion of floor space.

We offer tailor-made and bespoke spiral stairs based on project dimensions, floor height, load requirements, stair diameter, tread configuration, handrail design and type and conditions of installation.

Product Detail

Item	Specification
Product Name	Spiral Steel Staircase
Material	Carbon Steel / Stainless Steel
Common Steel Grades	ASTM A36, Q235B, Q355B
Standards	ASTM / AISC / Project Specifications
Stair Type	Spiral / Helical Steel Staircase
Tread	Steel Plate / Grating / Checkered Plate
Stringer	Central Column / Custom Structural Support
Handrail	Steel Tube / Pipe / Custom Profile
Surface Treatment	Painted / Powder Coated / Hot-Dip Galvanized
Stair Diameter	Custom
Floor Height	Custom
Tread Width	Custom
Rotation Angle	Custom
Load Capacity	Designed according to project requirements
Fabrication	Cutting, Welding, Drilling, Assembly
Installation	Shop-Fabricated / Knock-Down / Project Installation

What Is a Spiral Steel Staircase?

A spiral steel staircase is a type of vertical circulation where the treads rotate around a center post or structural axis. Due to the shape, spiral stairs can offer access between floors while occupying a fraction of the space of a traditional straight staircase.

They are especially adapted for use in places where space is at a premium such as industrial plants, warehouses, mezzanines, rooftops, platforms and architectural designs.

Key Features & Advantages

1. Space-Saving Design

The compact circular layout makes spiral staircases ideal for areas where floor space is limited. They can provide vertical access without requiring a long stair run.

2. Strong Steel Structure

Structural steel provides high strength and durability, making the staircase suitable for industrial and commercial environments as well as architectural applications.

3. Fully Customizable

Royal Steel Group can customize the overall height, staircase diameter, tread size, handrail, central column, rotation direction, surface treatment, and connection details according to project requirements.

4. Multiple Tread Options

Different tread configurations can be supplied, including:

1). Steel plate treads

2). Checkered steel plate treads

3). Steel grating treads

4). Anti-slip steel treads

5). Custom fabricated treads

5. Corrosion-Resistant Finishes

For outdoor or demanding environments, we can provide hot-dip galvanized, painted, or powder-coated surfaces to improve corrosion resistance and service life.

Steel Staircase Types

Straight Steel Stairs – Ideal for factories, huses, offices and industrial applications.

L-Shaped Steel Stairs – An ideal choice for space constrained installation environment.

U-Shaped Steel Stairs – Appropriate for industrial access systems and multi story buildings.

Spiral Steel Stairs – Small space design for floor space is at a premium.

Stairs with Steel Platforms - Built for the industrial platform, equipment access and maintenance areas.

Grating Stairs – Perfect for factory and outdoor applications with drainage and anti-slip requirements.

Straight Steel Stairs

L-Shaped Steel Stairs

U-Shaped Steel Stairs

Spiral Steel Stairs

Stairs with Steel Platforms

Grating Stairs

Stair Tread Options

1.Steel Grating Treads

Open-grid grating provides good drainage and ventilation and is widely used in industrial and outdoor environments.

2.Checkered Steel Plate Treads

Raised patterns provide improved surface traction and are suitable for industrial and commercial stairways.

3.Plain Steel Plate Treads

A solid tread option suitable for enclosed staircases and general structural applications.

Black-Steel-Plate-Carbon-Steel-Tread-Plate

Steel Grating Treads

Checkered Steel Plate Treads

Plain Steel Plate Treads

Steel Stair Customization Process

Royal Steel Group is proud to be your source for drawing-based custom fabrication. Send us your architectural/structural drawings and our production team will fabricate the staircase components in accordance with the approved design.

Custom options include:

Custom Item	Available Options
Stair Diameter	Custom according to available space
Total Height	Custom according to floor-to-floor height
Tread	Plate / Grating / Checkered Plate
Central Column	Custom diameter and thickness
Handrail	Round Tube / Square Tube / Custom
Balusters	Steel Tube / Bar / Custom
Surface	Painted / Powder Coated / Galvanized
Rotation	Clockwise / Counterclockwise
Connection	Welded / Bolted / Combination

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Surface Finish

Conventional Surfaces

Galvanized Steel Stairs

Spray Paint Steel Stair

Main Applications

Industrial Buildings – Factories, workshops, warehouses and processing plants.

Business Buildings - Office complexes, retail malls, commercial buildings, and public buildings.

Steel Structures – PEB steel buildings, mezzanine floor systems and steel access systems.

Industrial Platforms – Platforms for machinery, maintenance platforms and production sites.

Emergency & Alternate Access - External access stairs, utility stairs, and fire escapeazines.

Infrastructure Projects – Sites for construction, factories, and other industrial infrastructures.

ErecaStep-custom-color-powder-coated-rooftop-stair-1024x706

Why Global Buyers Choose Royal Steel Group

Custom Design & Fabrication – Staircases manufactured according to drawings and project dimensions.

Quality Structural Steel – ASTM A36 and other suitable steel grades available.

Space-Efficient Solutions – Compact spiral design for areas with limited floor space.

Multiple Surface Finishes – Painting, powder coating, and hot-dip galvanizing available.

Precision Fabrication – CNC cutting, drilling, welding, and dimensional inspection.

Complete Components – Treads, central columns, handrails, balusters, and connection components.

Project Supply Capability – Suitable for contractors, steel fabricators, distributors, and construction projects.

Export Experience – Professional packing and international shipping support.

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Packaging & Shipping

The parts of the spiral staircase can be pre-assembled or delivered as separated parts according to transport and assembly needs.

The components are tightly packed and protected during loading. Export packaging options are available to suit container bulk or project shipment.

ABOUT US

Royal Steel Group is a modern enterprise integrating steel structure research and development, design, manufacturing, and installation. We provide end-to-end solutions for industrial plants, logistics warehouses, commercial buildings, and public infrastructure, from conceptual design and precision manufacturing to on-site installation and after-sales support. Adhering to the philosophy of "Quality First, Customer Satisfaction," we deliver safe, reliable, and efficient projects with advanced equipment, experienced engineers, and a rigorous quality control system. Our professionalism and consistently high quality have earned the trust and recognition of customers throughout China.