Double-layer Factory Building

In modern industrial and commercial operations, efficient land and space utilization is key to reducing costs and increasing efficiency. Canglong’s double-layer factory building is the ultimate solution tailored for you, perfectly realizing the core value of multiplying space by utilizing a single site.

Structural & Interior Composition

The Canglong double-layer steel factory building is engineered around a rigid portal frame system, optimized for industrial loads and vertical space utilization.

Main Structural Frame

• Primary Columns & Beams: High-strength Q355B welded H-section steel, designed for rigid-frame or pinned-base connections depending on seismic and wind load requirements.
• Secondary Framing: Q235B galvanized C/Z purlins and girts form a lightweight yet robust support grid for wall and roof panels.
• Floor System (2nd Level): Composite steel decking with concrete topping or grating platforms, engineered for 300–500 kg/m² live load as standard; upgradable to 1,000+ kg/m² for heavy equipment.
• Bracing System: Cross-bracing or portal bracing in both longitudinal and transverse directions ensures lateral stability against wind and seismic forces.

Enclosure & Interior Finishes

• Wall & Roof Panels: PU, rock wool, or EPS sandwich panels (50mm–200mm thickness), selected based on climate, fire rating, and thermal performance needs.
• Surface Treatment: Hot-dip galvanization ≥80μm or multi-layer anti-corrosion paint system, ensuring 50-year design life even in coastal or humid environments.
• Interior Layout: Column-free or wide-span interiors allow flexible partitioning. The first floor is ideal for heavy production and material flow; the second floor suits light assembly, QC labs, offices, or inventory mezzanines.

Technical Specifications

Advantages of Double-Layer Steel Structure Factory Buildings

Maximize Space Utilization

Through innovative vertical space design, the effective usable area is easily doubled within the same footprint. The first floor can be used for heavy production, equipment installation, or raw material storage, while the second floor can be used for light assembly, offices, product showrooms, or logistics sorting centers. This vertical division of functions facilitates a smoother production process.

Sturdy, Safe, and Reliable Structure

The main frame is constructed of high-strength H-shaped steel (such as Q355), which offers excellent mechanical properties and strong load-bearing capacity, ensuring overall stability and superior earthquake and wind resistance. Galvanized C-shaped steel purlins form a lightweight yet strong secondary structure system, ensuring long-term safety.

Fast, cost-effective construction

All steel components are prefabricated in the factory, ensuring high precision and controlled quality. Only standardized assembly is required on-site, making construction significantly faster than traditional concrete construction. This significantly shortens your return on investment, allowing you to commence operations faster and seize market opportunities.

Excellent enclosure system performance

Rock wool sandwich panels, PU sandwich panels, or EPS sandwich panels can be selected for wall and roof panels, tailored to your needs. These materials offer excellent thermal insulation, fire resistance, sound insulation, and moisture resistance, creating a more comfortable working environment for employees while providing stable storage conditions for precision equipment and specialized goods.

Flexible customization, adaptable to the future

The double-story steel structure factory building offers tremendous design flexibility. Span, column spacing, and floor height can all be customized. The spacious interior allows for flexible partitioning and renovation to accommodate future business changes, offering strong scalability and adaptability.

Canglong Exclusive Advantages

In-House Engineering — No Outsourced Drawings

Every double-layer factory building is modeled in Tekla Structures 3D by Canglong’s own structural engineering team (15+ licensed engineers). This eliminates fit errors during assembly and allows real-time design adjustments based on your local building codes.

Factory Pre-Assembly Before Shipping

At our 1,332,000㎡ ISO-certified production base in Henan, China. You receive numbered components that bolt together on-site — no field cutting or welding required for standard connections.

Full-Package EPC Support

Canglong doesn’t just sell steel kits. We deliver structural calculations, foundation drawings, container loading plans, and remote installation guidance as standard. For complex projects, we can dispatch an on-site engineer to supervise assembly.

Global Project Portfolio

We have completed double-layer and multi-storey steel structures in Zambia, Ghana, Chile, Thailand, the Philippines, and Romania. Each project is documented with photos, dimensions, and client-verified performance data. Browse our project gallery →

Applicable Scenarios

Manufacturing and Processing: Small and medium-sized machinery manufacturing, automotive parts, and home appliance assembly. The first floor handles heavy machining and raw material intake; the second floor supports sub-assembly and quality control stations.

Warehousing and Logistics: E-commerce distribution centers, high-bay warehouses, cold chain storage, etc. First floor for receiving, sorting, and dispatch; second floor for slow-moving inventory or climate-controlled storage.

Comprehensive Use: Front-of-house and back-of-house facilities, integrating R&D and production, and display and warehousing. Ideal for showrooms on the ground level with production or stock management upstairs — common in automotive 4S centers and industrial parks.

Production Capacity & Delivery

Manufacturing Scale

• Production Base: 1,332,000㎡ factory in Henan Province, China, with 6 automated H-beam welding lines and 4 CNC cutting stations.
• Monthly Output: 50,000+ tons of fabricated steel components.
• Quality Control: 100% dimensional inspection + random ultrasonic weld testing. All materials sourced from certified mills (Baosteel, Ansteel).

Certifications & Compliance

• ISO 9001:2015 Quality Management
• ISO 14001:2015 Environmental Management
• CE EN 1090-1 Steel Structure Execution Class 2
• GB/T 19001 Chinese National Quality Standard

Delivery Timeline

Expedited production available for urgent projects. Contact our sales team for a project-specific schedule.

Related Products & Reference Projects

You May Also Need

• Standard Single-Story Factory Building — For heavy production with ground-level crane operations.
• Multi-Storey Factory Building — Three or more floors for dense urban industrial sites.
• Factory Building with Overhead Crane — Integrated crane runway beams up to 20-ton capacity.
• Steel Structure Warehouse — Large-span, single-floor storage optimized for logistics.

Reference Projects — Double-Layer & Multi-Storey

• Zambia Mezzanine Warehouse — Two-level steel warehouse with office mezzanine.
• Philippines Two-Story Warehouse — Ground-floor storage + second-floor packaging and dispatch.
• Costa Rica Two-Story Warehouse — Tropical climate design with enhanced ventilation and PU insulation.
• Thailand Industrial Plant — Multi-span double-layer structure for automotive parts manufacturing.

Need a custom design for your site? Request a free structural design and quotation →

Frequently Asked Questions

• The first and largest steel structure & sandwich panels factory in north of China.
• 20 years experience direct factory with competitive price, stable and controllable quality.
• Over 100 million dollars of annual output.
• More than 100000m2 production industrial park.
• One stop service from design to installation.
• 10 units free 3D designs & 10 units design structural drawings per day.
• Professional installation teams in 30+ countries.
• CE,ISO certificates.
• Supply quality guarantee for 15 years.
• Cooperating with 100+ countries & 2000+ partners.