large span steel structures
Span: A span of 30 meters or more is usually defined as a large - span steel structure. The common span range is 30 - 100 meters, and in some special projects, it can reach hundreds of meters. The size of the span directly determines the structural form and component dimensions.
Steel Strength: High - strength steels are mostly selected, such as Q390, Q420 and above grades, to meet the high requirements for structural bearing capacity under large - span conditions. These steels have high yield strength and tensile strength, which can effectively reduce the cross - sectional dimensions of components and reduce the self - weight of the structure.
Structural Forms: Common forms include truss structures, grid structures, lattice shell structures, cable - stayed structures and membrane structures. Truss structures have clear force - bearing characteristics and are suitable for various building types; grid and lattice shell structures have good spatial force - bearing performance and beautiful shapes; cable - stayed structures and membrane structures have unique mechanical properties and architectural expressiveness.
Product Advantages
Creation of Large Spaces: It can achieve huge column - free spaces, providing open venues for various large - scale events, industrial production, warehousing, etc., greatly meeting the architectural functional requirements for special spatial scales, such as large - scale stadiums, exhibition halls, aircraft hangars, etc.
Superior Mechanical Properties: The good strength and toughness of steel make large - span steel structures perform well in bearing self - weight, wind load, snow load and live load. Through reasonable structural design, the load can be effectively dispersed, and the overall stability and seismic performance of the structure can be improved.
Diverse Architectural Shapes: The rich structural forms provide a broad creative space for architectural design, enabling the creation of unique and novel building appearances, meeting the pursuit of the combination of aesthetics and function in modern architecture and becoming iconic urban buildings.
Selling Points Concerned by Purchasers
Customized Design: According to the specific needs of purchasers, such as building use, site conditions, budget constraints, etc., a large - span steel structure solution is customized. From structural selection, joint design to material selection, all - around personalized requirements are met to ensure the uniqueness and applicability of the project.
Balance of Cost - effectiveness: Although large - span steel structures have a high technical content, the cost can be effectively controlled through optimized design, selection of appropriate materials and advanced construction techniques. The fast construction progress can reduce costs such as labor and equipment rental, and the structure has good durability and low long - term maintenance costs, achieving a good balance between cost and benefit.
Professional Technical Support: There is a professional design, construction and management team with rich experience in large - span steel structure projects. From project planning, design to construction, installation and later maintenance, full - process technical support is provided to ensure the smooth implementation of the project and relieve purchasers of their concerns.
Large Span Steel Structures – Enterprise-Grade Solutions by Shenyang Zhongda
Product Description
When your project demands column-free spaces exceeding 30 meters, large span steel structures from Shenyang Zhongda deliver proven engineering excellence. Our systems span 30–100+ meters using high-strength steels (Q390/Q420 grade) with yield strengths above 345 MPa, supporting applications from industrial warehouses to iconic stadiums. With an 80,000-ton annual fabrication capacity across our 75,000 m² facility, we've successfully delivered 60+ landmark projects including the 18,000-ton Dongta Bridge. Our truss, grid, and lattice shell configurations achieve span-to-depth ratios that reduce structural self-weight by 20–30% compared to traditional systems, while precision CNC drilling (±0.1 mm tolerance) ensures every connection performs flawlessly under dynamic loads.
Product Advantages
Unobstructed Space Creation
You gain maximum functional flexibility with column-free interiors reaching hundreds of meters. Our structures eliminate spatial constraints, perfect for exhibition halls, aircraft hangars, or logistics centers requiring uninterrupted workflows.
Superior Load Management
High-strength steel offers exceptional performance under combined wind, snow, seismic, and live loads. Through FEM analysis and optimized geometry, we distribute forces efficiently, ensuring stability even in high-seismic zones.
Design Versatility
Choose from trusses, space frames, cable-stayed, or membrane systems. Each configuration supports unique architectural visions while maintaining structural integrity. Our BIM-based workflows bring your concepts to life with precision.
Rapid Construction
Prefabricated modules reduce on-site labor by 40% and cut project timelines by 20–30%. You'll minimize equipment rental costs and accelerate revenue generation with our streamlined installation processes.
Long-Term Durability
C5-M grade anti-corrosion coatings extend service life beyond 50 years. Recyclable steel components align with your sustainability goals while maintaining low lifecycle maintenance costs.
Specifications & Customization
|
Parameter |
Standard Range |
Customization Options |
|
Span Length |
30–100 meters |
Up to 200+ meters for mega-projects |
|
Steel Grade |
Q355B, Q390, Q420 |
Q460, weathering steel (Corten), stainless steel |
|
Structural Forms |
Truss, grid, lattice shell |
Cable-stayed, membrane, hybrid systems |
|
Column Spacing |
6–12 meters |
Custom layouts per site conditions |
|
Roof Load Capacity |
0.5–2.0 kN/m² (live) |
Heavy snow/equipment loads up to 5.0 kN/m² |
|
Deflection Limit |
Span/240 to Span/360 |
Pre-camber adjustments for stricter requirements |
|
Connection Type |
High-strength bolts (Class 10.9) |
Welded nodes, spherical joints for space frames |
|
Corrosion Protection |
Hot-dip galvanizing + epoxy coating |
Marine-grade systems for coastal/corrosive environments |
|
Fabrication Tolerance |
±0.1 mm (CNC drilling) |
Ultra-precision for complex 3D geometries |
|
Delivery Format |
Modular prefabrication |
Site-specific pre-assembly for fast installation |
Your Unique Requirements Matter
We tailor every aspect—from joint design to material chemistry—to match your budget, site constraints, and performance criteria. Our 3-axis CNC systems handle ultra-thick plates up to 300mm, accommodating heavy industrial applications.
Manufacturing & Quality Control
World-Class Production Capacity
Operating from a 120,000 m² facility in Shenyang, our 75,000 m² workshops house 50-ton cranes and 1200-ton plate rolling machines. This infrastructure enables us to fabricate large span steel structures with components weighing up to 18,000 tons per project.
Precision Engineering
· CNC Cutting Lines: Process plates up to 300mm thick with minimal thermal distortion
· 3-Axis Drilling Systems: Achieve ±0.1 mm hole positioning for perfect bolt alignment
· Automated Welding: Reduce human error while meeting AWS D1.1 and EN 1090 standards
Rigorous Inspection Protocols
Every component undergoes:
· Ultrasonic Testing (UT): Detects internal weld defects
· Magnetic Particle Inspection (MPI): Ensures surface integrity
· Dimensional Verification: Laser measurement confirms geometric accuracy
· Load Testing: Selected assemblies prove design calculations before shipment
Certifications You Can Trust
· ISO 9001 (Quality Management)
· ISO 14001 (Environmental Compliance)
· ISO 45001 (Occupational Health & Safety)
· EN 1090 Execution Class 3 (European Standards)
· Class I Steel Structure Professional Contracting Qualification (China)
Project Cases / Success Stories
Shenyang Dongta Cross-Hunhe River Bridge
Challenge: Spanning a major river required an 18,000-ton steel structure with strict deflection controls and seismic resilience.
Solution: Our team designed and fabricated a multi-span truss system using Q420 steel, completing the project 25% faster than industry averages.
Result: The bridge now handles 80,000+ vehicles daily with zero structural maintenance issues after 5+ years.
Jingha Expressway Expansion
Challenge: Limited construction windows demanded rapid deployment of large span steel structures for toll plaza canopies and service buildings.
Solution: Prefabricated modules were assembled on-site within 60 days, minimizing traffic disruptions.
Result: The client achieved on-time project delivery while reducing overall costs by 18% through our optimized workflows.
Industrial Warehouse Complex (Liaoning Province)
Challenge: A logistics operator needed 45-meter clear-span warehouses to maximize storage density.
Solution: Grid structures with spherical nodes provided column-free interiors while supporting heavy rooftop HVAC equipment.
Result: The client increased storage capacity by 35% compared to conventional column layouts.
These projects demonstrate our ability to execute complex large span applications across infrastructure and industrial sectors.
Compliance & Certifications
Your projects demand adherence to international standards. We deliver full compliance with:
· EN 1090 (European Steel Execution)
· AISC 360-16 (US Structural Steel Buildings)
· AWS D1.1 (Welding Code – Structural)
· GB 50017 (China Steel Structure Design Standards)
· Eurocode 3 (Design of Steel Structures)
Documentation Support:
Material Test Certificates (MTC), English technical drawings, NDT reports, and load test documentation accompany every shipment. Our experience with Belt and Road Initiative projects ensures seamless integration with global EPC workflows.
Frequently Asked Questions
Q: How do you manage thermal expansion in spans over 100 meters?
A: We incorporate PTFE slide bearings and expansion joints at support points. Thermal load simulations during design ensure the structure accommodates seasonal temperature variations without inducing stress.
Q: What's the typical lead time for a 60-meter span project?
A: Design and fabrication require 8–12 weeks, depending on complexity. Modular delivery and on-site assembly add 3–6 weeks. Our optimized workflows reduce timelines by 20–30% versus industry norms.
Q: Can you retrofit existing structures to increase load capacity?
A: Absolutely. We add reinforcement plates to truss chords or upgrade connections using high-strength bolts. A structural assessment verifies foundation capacity before modifications.
Q: What maintenance do these structures require?
A: Visual inspections every 3–5 years focus on bolted connections and coating integrity. Touch-up painting every 15–20 years maintains corrosion protection. Properly maintained systems last 50–75 years.
Q: How do you ensure seismic performance?
A: We use pre-qualified moment connections and design ductile plastic hinges per seismic codes. Energy dissipation through controlled yielding prevents catastrophic failure during earthquakes.
Contact Us
Ready to discuss your large span steel structures project? Our engineering team is here to transform your requirements into cost-effective solutions.
Email: postmaster@zd-steels.com
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