Overview
Assembled truss decking is a composite structural system combining steel and concrete to create efficient floor and roof slabs. It integrates profiled steel sheets with welded wire trusses, which are later filled with concrete on-site. This system eliminates the need for traditional formwork, significantly speeding up construction. The modular design allows for easy transportation and quick assembly, making it ideal for large-scale projects. It is widely adopted in warehouses, parking garages, and multi-story buildings due to its cost-effectiveness and structural reliability. The steel-concrete synergy ensures durability while reducing overall weight.
Structure and Working Principle
The decking consists of three main components: a galvanized steel base sheet, pre-welded steel trusses for reinforcement, and poured concrete. The steel sheet acts as permanent formwork and tensile reinforcement, while the trusses provide shear resistance and stabilize the concrete layer. During installation, the panels are laid across steel beams and secured with screws or welding. Concrete is then poured over the assembly, bonding mechanically with the embossments on the steel sheet. The system distributes loads evenly, with the steel resisting tension and the concrete handling compression.
Key Features
High load-bearing capacity is a standout feature, with spans reaching up to 6 meters without intermediate supports. The system also offers excellent fire resistance, as the concrete layer protects the steel from high temperatures. Other advantages include acoustic insulation, vibration damping, and adaptability to mechanical/electrical installations. The open rib design allows for easy routing of pipes and ducts. Additionally, the prefabricated nature reduces on-site labor and material waste compared to conventional methods.
Application Areas
This decking is prevalent in industrial facilities like factories and logistics centers, where long spans and heavy loads are common. Commercial applications include shopping malls, offices, and hospitals requiring fast-track construction. It is also used in residential high-rises and parking structures due to its durability and cost efficiency. The system suits both new builds and retrofits, particularly in projects with tight deadlines. Specialized versions are available for seismic zones or corrosive environments.
Maintenance and Precautions
Post-installation, inspect for proper concrete coverage over trusses and ensure no voids are present. Regular checks for corrosion are recommended in humid or coastal areas, though galvanized sheets typically resist rust. During installation, avoid walking on uncured concrete or overloading the deck. Use edge formwork to prevent leakage during pouring. For maintenance, clean debris from drainage channels and repair any damaged concrete sections promptly to maintain structural integrity.
B2B Procurement Guide
When sourcing assembled truss decking, verify supplier certifications (e.g., ISO 9001) and request test reports for load capacity and fire performance. Bulk orders (500+ sqm) often qualify for 10-15% discounts. Key specifications to confirm include steel thickness (0.8-1.5mm common), truss height (70-120mm), and concrete grade (typically C25-C30). Lead times vary from 2-4 weeks; expedited production may incur 20-30% surcharges. Consider suppliers offering design support to optimize panel layouts and reduce waste.
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