Steel-Truss Composite Floors for High-Load Buildings
Structural Innovation and Load-Bearing Efficiency
Steel-truss composite floors represent a significant advancement in structural engineering, combining the tensile strength of steel trusses with the compressive resistance of concrete to create floors capable of supporting extreme loads exceeding 10 kN/m². Jiangsu Dunbon Steel Structure utilizes custom-designed truss profiles with depths ranging from 200mm to 600mm, optimized through finite element analysis (FEA) to match specific project requirements. The composite action between steel and concrete is achieved through shear connectors welded to the top chord of the trusses, typically spaced at 150-300mm intervals. This system allows for longer spans up to 18 meters without intermediate supports, creating flexible interior layouts for industrial plants and heavy-duty facilities. The company's proprietary connection details ensure full moment resistance at beam-column junctions, critical for maintaining structural integrity under dynamic loading conditions.
Material Optimization and Fabrication Precision
The manufacturing process for steel-truss composite floors involves precision engineering at every stage. Dunbon employs high-strength steel (Q345B/Q420) for truss members, with concrete slabs typically using C30-C40 grade concrete reinforced with welded wire mesh. The company's automated production line ensures accurate cutting and welding of truss components, with dimensional tolerances maintained within ±3mm. For the Shanxi Pacific Huitong Tower project, Dunbon developed a specialized jig system for mass production of identical truss units, achieving 95% fabrication accuracy. The integration of galvanized steel decking serves as permanent formwork while providing corrosion protection, with the decking profile designed to maximize bond with the concrete slab. This systematic approach reduces material waste by approximately 15% compared to traditional construction methods.
Installation Efficiency and Performance Verification
The installation process for steel-truss composite floors emphasizes speed and quality control. Dunbon's projects typically achieve erection rates of 1,000-1,500 m² per day through modular installation sequences. The company uses laser scanning and photogrammetry to verify alignment during installation, ensuring the completed floor meets flatness tolerances of L/360 under live loads. For the Ethiopia Industrial Park project, Dunbon implemented a just-in-time delivery system where truss modules arrived sequenced according to installation requirements, reducing onsite storage needs by 60%. Performance validation includes load testing representative sections to 150% of design capacity, with deflection monitoring continued through the first year of service. The completed systems demonstrate vibration frequencies above 8 Hz, ensuring comfort for occupants under normal usage conditions.
Steel-truss composite floors offer a technically sophisticated solution for high-load buildings, combining structural efficiency with construction practicality. Jiangsu Dunbon Steel Structure's integrated approach—from optimized design and precision manufacturing to efficient installation—ensures reliable performance for industrial facilities, commercial structures, and special-purpose buildings where load capacity and construction speed are critical factors.