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HY-51-250-750 open-type steel floor decking is a profiled steel sheet designed for composite floor slab systems in multi-story construction. Manufactured on automated continuous roll-forming lines with 12+ years of production experience, this profile features embossed ribs that create mechanical bond with concrete topping, eliminating the need for temporary formwork during concrete pouring. The open flute design enables easy integration with mechanical, electrical, and plumbing systems before concrete placement.
This steel floor decking is produced per GB/T 12755-2008 and ASTM A653/A653M standards, with 100% dimensional inspection performed on each production batch. Mill test certificates per EN 10204 3.1 are available for all shipments, along with ISO 9001:2015 quality system documentation. The profile is suitable for use in composite floor construction with normal weight concrete, supporting both dead loads and imposed live loads per project engineering requirements.
Parameter | Value | Unit |
|---|---|---|
Profile Height | 51 | mm |
Rib Pitch | 250 | mm |
Effective Coverage Width | 750 | mm |
Coil Input Width | 1000 | mm |
Available Thickness | 0.8-1.2 | mm |
Custom Length Range | 1000-12000 | mm |
Thickness (mm) | Moment of Inertia (cm⁴/m) | Section Modulus (cm³/m) |
|---|---|---|
0.8 | 53.8 | 19.3 |
1.0 | 67.3 | 24.2 |
1.2 | 80.8 | 29.2 |
Standard material is hot-dip galvanized steel with Z180 (180g/m²) zinc coating for indoor applications. Z275 coating is available for projects in higher humidity environments. Steel grades include Q235B and Q355B per Chinese standards, with equivalent grades available per ASTM or EN requirements upon request.
This steel floor decking is specified for automotive assembly plants, heavy machinery workshops, and electronics manufacturing facilities. The 1.2mm thickness option supports imposed loads up to 5.0kN/m², suitable for areas with production equipment, material handling systems, and mezzanine storage levels. Installation rates of 800-1000m² per crew per day reduce construction schedules compared to traditional formwork systems.
For distribution centers and high-bay warehouses, this profile provides spanning capability up to 3.0m without intermediate propping, reducing structural steel requirements. The embossed surface creates composite action with concrete, resulting in overall floor depth reductions of 100-150mm compared to non-composite systems, increasing clear building height.
Office buildings, parking garages, and mixed-use developments utilize this steel floor decking for its consistent flatness and compatibility with all floor finish types. The open flute design allows for flexible routing of building services after deck installation, reducing coordination time between trades.
Side lap interlock creates a rigid working platform immediately after installation, providing safe access for following trades. The 750mm effective coverage width optimizes material utilization at 75%, reducing material waste compared to narrower profiles. Standard end laps of 50mm and side laps of one rib ensure structural continuity between sheets.
When used in composite construction with 120mm total concrete depth (C30 concrete), the system achieves 2-hour fire resistance rating without additional fire protection for spans up to 2.5m. Acoustic performance meets STC 52 when installed with 15mm ceiling battens and gypsum board, suitable for commercial office environments.
Standard production thicknesses are 0.8mm, 1.0mm, and 1.2mm. Thickness outside this range may be available for minimum order quantities of 5000m², with lead time adjusted accordingly.
Maximum construction span without temporary propping is 2.4m for 0.8mm, 2.7m for 1.0mm, and 3.0m for 1.2mm thickness, based on concrete weight of 24kN/m³ and 1.5kN/m² construction load.
Yes, mill test certificates including steel grade, zinc coating weight, and mechanical properties are provided with each delivery. Third-party inspection reports can be arranged for commercial procurement projects at additional cost.
Standard lead time is 7-15 working days for stock thicknesses and standard lengths. Custom lengths and special coating requirements require 20-25 working days from order confirmation.
Yes, panels are cut to project-specified lengths at the factory to minimize on-site cutting. Length tolerance is ±5mm for panels under 6m, and ±10mm for panels over 6m.
