1. Material Specification

Common Grades: Q235B, Q345B (Chinese standard); ASTM A36, ASTM A653 (American standard); S235JR, S355JR (European standard)

Strength Requirements: Yield strength ≥ 235–355 MPa, tensile strength ≥ 375–550 MPa, elongation ≥ 15%
Application Note: High-rise buildings or heavy-load floors are recommended to use high-strength steel grades (e.g., Q345B, S355JR)

2 Typical Models (Taking Corrugated Deck as an Example)

YX75-230-690: Corrugation height 75 mm, wave pitch 230 mm, effective width 690 mm

YX51-250-750: Corrugation height 51 mm, wave pitch 250 mm, effective width 750 mm

YX35-125-750: Corrugation height 35 mm, wave pitch 125 mm, effective width 750 mm (suitable for light-load floors)

3. Mechanical Performance Requirements

Bending strength: The bending deflection under design load shall not exceed L/200 (L is the span of the deck)
Shear capacity: The shear resistance of the deck at the support shall meet the requirements of GB 50017 or AISC 360
Composite performance: For composite steel deck, the bond strength between the deck and concrete shall be ≥ 0.2 MPa

4. Fire Resistance

The fire resistance limit of the steel floor deck system is determined by the thickness of the concrete slab and the protective layer:Concrete thickness ≥ 100 mm: Fire resistance limit ≥ 1.0 h

Concrete thickness ≥ 120 mm: Fire resistance limit ≥ 1.5 h

For fire-resistant buildings, fireproof coating (thickness ≥ 20 mm) can be applied to the bottom of the deck

5. Manufacturing and Installation Standards

 Manufacturing Tolerances Thickness tolerance: ±0.05 mm Width tolerance: ±2 mm
Corrugation height tolerance: ±1 mm Flatness: The deviation per meter length shall not exceed 3 mm

6. Installation Requirements

The deck shall be lapped on the steel beam, and the lapping length shall be ≥ 50 mm

The deck shall be fixed with self-drilling screws or welding, and the spacing of fasteners shall be 300–500 mm

Before pouring concrete, the deck shall be temporarily supported to prevent excessive deflection

7. Application Scope

Industrial plants, warehouses, logistics centers

Multi-story steel structure office buildings, residential buildings

Mezzanine floors, platforms, pedestrian bridges

Stadiums, airports, large public buildings

Specification