EnZar®
Offshore Platform Reinforced Floor Grating – Anti-corrosion and Non-slip
Offshore platform reinforced floor grating is a reinforced variant of offshore drilling platform steel grating, designed for high-load service in harsh marine environments where safety is critical. Its key structural feature is an additional round bar welded beneath the twisted cross bars and parallel to the bearing bars. This reinforcement prevents 15 mm-diameter spheres and similarly sized objects from passing through the grating, improving personnel and equipment safety. With excellent corrosion resistance, slip resistance, high strength, and lightweight construction, the grating is widely used for floors on offshore oil drilling platforms, shipbuilding, and marine engineering projects.
OPR-01: A offshore platform reinforced floor and the largest diameter is 15 mm.
Specifications & Standards
Our products comply with the O-SP-SS international standard, which was specifically developed for drilling platforms and shipbuilding applications.
Table 1: Offshore Platform Reinforced Floor Grating Specifications
| Parameter |
Specifications |
| Material |
S235 or S355 steel (equivalent to Q235B or Q355B) |
| Surface Treatment |
Hot-dip galvanized, electro-galvanized, or painted; customizable |
| Manufacturing Process |
Press-welded: twisted cross bars are pressed into bearing bars at 1000 kN and resistance-welded at 2500 kVA to form an integral structure |
| Bearing Bar Dimensions |
Height: 25, 30, 35, 40, 45, 50 mm; Thickness: 3, 4, 5 mm; serrated surface for slip resistance |
| Standard Mesh Spacing |
38.28 × 101.6 mm (bearing bar pitch × cross bar pitch); alternative: 34.3 × 101.6 mm |
| Reinforcement Round Bar |
Welded beneath the cross bars, parallel to the bearing bars, preventing a 15 mm test ball from passing through |
| Banding (Edge Frame) |
Flat bars typically matching the bearing bar cross-section |
| Standard Panel Size |
6100 × 1000 mm; custom cut sizes with re-edging on all sides |
OPR-02: Structure specification diagram
Load-Bearing Reference
The table below shows the maximum clear span for common bearing bar sizes under walking loads, based on a maximum deflection of 4 mm (L/200). Values are for preliminary design reference only.
Table 2: Offshore Platform Reinforced Floor Grating Load-Bearing Reference
| Bearing Bar Size |
Weight (kg/m²) |
Maximum Clear Span |
| 25 × 5 mm |
41.10 |
910 mm |
| 30 × 5 mm |
47.20 |
1115 mm |
| 35 × 5 mm |
53.30 |
1319 mm |
| 40 × 5 mm |
59.40 |
1523 mm |
| 45 × 5 mm |
65.50 |
1726 mm |
| 50 × 5 mm |
71.60 |
1928 mm |
| Note: Span values are based on standard load conditions; actual design should account for specific working conditions and appropriate safety factors. |
Offshore platform reinforced floor grating in different shapes
To meet different installation requirements, the grating is available in the following configurations:
- Rectangular with Frame: Provides greater rigidity and supports modular installation.
- Rectangular without Frame: Suitable for on-site cutting or flush-edge installation.
- Circular: Custom-made for installation around pipes, tower bases, or other circular areas.
OPR-03: Rectangular offshore platform reinforced floor grating with frame.
OPR-04: Rectangular offshore platform reinforced floor grating without frame.
OPR-05: Circular offshore platform reinforced floor grating.
Features of offshore platform reinforced floor
- Enhanced fall protection. The reinforced mesh helps prevent small objects from falling through the floor, improving passive safety.
- Superior load capacity. Designed to withstand strong winds, waves, and storms while maintaining structural integrity under harsh offshore conditions.
- Corrosion & slip resistance. Corrosion-resistant surface treatments and serrated bearing bars provide secure footing and long service life.
- Lightweight & high-strength. Provides high load capacity with reduced deadweight, while the open mesh helps prevent sediment buildup.
- Low maintenance. Damaged panels can be replaced individually without removing the entire floor, reducing downtime and maintenance costs.
Applications of offshore platform reinforced floor grating
Offshore platform reinforced floor grating is widely used for offshore oil drilling floors and platforms, the shipbuilding industry, and other high-corrosion, high-load industrial environments.
- Offshore engineering. Floors, walkways, and equipment access platforms on oil and gas drilling rigs.
- Shipbuilding. Engine room flooring, gangway platforms, and cargo hatch covers on vessels.
- Other industrial sectors. High-corrosion, high-load platforms in chemical plants, power stations, and similar facilities.
OPR-06: Offshore platform reinforced grating can be used as floor.
OPR-07: Offshore platform reinforced floor with high bearing capacity.
