BMP Slope Protection
Hot dipped galvanized steel grating is a high-performance product that provides exceptional durability and strength. This type of grating is ideal for various applications, including platforms, stair treads, walkways, and floors in industrial, commercial, and civil buildings. It is well-known for its anti-corrosion properties, strength, and ability to withstand heavy loads in challenging environments. In this article, we will explore the features, specifications, and benefits of hot dipped galvanized steel grating, as well as answer some frequently asked questions.
 cross bars are notched and have same height.
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 Bearing bars are higher than the cross bars,bearing bars are notched.
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 higher than the cross
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 Notch on the bearing bars are at a angle of 30° or 45°
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What is Hot Dipped Galvanized Steel Grating?
Hot-dipped galvanized steel grating consists of steel bars coated with zinc through a hot-dip galvanizing process. This coating protects the grating from corrosion, making it ideal for outdoor applications where exposure to the elements is common. The construction involves arranging the bearing and cross bars in a specific pattern to create a strong, stable platform.
Technologies in Galvanized Steel Grating: Welded vs. Press-Locked
Welded Galvanized Grating Technology
Welded galvanized grating is widely used in industrial and commercial applications. It is made by welding cross bars onto bearing bars using a high-pressure resistance welding machine. Here’s how the process works:
- Welding the Cross Bars to Bearing Bars: Workers weld cross bars, typically round or square rods, onto bearing bars using resistance welding technology. The welding machine generates enough heat to fuse the cross bars securely to the bearing bars, creating a strong, durable joint.
- Cutting and Banding: After welding, the grating gets cut to the required size. Workers often band the edges to strengthen the structure and improve the finish.
- Surface Treatment: After welding and cutting, the grating undergoes a surface treatment, usually hot-dip galvanizing. The process coats the grating with a layer of zinc, protecting it from rust and wear in harsh environments.
Press-Locked Galvanized Grating Technology
Press-locked galvanized grating uses a different method to attach cross bars to bearing bars. This process results in superior strength and durability. Here’s how it works:
- Grooving the Bars: Workers groove both the bearing bars and the cross bars precisely. The bearing bars have slotted openings, and the cross bars are shaped to fit perfectly into these slots, ensuring a mechanical connection.
- Pressure-Locking the Cross Bars: The grooved cross bars get pressure-locked into place using high hydraulic force. The pressure-locking method ensures a secure, permanent connection between the cross bars and bearing bars.
- Welding and Hot-Dip Galvanizing: After pressure-locking, workers weld the grating at the joints for extra stability. Then, they apply a hot-dip galvanizing process to the entire grating, coating it with zinc. This coating prevents corrosion and ensures durability in outdoor environments.
Comparison: Welded vs. Press-Locked Galvanized Grating
Both welded and press-locked galvanized grating have their unique advantages, and the choice between the two technologies depends on the specific application requirements. Below is a comparison of the two:
| Feature | Welded Galvanized Grating | Press-Locked Galvanized Grating |
|---|---|---|
| Construction Process | Cross bars are welded onto bearing bars using high-pressure resistance welding. | Cross bars are pressure-locked into bearing bars using hydraulic force and grooving. |
| Connection Type | Permanent welded joint for a strong and secure bond. | Mechanical locking joint with hydraulic pressure, ensuring a strong and permanent connection. |
| Strength | High strength, suitable for most heavy-duty applications. | Even higher strength with excellent lateral stiffness, ideal for special applications. |
| Surface Treatment | Typically hot-dip galvanized or electro-galvanized for corrosion resistance. | Hot-dip galvanized for superior corrosion protection, with an additional welded reinforcement. |
| Durability | Durable, but can be prone to minor rusting or wear at the welded joints over time. | Extremely durable with a robust, corrosion-resistant zinc coating that lasts longer. |
| Appearance | Uniform and smooth appearance with visible welded joints. | Clean, sleek appearance with no visible welding, offering a more aesthetically pleasing look. |
| Applications | Commonly used for industrial platforms, walkways, and stair treads. | Ideal for areas requiring high strength, such as airports, terminals, and large-span environments. |
Advantages of Press-Locked Grating Over Welded Grating
- Superior Strength: The pressure-locking process provides higher strength, particularly for areas with heavy traffic and extreme conditions.
- Better Corrosion Resistance: The absence of welding points in the press-locked grating design reduces the risk of rust forming around the joints, making it more corrosion-resistant.
- Lateral Stiffness: Press-locked grating has excellent lateral stiffness, making it suitable for special applications such as long spans or areas with high load-bearing requirements.
- Clean Aesthetic: Press-locked grating often has a smoother, more modern appearance due to the lack of visible welds, making it a preferred choice for architectural projects.
 Galvanized grating. |
Serrated galvanized grating |
Bearing bars of galvanized steel grating
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Twisted bars of galvanized steel grating.
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Key Features and Benefits
- Corrosion Resistance: The hot dip galvanizing process provides a strong protective zinc coating, making it resistant to rust and corrosion.
- Strength and Durability: The steel construction offers high load-bearing capacity and durability, making it ideal for high-traffic areas and heavy-duty applications.
- Non-slip Surface: Hot dipped galvanized steel grating often comes with a serrated surface, providing additional safety and slip resistance.
- High Drainage Efficiency: With a leakage area of 83.3%, it has significantly better drainage than cast iron alternatives.
- Low Maintenance: Due to its corrosion resistance and durability, it requires minimal maintenance, making it a cost-effective long-term solution.
- Aesthetic Appeal: The grating has a modern, silver appearance that complements many industrial and architectural designs.
Applications of Hot Dipped Galvanized Steel Grating
- Platforms: Ideal for industrial platforms that require durability and load-bearing capacity.
- Stair Treads: Used for safe, long-lasting stairways in high-traffic environments.
- Walkways and Floors: Perfect for walkways in factories, warehouses, and other industrial settings.
- Heavy Load Environments: Suitable for airports, terminals, and other large-span applications with high load requirements.
Specifications
Here are the key specifications of hot dipped galvanized steel grating:
| Item | Description |
|---|---|
| Bearing Bar Dimensions | 25x4mm, 25x5mm, 30x3mm, 30x5mm, 32×4.5mm, 50x5mm, 75x10mm, etc. |
| Bear Bar Pitch | 12.5mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 60mm (US Standard: 1″x3/16″, 1 1/4″x3/16″, etc.) |
| Cross Bar Pitch | 38mm, 50mm, 76mm, 100mm, 101.6mm |
| Material | Carbon Steel (Q235), Stainless Steel (SS304) |
| Surface Treatment | Hot-Dipped Galvanized, Painted, or Powder Coated |
| Surface Type | Smooth Surface, Serrated Surface |
| Serrated Surface Types | PR/S1: Trapezoidal teeth on bearing bars, PR/S2: Teeth on both bearing and cross bars, PR/S3: Teeth on connection components |
| Galvanization Standards | GB/T 13912-2002 (China), ASTM A123 (USA), BS 729 (UK), AS1657-1992 (Australia) |
| Max Load Capacity | High strength, suitable for heavy load environments |
Types of Serrated Surface
- PR/S1: Trapezoidal teeth on the bearing bars.
- PR/S2: Trapezoidal teeth on both bearing and cross bars, offering the highest non-slip performance.
- PR/S3: Non-slip teeth applied to the connection components, with lower non-slip performance compared to PR/S1 and PR/S2.
Advantages of Hot Dipped Galvanized Steel Grating
- High Strength: Steel construction provides excellent load-bearing capacity and durability, making it suitable for heavy-duty applications.
- Corrosion Resistance: The hot-dip galvanization process ensures a robust protective layer against corrosion, especially in harsh outdoor environments.
- Slip Resistance: The serrated surface adds an extra layer of safety by preventing slips in high-traffic areas.
- Maintenance-Free: Due to its durable surface treatment, hot dipped galvanized grating requires very little maintenance.
- Efficient Drainage: The grating’s design allows for better drainage, making it ideal for areas exposed to water or snow.
- Aesthetic Appeal: The grating has a sleek, modern design that adds visual appeal to any project.
FAQ: Frequently Asked Questions
- What is the difference between welded steel grating and hot-dipped galvanized steel grating?
Welded steel grating features twisted square rods as cross bars, while hot-dipped galvanized steel grating uses rectangular bars for both bearing and cross bars. The galvanized grating resists corrosion better and requires less maintenance compared to welded steel grating.
- Can hot-dipped galvanized steel grating be used outdoors?
Yes, hot-dipped galvanized steel grating suits outdoor use. The zinc coating protects against corrosion from weather exposure, making it ideal for platforms, stair treads, and walkways.
- How long does the hot-dipped galvanized coating last?
The hot-dip galvanized coating remains highly durable for many years, even in harsh environments. Its lifespan depends on exposure conditions, but it generally provides long-term corrosion protection.
- Is the hot-dipped galvanized steel grating easy to install?
Yes, you can install hot-dipped galvanized steel grating easily. It comes in pre-fabricated panels that you can place and fix using clips or fasteners. The design allows for quick installation with minimal tools.
- What are the benefits of a serrated surface on hot-dipped galvanized steel grating?
A serrated surface enhances slip resistance, making it safer in areas with heavy foot traffic or exposure to water, snow, or oil. This surface type works well in outdoor environments where safety is essential.
Conclusion
Hot dipped galvanized steel grating is a versatile and durable solution for various industrial, commercial, and civil applications. Its high strength, corrosion resistance, and slip-resistant properties make it ideal for heavy-duty use in harsh environments. The addition of serrated surfaces further enhances its safety features, while the hot-dip galvanizing process ensures long-lasting protection against corrosion. Whether you’re looking for a grating solution for platforms, stair treads, or walkways, hot dipped galvanized steel grating offers an excellent choice for your needs.
By understanding the specifications, features, and benefits of this product, you can make an informed decision about incorporating hot dipped galvanized steel grating into your projects.
