Press Welded Grating

1. Product Overview

Press Welded Grating is engineered through an advanced automatic high-voltage resistance welding process. Utilizing our facility’s four dedicated heavy-duty pressure welding lines, we fuse twisted square cross bars into bearing bars under massive hydraulic force and high-current resistance. This results in a permanent, monolithic structural grid. By operating multiple high-capacity lines, we provide industry-leading production speed and the unique ability to manufacture custom-sized panels directly during production. This capability avoids the material waste associated with cutting standard sheets, providing a cost-effective solution for large-scale industrial projects.

2. Technical Parameters

Feature	Specification Details (Carbon Steel)	Standards & Notes
Material Grade	Q235B, Q355B, ASTM A36, S275JR	High-tensile structural carbon steel
Bearing Bar Type	Plain / Serrated (for slip resistance)	I-Bar options for weight optimization
Bearing Bar Depth	20mm – 60mm	Scales with clear span requirements
Bearing Bar Thickness	3mm – 6mm	5mm for heavy industrial use
Cross Bar Size	6mm,8mm,10mm	Resistance-welded for lateral stability
Mesh Pitch (Center)	20mm – 100mm  (Range Available)	Custom configurations to minimize waste
Panel Dimensions	Width ≤ 1000mm, Length ≤ 7000mm	Customized to fit container & galvanizing limits
Surface Treatment	Hot-Dip Galvanized, Bitumen, Painted	Galvanizing per ASTM A123 / ISO 1461
Manufacturing Std	ANSI/NAAMM MBG531, BS4592, AS1657	Verified for global engineering safety

Common mesh hole spacing：

 

Bearing bar	Cross Bar
15,08				38,1	50,8	76,2	101,6
17,15				38,1	50,8	76,2	101,6
20,77		24,0		38,1	50,8	76,2	101,6*
23,69		24,0		38,1	50,8	76,2	101,6*
25,00						76,2	101,6
30,15				38,1	50,8	76,2	101,6
33,00			31,75
34,30	19,25	24,0		38,1	50,8	76,2	101,6
41,45		24,0		38,1	50,8	76,2	101,6
45,23				38,1	50,8	76,2	101,6
51,45				38,1	50,8	76,2	101,6
60,30		24,0		38,1	50,8	76,2	101,6
68,60		24,0		38,1	50,8	76,2	101,6

 

bearing bar profile：

bearing bar 2mm	bearing bar 3mm	bearing bar 4mm	bearing bar 5mm
20/2	20/3	20/4	20/5
25/2	25/3	25/4	25/5
30/2	30/3	30/4	30/5
35/2	35/3	35/4	35/5
40/2	40/3	40/4	40/5
45/2	45/3	45/4	45/5
50/2	50/3	50/4	50/5
	60/3	60/4	60/5
	70/3	70/4	70/5
	80/3	80/4	80/5

 

1. Engineering Notes:

Engineering Notes: This carbon steel series utilizes a high-density resistance welding process to achieve structural unification. When specifying for Port & Logistics Hubs, the dynamic impact of heavy-axle loads must be cross-referenced with our load-span tables to ensure the bars remain within the elastic deformation range. In Pest-Control or High-Pedestrian zones, a narrow-mesh pitch (e.g., 33x100mm) should be selected to prevent rodents from passing through and to minimize the risk of high-heeled shoes or small objects getting trapped. All panels should be securely fixed to the support frame using specialized saddle clips to prevent the rattling and joint fatigue common in high-vibration manufacturing environments.

 

3. Product Advantages

1.High-Precision Resistance Fusion: Our automated pressure welding lines ensure that every intersection is fused at the molecular level. This eliminates the manual errors found in traditional welding, resulting in a rattle-free, monolithic structure that maintains its integrity under high-frequency industrial vibrations.

2.Exceptional Capacity and Reliability: With four independent automated production lines, we offer unmatched scalability. This infrastructure allows us to handle high-volume orders simultaneously while maintaining strict adherence to project deadlines and consistent quality standards across thousands of panels.

3.Material Efficiency & Cost Reduction: Unlike competitors who sell standard sheet sizes that result in high scrap rates, our automated lines allow for precise dimensional customization (Width $\le$ 1000mm). We produce exactly what you need, significantly reducing material waste and lowering your overall project cost.

4.Superior Durability & Safety: The electro-forging process embeds the twisted cross bars flush with the bearing bars. This creates a predictable, multi-directional anti-slip surface while ensuring the hot-dip galvanized coating provides 100% uninterrupted protection at every fused joint.

 

4. Applications & Engineering Scenarios

1.Large-Scale Industrial Platforms: The primary choice for power plants, refineries, and chemical plants where high-capacity, consistent flooring is required for worker safety.

2.Heavy-Duty Infrastructure: Designed for bridge walkways and municipal trench covers that must endure repetitive dynamic wheel loads without joint failure.

3.Automated Logistics Hubs: The precision and flatness of our resistance-welded panels are ideal for the smooth operation of high-tech sorting systems and forklift traffic.

5. Quality Control & Performance

1.Automated Weld Integrity Audit: Our lines are equipped with real-time sensors to monitor pressure and current, ensuring every weld meets specified shear strength requirements.

2.Zinc Coating Thickness Verification: We utilize professional Zinc Coating Thickness Gauges to verify 100% compliance with ASTM A123 or ISO 1461. We verify thickness at both the flats and the fusion points to guarantee long-term corrosion resistance.

3.Load-Span Deflection Testing: Every production batch is verified against ANSI/NAAMM load tables to confirm the $L/200$ deflection ratio meets the safety factors required for industrial use.

 

6. Factory Customization & Engineering Services

1.Direct-Line Custom Sizing: We customize panel dimensions on our automated lines (up to 7 meters long) to your exact specifications, providing a “Ready-to-Install” product that minimizes on-site waste and labor.

2.High-Profile Kick-plates & Banding: For enhanced safety, we offer factory-welded 100mm-150mm High-Profile Kick-plates (Toe-boards). Each bar is individually welded to provide maximum perimeter strength and comply with OSHA regulations.

2.Professional CAD Layout & ID Numbering: Our technical team provides detailed Shop Drawings. Every panel is assigned a Unique ID Number corresponding to the layout map, allowing for an error-free, rapid assembly sequence.

3.Custom Engineering Support: We offer specialized combinations of bearing bar specifications to optimize the weight-to-load ratio, specifically designed to meet your project’s unique budget and structural needs.

7. FAQ

Q: How does having four production lines benefit my project?

A: It ensures high-volume capacity and backup reliability. If one line requires maintenance, the others continue, ensuring your delivery schedule is never compromised.

Q: Can you produce non-standard sizes to reduce my costs?

A: Absolutely. Our automated lines are programmable for custom dimensions (Width $\le$ 1000mm), meaning you only pay for the material you need, with no excess waste.

Q: Why is resistance welding better than manual welding for grating?

A: Resistance welding provides a deeper, cleaner, and more consistent bond at every intersection, creating a stronger and more aesthetic product without the risk of slag or uneven welds.

Q: What is the maximum panel size you can manufacture?

A: We can manufacture panels up to 1000mm in width and 7000mm in length. This accommodates most shipping container limits and galvanizing tank capacities while minimizing the number of joints on your platform.

In summary, Press Welded Grating delivers superior structural integrity, vibration resistance, and cost savings through precise customization and waste reduction. Ideal for large-scale industrial platforms, logistics hubs, power plants, refineries, bridge walkways, and heavy-duty infrastructure, its consistent molecular-level welds, reliable load performance, and factory-ready panels ensure fast installation, long-term durability, and compliance with global standards.