Welding Insights for Framed Metal Drain Grates

Framed metal drain grates are commonly used in various applications, yet their specific parameters are not widely known. Below, we will share some essential construction insights about framed metal drain grates. The construction of framed metal drain grates can be divided into three main parts: grid welding, frame welding, and surface treatment.

Framed metal drain grates, as the name suggests, have frames welded around the perimeter of the metal grating. Typically, the edging of metal grates uses flat steel of the same specifications as the grating. Alternatively, angle iron or tread plate can be used for edging, but the cross-sectional area of the edging should not be smaller than that of the load-bearing flat steel. Edging not only serves to connect the flat steel and crossbars but also plays a significant role in enhancing the load-bearing capacity of the metal drain grates.

  • For welding metal grates, priority is given to resistance spot welding, although arc welding can also be used.
  • At each intersection of the load-bearing flat steel and crossbars, they should be securely fixed through welding, riveting, or pressure locking.
  • Metal grates can be processed into various shapes according to the user’s requirements.
  • Pressure locking of the metal grates can be achieved by using a press to secure the crossbars into the load-bearing flat steel.
  • The spacing between load-bearing flat steel and crossbars can be determined by the supplier and the demand side according to design requirements. For industrial platforms, it is recommended that the spacing between load-bearing steel grate flat bars not exceed 40mm, and the spacing between crossbars not exceed 165mm.

Surface Treatment: Framed metal drain grates undergo various surface treatments, including spray coating, dip coating, and hot-dip galvanization. A detailed discussion of these treatments is complex and will be covered in future articles. In summary, surface treatment involves applying a layer of corrosion-resistant material to the surface of the frame guardrail mesh through a special process to enhance corrosion resistance and extend its lifespan.

metal drain grates

Types of Framed Metal Drain Grates

Standard Drain Grates: These are the most common and versatile, suitable for various drainage systems.
Trench Drain Grates: Designed for linear drainage systems, such as in parking lots, sidewalks, and industrial facilities.
Tree Grates: These specialized grates are used around trees in urban landscapes to provide protection and aeration for tree roots.
Specialty Grates: Custom-designed grates are available for unique applications, such as decorative grates for architectural purposes.

Construction Details

Grid Welding: The grid portion of the metal drain grate is typically made by welding crossbars to load-bearing flat bars. Welding methods may include resistance spot welding or arc welding, depending on the application and manufacturer’s specifications.
Frame Welding: The frame, often made from angle iron or flat steel, is welded around the perimeter of the metal grate. This frame provides structural support and ensures the grate fits securely within the drainage system.
Surface Treatment: Surface treatment options include:
Spray Coating: A layer of protective material is applied through a spraying process. This coating enhances corrosion resistance and adds durability.
Dip Coating: The grates are immersed in a coating material, ensuring comprehensive coverage. Dip coating provides robust protection against corrosion.
Hot-Dip Galvanization: This process involves immersing the grates in molten zinc, creating a thick, durable zinc coating that offers exceptional corrosion resistance, making it ideal for outdoor and industrial environments.

As a manufacturer of framed metal drain grates, AGICO specializes in producing hot-dip galvanized steel grating of various specifications, trench cover plates, and step plates. We offer prices and quotations for framed trench cover plates and can accommodate custom orders for special specifications, in addition to maintaining a substantial inventory of standard products.

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