Gnee is a professional manufacturer and supplier of Slot Corten Steel Trench Grates, providing customized drainage solutions for landscape, architectural, and infrastructure projects.
Manufactured from high-quality weathering steel, these trench grates combine effective drainage performance, corrosion resistance, and a natural weathered appearance.


With a protective rust layer that develops over time, Corten steel trench grates can provide a service life of 50+ years with minimal maintenance in suitable environmen
What is Slot Corten Steel Trench Grates?
Slot Corten Steel Trench Grates are linear drainage covers manufactured from weathering steel (Corten steel) with a narrow continuous slot opening design. They are installed over trench drainage systems to collect and guide surface water from areas such as landscapes, walkways, plazas, driveways, and architectural projects.
Unlike traditional trench grates with large visible openings, the slot design features a slim and discreet drainage channel that provides effective water collection while maintaining a clean and modern appearance. The narrow opening helps integrate the drainage system into surrounding surfaces, making it an ideal choice for projects where both drainage performance and visual aesthetics are important.
Slot Corten Steel Trench Grates are commonly used in landscape design, pedestrian areas, commercial spaces, and public infrastructure projects where a durable and visually appealing drainage solution is required. With customizable slot widths, dimensions, and designs, they can be adapted to meet different project requirements.
Technical Specifications of Slot Corten Steel Trench Grates
| Item | Specification |
|---|---|
| Product Name | Slot Corten Steel Trench Grates |
| Material | Corten Steel / Weathering Steel |
| Available Grades | ASTM A588, ASTM A606, S355J2WP, SPA-H |
| Standard | ASTM / EN 10025-5 / JIS G3125 |
| Surface Finish | Natural Weathering Patina / Pre-Rusted Surface |
| Slot Opening | Customized according to drainage requirements |
| Length | Customized |
| Width | Customized |
| Thickness | Customized |
| Manufacturing Process | Laser Cutting, CNC Cutting, Welding |
| Application | Drainage Systems, Landscape Projects, Architectural Areas, Pedestrian Zones |
| Customization | Available based on drawings and project requirements |
| Maintenance | Low maintenance after protective patina formation |
Slot Corten Steel Trench Grates vs Traditional Drainage Covers
Compared with traditional drainage covers, Slot Corten Steel Trench Grates provide a more integrated drainage solution that combines functionality with architectural aesthetics.
Traditional drainage covers are usually designed mainly for water collection, featuring larger openings and common materials such as galvanized steel, stainless steel, or cast iron.
While they can meet basic drainage requirements, their appearance and long-term maintenance may not always suit modern landscape and architectural projects.
| Feature | Slot Corten Steel Trench Grates | Traditional Drainage Covers |
|---|---|---|
| Design | Narrow slot opening with a minimalist appearance | Larger openings with more visible grate patterns |
| Appearance | Blends with modern landscapes and architectural surfaces | More functional and less visually integrated |
| Material | Weathering steel with natural patina | Usually galvanized steel, cast iron, or coated steel |
| Maintenance | Minimal maintenance after patina formation | May require repainting or anti-corrosion treatment |
| Applications | Landscapes, plazas, commercial areas, pedestrian zones | General drainage areas and utility spaces |
With their combination of efficient drainage, natural weathered appearance, and customizable design options, Slot Corten Steel Trench Grates are an ideal choice for projects that require both practical drainage performance and aesthetic integration.
pgrade your drainage system with durable and visually integrated Slot Corten Steel Trench Grates. Gnee provides custom sizes, designs, and fabrication solutions to meet different landscape and construction needs. Get in touch with us for a professional quotation.
Contact now to get customized Slot Corten Steel Trench Grates tailored to your project requirements
Application of Slot Corten Steel Trench Grates
Slot Corten Steel Trench Grates are widely used in landscape, architectural, and infrastructure projects where effective drainage needs to be combined with a clean and integrated appearance.
Unlike ordinary drainage covers that may interrupt the surrounding design, the slim slot structure allows the drainage system to blend naturally into outdoor surfaces while providing reliable water collection.
Landscape and Garden Drainage
For gardens, parks, courtyards, and pathways, corten steel garden drainage and landscape trench grates help prevent water accumulation while maintaining a clean landscape appearance.
The natural weathered finish of Corten steel blends well with outdoor environments, making it suitable for decorative drainage applications.

Commercial and Architectural Projects
In hotels, plazas, shopping centers, and office buildings, Slot Corten Steel Trench Grates provide a discreet drainage solution that matches modern architectural designs. The narrow slot opening keeps surfaces visually clean while maintaining effective drainage performance.

Driveways and Pedestrian Areas
For driveways and pedestrian zones, these trench grates provide efficient water collection and help improve surface safety. Their durable Corten steel construction makes them suitable for outdoor areas requiring long-term performance with minimal maintenance.

Customization Options for Slot Corten Steel Trench Grates
Gnee provides customized Slot Corten Steel Trench Grates to meet different drainage requirements and project designs. From material selection to dimensions and surface finishes, we can provide flexible solutions for landscape, architectural, and infrastructure applications.
Material Options
We offer multiple weathering steel options, including ASTM A588, ASTM A606, S355J2WP, and SPA-H, allowing customers to select suitable materials based on project requirements and environmental conditions.
Size Customization
The trench grates can be customized in different sizes, including length, width, thickness, and slot opening dimensions. This flexibility allows the drainage system to fit various installation spaces and load requirements.
Surface Treatment Options
Customers can choose different surface finishes, including natural weathering finish and pre-rusted surface treatment. The natural finish allows the steel to develop its own protective patina over time, while pre-rusted treatment provides an aged appearance for projects that require immediate visual results.




With professional fabrication capabilities, Gnee supports customized Slot Corten Steel Trench Grates based on drawings, specifications, and application requirements.
Contact now to get customized Slot Corten Steel Trench Grates tailored to your project
Quality Inspection of Slot Corten Steel Trench Grates
Gnee conducts strict quality inspections before delivery to ensure every Slot Corten Steel Trench Grate meets project requirements. Each product is checked for dimensions, weld strength, surface finish, and structural performance, helping guarantee easy installation, durability, and reliable drainage performance.



Packaging of Slot Corten Steel Trench Grates
The following packing techniques are commonly used for steel grating destined for export projects:
- Wooden Pallets or Crates: Panels are stacked and secured on export-grade wooden pallets or inside crates to prevent shifting.
- Corrosion-Resistant Film: Wrapping grating with protective film helps guard against moisture during sea transit.
- Pallet Strapping and Edge Protection: High-strength straps and edge guards prevent panel damage during handling and container loading.








