Core Function: Drainage and Flood Control

Efficient drainage: Through grille/hole design (such as a leakage area of 83.3%, more than twice that of cast iron), rainwater and sewage are quickly guided into the drainage ditch, reducing surface water and preventing slippery roads, traffic congestion, and floods. For example, in plum rain season or rainstorm, urban waterlogging can be avoided.
Anti clogging design: Scientifically graded aperture (such as a 30x30mm diamond shaped hole on the surface to intercept leaves and gravel, and a 5mm stainless steel filter on the lower layer to capture sediment), combined with a diversion acceleration structure (such as a 2 ° inclined angle, V-shaped drainage channel), enhances self-cleaning ability, reduces pipeline blockage risk, and lowers dredging costs.

Safety protection and load-bearing capacity

Load bearing capacity: Suitable for different scenarios based on the material (cast iron, stainless steel, composite materials, etc.) and design:
Lightweight scenes (sidewalks, gardens): using composite materials or lightweight cast iron, with a load-bearing capacity of 5-10 tons.
Heavy duty scenarios (airports, docks, parking lots): Use high-strength stainless steel or hot-dip galvanized steel grilles with a load-bearing capacity of over 30 tons to ensure safe passage of vehicles.
Special scenarios (car wash rooms, factories): require impact resistance and corrosion resistance, such as resin composite cover plates that can withstand acidic and alkaline liquids to avoid chemical reaction damage.
Surface anti slip patterns (depth ≥ 0.3mm) reduce the risk of pedestrians slipping; Edge rounded corner design to prevent collision; Hinge connections or locks (such as cast iron cover plates with locks) prevent illegal opening and ensure the safety of pedestrians and vehicles.

Durability and Maintenance

Material durability:
Stainless steel: corrosion-resistant, long service life (up to 20 years), beautiful appearance, but high cost, suitable for high-end places or coastal/chemical areas.
Reinforced concrete: Low in price, but highly brittle and prone to aging, gradually being replaced.
Maintenance points. .
Daily maintenance: Regularly clean debris (such as mud, hair), rinse with high-pressure water gun, check for flatness, anti slip wear and tear, and flexibility of hinges/locks.
Annual inspection: Before the rainy season, focus on checking for cracks, deformations, and rust, testing the load-bearing capacity to ensure compatibility with the base (gap ≤ 2mm), and avoiding problems caused by frost heave or thermal expansion and contraction.
Special scenarios: For example, car wash rooms need to check the drainage slope every month, and in winter in the north, it is necessary to clean up sediment and prevent frost heave; Chemical plants need to regularly inspect the corrosion of materials.

Aesthetics and scene adaptation

Aesthetic design: Simple lines, silver surface or customized colors enhance the visual effect of landscape areas, commercial streets, squares, and high-end residential areas. Some designs integrate LED light strips or artistic patterns to enhance nighttime safety and decoration.
Scene adaptation:
Municipal roads: require high load-bearing capacity, slip resistance, and easy maintenance, often using hot-dip galvanized steel grating or stainless steel grating.
Residential community: Emphasize aesthetics and safety, and choose hot-dip galvanized steel grating or stainless steel grating.
Industrial zone/chemical plant: Corrosion and impact resistance are required, and hot-dip galvanized steel grating or stainless steel grating is often selected.
Airports/docks: require large spans and heavy loads, using high-strength hot-dip galvanized steel grating or stainless steel grating.

Common Problems and Solutions

Rust/Corrosion: Regularly apply anti rust paint, choose corrosion-resistant materials (such as stainless steel, composite materials), and avoid using ordinary cast iron in acid rain/chemical plant areas.
Stolen/Loose: Using hinge connections, locks, or anti-theft designs (such as dedicated keys), regularly check whether the fixing bolts/expansion screws are loose.
Noise/shaking: Install rubber gaskets to reduce the noise of vehicles passing by, adjust the flatness of the cover plate to avoid shaking.