Street Storm Drain Grates

Sponge city development is an important concept in modern urban planning. It uses permeable surfaces and water infiltration facilities to improve rainwater management. Rainwater is guided back into the ground instead of being completely discharged through traditional drainage pipes.

Our Dingjian street storm drain grates are designed to support sponge city applications. The item number is 450 × 750 overflow opening. The product has an A15 load rating with a 1 kN capacity, which is suitable for pedestrian areas only.

These grates are designed for park green paths, landscape walkways, and sponge city roads. They provide drainage functions while allowing part of the rainwater to infiltrate into the soil below.

The design of these street storm drain grates combines two drainage functions in one structure. During rainfall, part of the water flows through the grate slots into the infiltration layer below, allowing gradual absorption into the surrounding soil.

The remaining water enters the overflow opening and connects with the municipal drainage system. This dual drainage method provides reliable flood control during heavy rain while maximizing natural water infiltration during normal rainfall.

The slotted structure improves water contact with the soil and supports efficient infiltration performance. This design aligns well with sponge city principles and sustainable urban drainage requirements.

The A15 load rating of these street storm drain grates indicates that they are designed for pedestrian traffic only. They are suitable for park green paths, landscape trails, and other areas without vehicle access.

The large overflow opening provides fast water discharge during heavy rainfall and helps reduce surface water accumulation when infiltration capacity is limited. The combined infiltration and overflow system automatically balances water absorption and drainage performance.

No additional operation is required, making the product simple and practical for green landscape applications.