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Our Galvanized Mild Steel Surcharge Grates are specialized drainage components engineered to relieve pressure and safely redirect excess water during heavy rainfall or stormwater system overloads. Installed over surcharge pits or designated overflow points, they serve as a secondary outlet when the main drainage system reaches capacity.
Constructed from high-strength galvanised steel, these grates provide a durable, corrosion-resistant, and low-maintenance solution for flood-prone or high-volume drainage areas.
| Description | Frame (L x W x D mm) | Grate (L x W x D mm) | Clear Opening (L x W mm) |
|---|---|---|---|
| 600x600 Raised Grate/ Frame M/D Cast In | 710 x 710 x 55 | 690 x 690 x 50 | 600 x 600 |
| 900x600 Raised Grate/ Frame M/D Cast In | 1010 x 710 x 55 | 990 x 690 x 50 | 900 x 600 |
| 900x900 Raised Grate/ Frame M/D Cast In | 1010 x 1010 x 55 | 990 x 990 x 50 | 900 x 900 |
| 1000x700 Raised Grate/ Frame M/D Bolt Down | 1110 x 810 x 55 | 1085 x 785 x 50 | 1000 x 700 |
| 1000x1000 Raised Grate/ Frame M/D Bolt Down | 1110 x 1110 x 55 | 1085 x 1085 x 50 | 1000 x 1000 |
| 1200x1200 Raised Grate/ Frame M/D Cast In | 1310 x 1310 x 55 | 2 x 640 x 1290 x 50 | 1200 x 1200 |