Part of FRP Manhole Covers Category

FRP Gully Gratings & Stormwater Drainage Chamber Covers

High-Flow, Rust-Proof Composite Drainage Slotted Covers for Municipal & Industrial Stormwater

Direct Factory Manufacturer

Operating out of our dedicated Bhiwandi facility since 1962 with zero distributor markup.


  • ISO 9001:2015 Certified Production
  • Custom Dimensions & Sizing
  • Rapid PAN India Freight Dispatch

Engineering Overview & Technical Application

Clogged and rusted roadside stormwater drains cause severe urban waterlogging during monsoons. Rawji Exports manufactures high-discharge FRP gully gratings and drainage chamber covers designed with optimal slot geometry for maximum water intake while preventing debris entry and tire entrapment.

Technical Parameters

Engineering & Material Specifications

Rigorous quality testing and dimensional accuracy conforming to national and international composite standards.

Slot Geometry Bicycle-safe longitudinal and transverse slotted intake profiles
Discharge Capacity High flow-rate hydraulic intake design (Up to 45% open waterway area)
Load Rating Class B125 (12.5 Tonne), Class C250 (25 Tonne), Class D400 (40 Tonne)
Standard Sizes 300x300, 450x450, 500x500, 600x600, 600x450, 900x450mm and custom sizes
Hinge Option Integrated lockable composite hinge allowing 110-degree opening for vacuum cleaning
Chemical Immunity Resists road de-icing salts, sewage gases (H2S), oil runoff, and acid rain
Sediment Bucket Optional removable composite silt trap basket for easy cleanout
Applications Highway kerb sides, stormwater trenches, parking plazas, factory perimeter drains
Common Queries

Frequently Asked Questions

Detailed technical and commercial answers from our composite product engineering team.

Yes. Our slot dimensions comply with bicycle-safety standards (maximum 20mm slot width), preventing bicycle tires and pedestrian heels from getting caught.

Yes. We offer heavy-duty hinged models where the grating swings open up to 110 degrees, allowing municipal workers to clear debris without lifting heavy detached covers.

No. Unlike cast iron drain gratings that rust shut in coastal towns, composite covers remain 100% rust-free indefinitely.

Request Factory Pricing & Technical Sizing

Fill out the quick RFQ form below to receive a formal quotation, CAD layout drawings, and bulk volume rates within 2 business hours.

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Direct Factory Dispatch From Bhiwandi Manufacturing Plant Across: Mumbai MMR, Thane, Navi Mumbai, Pune (Chakan, Talegaon, PCMC), Gujarat Industrial Belt (Ahmedabad, Surat, Dahej PCPIR, Ankleshwar GIDC, Vapi), Delhi-NCR, Hyderabad, Bengaluru, Chennai, and PAN India infrastructure projects.