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Drainage Grates NATA Certified from Nepean Building & Infrastructure

drainage grate steel

Weldlok® Drainage Grates from Nepean are largely considered the industry benchmark amongst civil products. We here at Nepean are the only Australian manufacturer of drainage grates to offer a product which is load tested and NATA certified as well as complying to AS3996-2006.

NATA Testing

Drainage grates are batch load class tested in our own NATA-accredited load test facility. Test reports are available on request, subject to conditions.

The National Association of Testing Authorities (NATA) is Australia's Government-endorsed provider of accreditation for laboratories.

Hydraulic Performance

Weldlok® Forgebar® grating provides superior hydraulic flow over traditional cast iron grates.

Pedestrian & Bicycle Safe

Weldlok® grates are suitable for both pedestrian and bicycle traffic applications.


  • Manufactured from steel grade HA250
  • Cross bars are forge-welded into the load bars, providing one-piece construction
  • Every load bar is welded to the edging bars
  • Heavy-duty fixed hinge pins
  • Handle-shaped concrete tie-ins

drainage grates road

Load Class Selection

Unless stated otherwise, the stormwater grates detailed in our brochure are manufactured to comply with the load classes shown in the tables shown.

Features of our drainage products:

  • Designed to AS3996-2006
  • Class rated A to D Class
  • Hinged Pit Covers
  • Surcharge Pit Covers
  • Dish Crossing Grates
  • Roll Formed Kerb Grates
  • Trench Grates & Frames
  • Custom Grates & Frames
  • Gully Grates
  • Weep Holes & Step Irons

NEPEAN B & I Profile

02 9707 5088

117-153 Rockwood Road, Yagoona, NSW, 2199

NEPEAN B & I Profile

02 9707 5088



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