NEPEAN Building & Infrastructure

Official Credentials

Business Profile

NEPEAN Building & Infrastructure is an integrated manufacturer of fabricated metal products and hot-dip galvanising services. Proudly supplying the architectural, civil, construction, industrial and mining markets throughout Australia with our unique hybrid supply chain model. Established in 1955 as the Graham Group in Yagoona, NSW, we have evolved by providing highly specialised solutions and tailored support. Our industrial manufacturing, galvanising facilities, and support branches service customers nationally, employing over 260 highly skilled individuals. Our Australian and international manufacturing sites are committed to quality, safety and compliance with an integrated quality management system. Facilities hold relevant accreditation for quality ISO 9001:2015, environment ISO 14001:2015 and safety ISO 45001:2018.

Products and Services

  • Access Covers
  • Aluminium Grating
  • Aluminium Handrail Systems
  • Building Lintels
  • Drainage Grates
  • Expanded Metals
  • Flat Bar
  • FRP Grating
  • FRP Handrail Systems
  • Galv Handrail Systems
  • Hot-Dip Galvanising
  • Perforated Metals
  • Stainless Steel Grating
  • Stainless Steel Handrail Systems
  • Stair Stringers
  • Steel Grating
  • Safety and Access Solutions
  • Residential Building Products


  • ISO 9001:2015 Quality System
  • ISO 14001:2015 Environmental System
  • ISO 45001:2018 Safety System
  • Master Builders Association
  • Australian Steel Institute - Sustainability Charter - Platnium
  • Galvanisers Association
  • NATA Accredited Laboratory - ISO/IEC 17025 - #12043
  • SAI Global 3rd party product approvals to AS3996-2019 (certificate SMK40898)
  • WSAA appraisal (PA-2046)
  • Weldlok currently hold the below authority approvals
  • Sydney Water
  • Icon Water
  • Hunter Water
  • City West Water (MLB)
  • SEQ (South East QLD)
  • QUU (Queensland Urban Utility)
  • Unity Water
  • TMR QLD (Transport & Main Roads)

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Contact Details

Head Office
117-153 Rookwood Rd
Yagoona NSW 2199
ABN  54125224302

Other Locations

Coffs Harbour NSW
Brendale QLD
Derrimut VIC
Belmont WA
+61 13 0073 0462
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