250 Heavy Duty Series Steel Posts Brisbane & Queensland

250 Heavy Duty Series Steel Posts for Retaining Walls — Brisbane & Queensland

The 250 Heavy Duty Series is the pinnacle of our steel post range — maximum section modulus, maximum structural capacity, and engineered for Queensland's most demanding civil and commercial retaining wall applications. Walls over 2.5m, major road and infrastructure surcharge loads, flood mitigation structures, and high-risk retaining applications all demand the 250 Series. These posts are specified exclusively by structural engineers for projects where the consequences of failure are severe. Retaining Walls Direct has supplied heavy duty civil-grade posts to Queensland engineers and contractors for over 40 years.

Features & Specifications

• Hot-dip galvanised to AS/NZS 4680 — maximum corrosion resistance for long-service civil applications
• 250mm flange width — the maximum standard section modulus in our post range
• Available in H-Beam (UC) profile for maximum bending resistance
• Engineered to accept 75mm and 100mm concrete sleepers
• Suitable for walls from 2.5m to 4.0m+ (full structural engineering design mandatory)
• Specified for civil infrastructure, flood mitigation, road cuttings, and major commercial retaining applications across Queensland

When to Specify the 250 Series

The 250 Heavy Duty Series is required when:

• Your wall exceeds 2.5m in height
• The project involves civil infrastructure — road cuttings, embankments, flood mitigation, or major earthworks
• Surcharge loading is extreme — heavy vehicle traffic, rail loads, or large structures immediately above the wall
• Your structural engineer has specified 250 Series posts in a full engineered retaining wall design
• The project is subject to Queensland Government or local government infrastructure standards

For walls under 2.5m, see our 200 Heavy Duty Series Brisbane or 150 Heavy Duty Series Brisbane.

Engineering & Compliance

250 Series retaining walls require a full structural engineering design and development approval without exception. These projects are subject to the full requirements of AS 4678-2002 — Earth Retaining Structures and relevant Queensland infrastructure standards. Key references:

• QBCC — Building Approvals Queensland
• Queensland Department of Transport and Main Roads — Infrastructure Standards
• Queensland Planning — Development Assessment
• Retaining Wall Regulations — State-by-State Guide

Delivery Across Brisbane & Queensland

We deliver 250 Series steel posts direct to your site across Brisbane metro, the Gold Coast, Sunshine Coast, Ipswich, Logan, Moreton Bay, and regional QLD. Bulk and trade pricing available — open a trade account for priority pricing and faster dispatch.

Related Products

• 200 Heavy Duty Series — Brisbane & QLD
• 150 Heavy Duty Series — Brisbane & QLD
• Retaining Wall Steel Posts — Brisbane QLD
• 50MPa Concrete Sleepers — Brisbane & QLD
• Concrete Sleepers — Brisbane QLD

Guides & Resources

• H-Beam vs C-Channel Steel Posts — Which Do You Need?
• Engineering & Council Rules for Retaining Walls in Australia
• Retaining Wall Regulations — State-by-State Guide