90 Degree Corner Steel Post Canberra ACT

90 Degree Corner Steel Posts for Retaining Walls — Canberra & ACT

The 90-degree corner steel post is one of the most frequently used components in any retaining wall project — wherever your wall turns a right angle at a boundary, garden bed edge, or driveway. Our 90-degree corner posts are purpose-engineered to accept concrete sleepers on both faces at a true right angle, delivering a clean, structurally sound corner without site fabrication or welding. Built to handle Canberra's frost conditions, reactive clay soils, and extreme temperature swings, these posts are hot-dip galvanised and ready to install. Retaining Walls Direct has supplied ACT builders, landscapers, and homeowners for over 40 years.

Features & Specifications

• Hot-dip galvanised to AS/NZS 4680 — frost and corrosion resistant for ACT conditions
• Accepts 75mm and 100mm concrete sleepers on both perpendicular faces
• Available in 100 Series (standard residential) and 150 Heavy Duty Series
• Pre-drilled and ready to install — no welding or cutting required on site
• Compatible with C-Channel and H-Beam post systems
• Suitable for walls up to 1.8m (engineer sign-off required above 1.0m in ACT)

When Do You Need a 90 Degree Corner Post?

Use a 90-degree corner post wherever your retaining wall meets at a right angle. Typical applications across Canberra include:

• Boundary retaining walls turning at property corners across Belconnen, Tuggeranong, and Gungahlin
• Raised garden beds with square or rectangular layouts on sloped ACT blocks
• Driveway retaining walls meeting a side fence line
• Pool surrounds and level change structures
• Tiered retaining systems on Canberra's characteristically sloped residential blocks

For angled turns that aren't 90 degrees, see our 45 Degree Corner Steel Posts Canberra. For straight-run end terminations, see our End Posts & Joiners.

ACT Planning & Engineering Requirements

Retaining walls over 1.0m in the ACT require development approval and a structural engineer's certification. Key references:

• ACT Planning — Development Applications
• AS 4678-2002 — Earth Retaining Structures
• Retaining Wall Regulations — State-by-State Guide

Delivery Across Canberra & ACT

We deliver 90-degree corner steel posts direct to your site across Canberra metro, Belconnen, Tuggeranong, Gungahlin, Woden, and surrounding ACT regions. Bulk and trade pricing available — open a trade account for priority pricing and faster dispatch.

Related Products

• Retaining Wall Steel Posts — Canberra ACT
• 45 Degree Corner Steel Posts — Canberra ACT
• C-Channel Steel Posts — Canberra ACT
• H-Beam Steel Posts — Canberra ACT
• Concrete Sleepers — Canberra ACT

Guides & Resources

• H-Beam vs C-Channel Steel Posts — Which Do You Need?
• How to Choose the Right Steel Post for Your Retaining Wall
• Retaining Wall Regulations — State-by-State Guide