45 Degree Corner Steel Post 150 Series Melbourne VIC

45 Degree Corner Steel Posts — 150 Heavy Duty Series — Melbourne & Victoria

When a retaining wall over 1.5m needs to turn at a 45-degree angle, the standard 100 Series corner post doesn't have the structural capacity to do the job safely — particularly on Melbourne's reactive basalt clay soils where lateral soil pressure increases dramatically with wall height. The 150 Series 45-degree corner post solves this problem: a purpose-engineered heavy duty corner component with a 150mm flange width, designed to accept concrete sleepers on both angled faces while delivering the bending resistance that tall, angled walls on challenging Melbourne sites demand.

Why the 150 Series Corner Matters on Melbourne Sites

Corner posts are the most structurally complex point in any retaining wall — they receive lateral loads from two directions simultaneously. On a standard low wall in stable ground, a 100 Series corner handles this comfortably. But on a 1.5m+ wall on the reactive Coode Island Silt of Melbourne's inner west, or the expansive basalt clay of Craigieburn and Mickleham, the combined bi-directional loading at a corner can exceed the capacity of a 100 Series post. The 150 Series corner provides the additional section modulus to handle these loads with an appropriate factor of safety.

Features & Specifications

• Hot-dip galvanised to AS/NZS 4680 for long-term performance in Victoria's variable soil and climate conditions
• 150mm flange width — greater bending resistance than 100 Series in both load directions
• Accepts 75mm, 100mm, and 120mm concrete sleepers on both angled faces
• Pre-drilled and ready to install — eliminates the need for site fabrication on complex wall layouts
• Designed to integrate seamlessly with the full 150 Heavy Duty Series post system
• Suitable for walls from 1.5m to 2.0m at angled corners (engineer certification mandatory above 1.0m in VIC)

Typical Applications in Melbourne

• Angled boundary walls over 1.5m on irregular allotments in Melbourne's middle ring suburbs including Box Hill, Doncaster, and Glen Waverley
• Driveway retaining walls on steep Yarra Valley and Dandenong Ranges properties where the wall turns at an angle to follow the driveway alignment
• Engineer-specified retaining structures on reactive clay sites where the wall layout is dictated by site constraints rather than a standard grid
• Commercial landscaping projects in Melbourne's outer growth corridors where wall heights and soil conditions exceed residential norms

VIC Building Permit & Engineering Requirements

All retaining walls over 1.0m in Victoria require a building permit and a structural engineer's certification under the Victorian Building Authority framework. For 150 Series corner posts, a full engineered design is strongly recommended regardless of height given the complexity of bi-directional corner loading. Refer to AS 4678-2002 — Earth Retaining Structures for design guidance, and check Victorian Planning for any overlay requirements in your suburb.

Delivery Across Melbourne & Victoria

We deliver 150 Series corner posts direct to your site across Melbourne metro, Geelong, the Mornington Peninsula, Yarra Valley, Ballarat, Bendigo, and regional VIC. Bulk and trade pricing available — open a trade account for priority pricing and faster dispatch.

Related Products

• 150 Heavy Duty Series — Melbourne VIC
• 90 Degree Corner 150 Series — Melbourne VIC
• 45 Degree Corner 100 Series — Melbourne VIC
• Retaining Wall Steel Posts — Melbourne VIC
• 50MPa Concrete Sleepers — Melbourne VIC

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