150 Series Steel Posts

150 Series Galvanised Steel Posts — Heavy Duty for Walls 1.0m–1.8m

The 150 Series is our heavy duty steel post range, engineered for concrete sleeper retaining walls between 1.0m and 1.8m in height, reactive clay soils, elevated surcharge loads, and sites where additional structural capacity is required. The larger section size provides significantly greater bending strength and stiffness compared to the 100 Series.

When to Use 150 Series Posts

• Walls between 1.0m and 1.8m in height
• Reactive clay soils that expand and contract seasonally (common across Brisbane, Melbourne, Adelaide, and Perth eastern suburbs)
• Sites with elevated surcharge loads — driveways, vehicles, structures, or slopes
• Where engineer certification is required or recommended
• Coastal and high-moisture environments requiring additional corrosion resistance

150 Series Post Options

• 150 UC 30 H-Beam — universal column section, maximum bending strength for demanding sites
• 150 PFC C-Channel — parallel flange channel, heavy duty residential and light commercial
• 45° Corner Joiner — for angled wall layouts at 150 Series specification
• 90° Corner Joiner — for right-angle corners at 150 Series specification

For the most demanding structural applications, see our 200 Series Engineered Posts. For standard residential walls under 1.0m, see our 100 Series Posts.