100 Series Steel Posts

100 Series Galvanised Steel Posts — Standard Residential Retaining Wall Posts

The 100 Series is our standard residential steel post range, suitable for concrete sleeper retaining walls up to approximately 1.0m in stable, well-drained soils. Available in both H-Beam (100 UC 14.8) and C-Channel (100 PFC) sections, plus 45° and 90° corner joiner posts for changes in wall direction.

When to Use 100 Series Posts

• Walls up to approximately 1.0m in stable, well-drained soils
• Sandy, loam, or well-compacted fill sites with low surcharge loads
• Garden walls, terracing, and low boundary walls
• Where engineer certification is not required

100 Series Post Options

• 100 UC 14.8 H-Beam — universal column section, higher bending strength, preferred for clay soils
• 100 PFC C-Channel — parallel flange channel, standard residential specification
• 45° Corner Joiner — for angled wall layouts
• 90° Corner Joiner — for right-angle corners and boundary walls

For walls over 1.0m or reactive clay sites, see our 150 Series Heavy Duty Posts. Read our Post Embedment Guide to determine the correct post length for your wall height.