The 150 PFC C-channel post is the heavy duty open-profile steel post for Melbourne retaining walls on moderately reactive soils and walls approaching 1.2–1.5m — providing greater lateral strength than 100 Series while retaining the practical side-loading installation advantage of the C-channel profile. Retaining Walls Direct supplies 150 PFC C-channel posts to Melbourne builders, landscapers, and fencing contractors, delivered direct to site.
Compliant with AS/NZS 3678 and AS 4100, hot-dip galvanised to G300 specification. The open C-profile allows concrete sleepers to be slid in from the side during installation — a significant practical advantage on tight Melbourne residential sites where crane access is limited.
The 150 PFC suits Melbourne walls on Class M to H1 reactive soils at heights between 1.0m and 1.5m — common in Melbourne's middle-ring eastern suburbs (Doncaster, Box Hill, Nunawading) and bayside areas. For Class H2 or E reactive clays in Melbourne's outer suburbs, or walls over 1.5m, upgrade to the 150 UC H-beam for superior bi-directional strength. Always confirm post selection with a structural engineer for walls over 1.0m — VBA permit required.
Space at 1.8–2.0m centres. Embed minimum one-third of total wall height below ground, minimum 600mm. For reactive clay soils, concrete encasement of post bases is recommended — confirm with your engineer. See our Steel Post Sizing Guide for full Melbourne guidance.
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