Galvanised C-channel (PFC) steel posts are the channel-section posts used to start, end and join concrete sleeper retaining walls. Sleepers locate into the open channel, which makes PFC posts ideal for wall ends, starts, corners and step-downs, and for lighter residential walls. Hot-dip galvanised for long-term corrosion resistance in Australian conditions and delivered Australia-wide by Retaining Walls Direct.
A PFC (Parallel Flange Channel) post has a C-shaped section with one open face. Because the sleepers seat into that channel, PFC posts are most often used as end and start posts, at corners and step-downs, and on lower walls where a full H-beam isn't required. For intermediate (middle) posts that carry sleepers on both sides, and for taller walls, pair them with galvanised H-beam posts.
Post size, spacing and embedment depth depend on wall height, soil type and surcharge load. Use our steel post sizing guide to match a post to your wall, or have it confirmed by a qualified engineer.
C-channel posts pair with our concrete sleepers and H-beam posts, plus drainage and brackets & hardware. New to it? See how to build a concrete sleeper retaining wall.
Steel posts are heavy and oversized — delivered Australia-wide; send your postcode and quantities for a freight quote. Walls over 1m, on reactive soils, or near boundaries, driveways and structures should be designed by a qualified engineer and may need council approval — see walls over 1 metre. Get a free quote.
