{"product_id":"galvanised-steel-c-posts-100mm-100pfc","title":"Galvanised Steel C Posts – 100mm 100PFC","description":"\u003ch2\u003eGalvanised Steel C Posts – 100mm 100PFC\u003c\/h2\u003e\n\n\u003cp\u003eGalvanised Steel C Posts – 100mm 100PFC are used in concrete sleeper retaining wall systems where a strong, durable, and easy-to-install steel post is required. Also known as C-channel posts or PFC retaining wall posts, these galvanised steel posts are commonly used for wall ends, low retaining walls, garden walls, boundary walls, and straight retaining wall sections where the sleeper is supported from one side of the post.\u003c\/p\u003e\n\n\u003cp\u003eManufactured from galvanised steel, the 100PFC C Post provides long-term protection against outdoor exposure, soil moisture, corrosion, termites, insects, and fire. It is a practical steel post option for concrete sleeper retaining walls where a lighter post section is suitable and the wall design does not require a heavier H-beam or UC post.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Galvanised steel C post for concrete sleeper retaining walls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel section:\u003c\/strong\u003e 100PFC, also known as 100mm Parallel Flange Channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e C-channel steel retaining wall post\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Galvanised steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Concrete sleeper retaining wall systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical use:\u003c\/strong\u003e End posts, low wall posts, garden retaining walls, boundary retaining walls, and suitable straight wall sections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable lengths:\u003c\/strong\u003e 400mm, 600mm, 800mm, 1200mm, 1600mm, 2000mm, 2400mm, 2800mm, 3200mm, and 3600mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Strong, durable, termite resistant, fire resistant, weather resistant, and corrosion resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible wall systems:\u003c\/strong\u003e Concrete sleeper retaining walls using suitable sleepers, post spacing, footing design, and drainage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n\n\u003cp\u003e100PFC galvanised C posts are available in a wide range of lengths so the correct post can be selected for the finished wall height, footing depth, site levels, sleeper length, soil conditions, and engineering requirements. The total post length must allow for both the visible retaining wall height above ground and the required embedment depth below ground.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px; text-align:left;\"\u003ePost Length\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px; text-align:left;\"\u003eTypical Use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e400mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eVery low garden edging, small sleeper transitions, and low landscape wall details.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e600mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow garden beds, shallow retaining sections, and small landscaping projects.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow residential retaining walls, edging walls, and short wall sections.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e1200mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eSmall retaining walls where extra embedment depth is required below the visible wall height.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e1600mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eCommon low to medium residential retaining walls in suitable ground conditions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e2000mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eGeneral concrete sleeper retaining wall projects where a C-channel post is suitable.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e2400mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eMedium wall sections where additional post length is needed for footing embedment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e2800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eHigher wall sections where site conditions still allow a 100PFC C-channel specification.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e3200mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLonger C-post applications, stepped wall sections, and designs requiring deeper embedment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e3600mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLongest listed 100PFC C-post option for deep embedment and engineer-approved retaining wall layouts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTechnical Overview\u003c\/h3\u003e\n\n\u003cp\u003eA 100PFC C Post is a galvanised Parallel Flange Channel section used to support concrete sleepers from one side of the post. This makes it especially useful for retaining wall ends, boundary terminations, small garden walls, and low retaining wall sections where a full H-beam middle post is not required.\u003c\/p\u003e\n\n\u003cp\u003eThe C-shaped channel profile allows concrete sleepers to slide into the post opening, creating a neat and practical wall end or single-sided retaining wall support. For continuous straight wall runs where sleepers need to be supported on both sides of the post, an H-beam post is generally used instead.\u003c\/p\u003e\n\n\u003cp\u003ePost selection should always consider retained height, soil type, drainage, footing size, post spacing, surcharge load, and whether the wall supports a fence, driveway, structure, or sloping ground above. For walls over 1.0m, clay soil sites, surcharge conditions, or engineer-specified projects, confirm whether a heavier H-beam post is required.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Use 100PFC C Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall ends:\u003c\/strong\u003e C posts are commonly used at the start and end of concrete sleeper retaining wall runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow retaining walls:\u003c\/strong\u003e Suitable for many low garden and residential retaining wall applications where the design allows a C-channel post.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarden beds:\u003c\/strong\u003e A practical post option for raised garden beds, planter walls, and landscape edging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoundary walls:\u003c\/strong\u003e Useful for simple boundary retaining walls where post type and footing depth are suitable for the retained height.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-sided support:\u003c\/strong\u003e The C-channel profile supports sleepers from one side of the post.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCost-conscious projects:\u003c\/strong\u003e A practical option where a lighter C-post section is suitable and a heavier H-beam is not required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eC Posts vs H Posts\u003c\/h3\u003e\n\n\u003cp\u003eC posts and H posts are used for different roles in concrete sleeper retaining wall systems. A C post supports sleepers on one side only, making it suitable for wall ends and some low-wall applications. An H post supports sleepers on both sides, making it the correct post type for middle bays where the wall continues from one sleeper bay into the next.\u003c\/p\u003e\n\n\u003cp\u003eFor lower walls in stable ground, C posts may be a practical and cost-effective option. For taller walls, reactive clay sites, surcharge loads, fence-over-wall applications, driveways, or engineer-specified designs, H posts are generally preferred because they provide greater stiffness and support.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eCorrect installation is critical for retaining wall performance. 100PFC C posts should be set plumb or to the required back lean, spaced to suit the selected concrete sleeper length, and embedded into concrete footings sized for the wall height and soil conditions.\u003c\/p\u003e\n\n\u003cp\u003eThe footing must be deep and wide enough to resist lateral earth pressure from the retained soil. As wall height increases, the required post length, footing depth, footing diameter, and concrete volume usually increase as well. Where engineering drawings are supplied, always follow the specified post size, post spacing, footing depth, and concrete strength.\u003c\/p\u003e\n\n\u003cp\u003eDrainage should always be installed behind the wall. A suitable retaining wall drainage system normally includes free-draining aggregate, geotextile fabric, and slotted agricultural pipe at the base of the wall discharging to a legal outlet. Poor drainage can increase hydrostatic pressure behind the sleepers and may lead to movement, leaning, cracking, or wall failure.\u003c\/p\u003e\n\n\u003ch3\u003eBenefits of Galvanised 100PFC C Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanised protection:\u003c\/strong\u003e Helps protect the steel from corrosion, soil moisture, and outdoor exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical C-channel profile:\u003c\/strong\u003e Designed to support concrete sleepers from one side of the post.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrong steel construction:\u003c\/strong\u003e Provides a more durable post option than timber in ground-contact retaining wall applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermite resistant:\u003c\/strong\u003e Steel is not affected by termites, borers, or other insects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire resistant:\u003c\/strong\u003e Galvanised steel provides better fire resistance than timber retaining wall posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple lengths:\u003c\/strong\u003e Available in short and long options to suit low walls, garden walls, stepped sections, and deeper footing requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow maintenance:\u003c\/strong\u003e No timber treatment, staining, or regular replacement is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Products\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete sleeper range:\u003c\/strong\u003e \u003ca href=\"\/collections\/concrete-sleepers\"\u003eConcrete Retaining Wall Sleepers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard H post option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-h-posts-100mm-100uc-uc-14-8\"\u003eGalvanised Steel H Posts 100mm 100UC – UC 14.8\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty H post option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-h-posts-150mm-uc23-4\"\u003eGalvanised Steel H Posts 150mm UC23.4\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eH post with reo option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-h-post-with-reo-100uc\"\u003eGalvanised Steel H Post with Reo | 100UC\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner and end post option:\u003c\/strong\u003e \u003ca href=\"\/products\/corner-l-post-joiner-end-post-for-retaining-walls\"\u003eCorner, L-Post, Joiner and End Posts for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrainage product:\u003c\/strong\u003e \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003eDrainage Kit for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFabric and wall protection:\u003c\/strong\u003e \u003ca href=\"\/products\/geotextile-fabric-wall-liner-for-retaining-walls\"\u003eGeotextile Fabric and Wall Liner for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGuides and Resources\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost comparison guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/how-to-choose-retaining-wall-post-c-channel-vs-h-beam\"\u003eHow to Choose the Right Retaining Wall Post: C-Channel vs H-Beam\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost spacing guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/retaining-wall-post-spacing-guide\"\u003eRetaining Wall Post Spacing: How Far Apart Should Posts Be?\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFooting depth guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/retaining-wall-footings-depth-concrete\"\u003eRetaining Wall Footings: Depth, Size and Concrete Guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/how-to-build-concrete-sleeper-retaining-wall\"\u003eHow to Build a Concrete Sleeper Retaining Wall\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrainage guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003eRetaining Wall Drainage Guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurcharge load guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/what-is-surcharge-load-retaining-walls\"\u003eWhat Is a Surcharge Load? Why It Matters for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\n\u003cp\u003eGalvanised Steel C Posts – 100mm 100PFC are available in 400mm, 600mm, 800mm, 1200mm, 1600mm, 2000mm, 2400mm, 2800mm, 3200mm, and 3600mm lengths. Delivery is available across Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Gold Coast, and regional Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eGet a free quote\u003c\/a\u003e for your retaining wall project.\u003c\/p\u003e\n","brand":"Retaining Walls Direct","offers":[{"title":"400mm","offer_id":52287804965144,"sku":null,"price":16.14,"currency_code":"AUD","in_stock":true},{"title":"600mm","offer_id":52287804997912,"sku":null,"price":24.21,"currency_code":"AUD","in_stock":true},{"title":"800mm","offer_id":52287805030680,"sku":null,"price":32.29,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52287805096216,"sku":null,"price":48.44,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52287805161752,"sku":null,"price":64.58,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52287805227288,"sku":null,"price":80.73,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52287810568472,"sku":null,"price":96.88,"currency_code":"AUD","in_stock":true},{"title":"2800mm","offer_id":52287810601240,"sku":null,"price":113.02,"currency_code":"AUD","in_stock":true},{"title":"3200mm","offer_id":52287810634008,"sku":null,"price":133.62,"currency_code":"AUD","in_stock":true},{"title":"3600mm","offer_id":52287810666776,"sku":null,"price":145.32,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/pfc100.jpg?v=1781578129","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/galvanised-steel-c-posts-100mm-100pfc","provider":"Retaining Walls Direct","version":"1.0","type":"link"}