{"product_id":"galvanised-steel-corner-posts-100mm","title":"Galvanised Steel Corner Posts 100mm","description":"\u003ch2\u003eGalvanised Steel Corner Posts 100mm\u003c\/h2\u003e\n\n\u003cp\u003eGalvanised Steel Corner Posts 100mm are designed for concrete sleeper retaining wall systems where the wall changes direction at a corner. These posts provide a strong, clean connection point for 90-degree retaining wall corners, helping concrete sleepers sit securely in both wall directions while maintaining a neat and structurally stable corner detail.\u003c\/p\u003e\n\n\u003cp\u003eManufactured from galvanised steel, these 100mm corner posts provide long-term protection against corrosion, soil moisture, weather exposure, termites, insects, and fire. They are commonly used with concrete sleeper retaining walls in residential landscaping, boundary walls, garden walls, raised garden beds, driveway retaining walls, and stepped retaining wall layouts.\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 corner post for concrete sleeper retaining walls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost type:\u003c\/strong\u003e 100mm corner post\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical corner angle:\u003c\/strong\u003e 90-degree retaining wall corner\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 Wall corners, returns, L-shaped retaining walls, garden bed corners, and boundary wall direction changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable lengths:\u003c\/strong\u003e 800mm, 1200mm, 1600mm, 2000mm, and 2400mm\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 sleeper thickness, footing design, drainage, and post spacing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n\n\u003cp\u003eGalvanised Steel Corner Posts 100mm are available in multiple lengths so the correct post can be selected to suit the finished wall height, required embedment depth, soil conditions, wall layout, and engineering requirements. The total post length must allow for both the visible retaining wall height above ground and the required in-ground footing 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\u003e800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow garden corners, small retaining wall returns, raised garden beds, and shallow landscape walls.\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;\"\u003eLow residential retaining wall corners where additional embedment depth is needed.\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 garden and boundary retaining wall corners 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;\"\u003eMedium retaining wall corners where extra post length and footing depth are required.\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;\"\u003eHigher corner sections, stepped wall returns, and engineer-approved retaining wall layouts requiring deeper embedment.\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 corner post is used where a concrete sleeper retaining wall changes direction, most commonly at a 90-degree corner. Unlike a standard C post that supports sleepers from one side, or an H post that supports sleepers in a straight continuous run, a corner post is shaped to receive sleepers from two directions. This allows the wall to turn neatly while keeping both wall faces aligned.\u003c\/p\u003e\n\n\u003cp\u003eCorner posts are important because corners can concentrate load and create alignment challenges during installation. A correctly selected galvanised steel corner post helps keep the wall square, supports the sleeper ends, and provides a clean structural transition between the two wall runs.\u003c\/p\u003e\n\n\u003cp\u003ePost selection should always consider wall height, soil type, footing depth, drainage, surcharge loads, and whether the wall is supporting a fence, driveway, structure, or sloping ground above. For walls over 1.0m, clay soil sites, surcharge conditions, or engineer-specified projects, post size, footing depth, and post spacing should be confirmed before installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Use Galvanised Steel Corner Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e90-degree wall corners:\u003c\/strong\u003e Use corner posts where the retaining wall turns at a right angle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL-shaped retaining walls:\u003c\/strong\u003e Ideal for garden beds, boundary walls, and landscape walls with return sections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaised garden bed corners:\u003c\/strong\u003e Provides a clean steel corner detail for concrete sleeper planter walls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoundary wall returns:\u003c\/strong\u003e Helps connect two retaining wall runs where a boundary changes direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStepped wall layouts:\u003c\/strong\u003e Useful where walls change direction across sloping or uneven sites.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeater installation:\u003c\/strong\u003e Helps maintain alignment at corners and reduces the need for improvised corner connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCorner Posts vs C Posts and H Posts\u003c\/h3\u003e\n\n\u003cp\u003eEach retaining wall post type has a specific role. C posts are generally used at the start or end of a wall run where sleepers are supported from one side. H posts are used in the middle of straight wall runs where sleepers continue from one bay to the next. Corner posts are used where the wall changes direction and sleepers need to be supported from two angled directions.\u003c\/p\u003e\n\n\u003cp\u003eUsing the correct post type improves wall alignment, reduces installation issues, and helps the retaining wall system perform as intended. For a complete concrete sleeper retaining wall, most projects use a combination of C posts, H posts, and corner posts depending on the wall layout.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eCorrect installation is critical for retaining wall performance. Galvanised Steel Corner Posts should be set plumb or to the required back lean, aligned carefully with both wall runs, and embedded into correctly sized concrete footings. The two connecting wall runs should be set out before concreting the corner post so the post sits square and sleepers can be installed cleanly.\u003c\/p\u003e\n\n\u003cp\u003eThe footing must be deep and wide enough to resist lateral earth pressure from the retained soil. Corner posts can be subject to load from two directions, so footing size, embedment depth, soil type, and drainage should be carefully considered. Where engineering drawings are supplied, always follow the specified post size, footing depth, concrete strength, and post spacing.\u003c\/p\u003e\n\n\u003cp\u003eDrainage should always be installed behind the retaining wall. A suitable 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 Steel Corner Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean corner connection:\u003c\/strong\u003e Designed to create a neat 90-degree retaining wall corner.\u003c\/li\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\u003eStrong steel construction:\u003c\/strong\u003e Provides a durable corner support compared with timber alternatives.\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 several post lengths to suit low and medium retaining wall corner details.\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 C-channel option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-c-posts-100mm-100pfc\"\u003eGalvanised Steel C Posts – 100mm 100PFC\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty C-channel option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-c-posts-150mm-150pfc\"\u003eGalvanised Steel C Posts – 150mm 150PFC\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\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 Corner Posts 100mm are available in 800mm, 1200mm, 1600mm, 2000mm, and 2400mm 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":"RetainingWallsDirect","offers":[{"title":"800mm","offer_id":52287822430488,"sku":null,"price":74.61,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52287822463256,"sku":null,"price":111.91,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52287822496024,"sku":null,"price":149.22,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52287822528792,"sku":null,"price":186.53,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52287823216920,"sku":null,"price":223.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/100-PFC-90-Degree-Channel-Retaining-Wall-Postscopy-fotor-20240320214755.png?v=1781584273","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/galvanised-steel-corner-posts-100mm","provider":"Retaining Walls Direct","version":"1.0","type":"link"}