{"title":"Corner \u0026 Joiner Posts","description":"\u003cp\u003eRetaining Walls Direct stocks a full range of corner and joiner steel posts for retaining walls and fencing — including 90° corner posts, 45° corner posts, and inline joiner posts. All posts are hot-dip galvanised for long-term durability in Australian conditions and are designed to integrate seamlessly with our H-beam and C-channel post range.\u003c\/p\u003e\u003cp\u003eCorner and joiner posts are essential for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e90° and 45° wall returns and changes in direction\u003c\/li\u003e\n\u003cli\u003eJoining two wall runs at a boundary corner\u003c\/li\u003e\n\u003cli\u003eCreating L-shaped, U-shaped, or terraced retaining wall layouts\u003c\/li\u003e\n\u003cli\u003eMaintaining structural continuity at wall junctions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAvailable in 100 Series, 150 Series, and 200 Series to match your wall's load requirements. View our full \u003ca href=\"\/collections\/steel-posts\"\u003eSteel Posts range\u003c\/a\u003e for compatible H-beam and C-channel options, or use our \u003ca href=\"\/pages\/steel-post-sizing-guide\"\u003eSteel Post Sizing Guide\u003c\/a\u003e to confirm the right series for your project. \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003eContact our team\u003c\/a\u003e for trade pricing and bulk orders.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFor walls over 1m or at boundary junctions, always consult a qualified structural engineer and check local council requirements.\u003c\/em\u003e\u003c\/p\u003e","products":[{"product_id":"galvanised-steel-90-corner-post-100pfc","title":"Galvanised Steel 90° Corner Post 100PFC","description":"\u003cp\u003e\u003cstrong\u003eThe galvanised steel 90° corner post is fabricated from two 100PFC C-channels factory-welded at a right angle — for wherever a retaining wall turns 90 degrees.\u003c\/strong\u003e Ideal for boundary corners, L-shaped and U-shaped walls. Hot-dip galvanised to AS\/NZS 4680, in 800–2400mm. Australian-made, delivered Australia-wide by Retaining Walls Direct.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWritten and product-checked by the Retaining Walls Direct team — supplying steel-post retaining wall systems across Australia. Last updated: June 2026.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003e90° corner post (2×100PFC)\u003c\/h2\u003e\n\u003cp\u003eThe corner post accepts \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleepers\u003c\/a\u003e from both perpendicular directions, giving a clean right-angle return with no visible site-welded joins. Use with \u003ca href=\"\/collections\/steel-posts\"\u003eH-beam middle posts and C-channel end posts\u003c\/a\u003e to complete the wall.\u003c\/p\u003e\n\n\u003ch3\u003eHow to choose the right length\u003c\/h3\u003e\n\u003cp\u003ePost length = retained height above ground \u003cstrong\u003eplus embedment\u003c\/strong\u003e (roughly double the wall height as a starting guide; confirm by engineering). See the \u003ca href=\"\/pages\/steel-post-sizing-guide\"\u003esteel post sizing guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSection\u003c\/th\u003e\n\u003ctd\u003e2 × 100PFC welded at 90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRole\u003c\/th\u003e\n\u003ctd\u003eCorner post — accepts sleepers both perpendicular directions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLengths\u003c\/th\u003e\n\u003ctd\u003e800 – 2400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003e75mm \u0026amp; 80mm concrete and timber sleepers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalvanising\u003c\/th\u003e\n\u003ctd\u003eHot-dip galvanised to AS\/NZS 4680\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eAS 4678-2002 · factory welded (not site-welded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRetaining Walls Direct (Australian-made)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eComplete your retaining wall\u003c\/h3\u003e\n\u003cp\u003eAdd \u003ca href=\"\/collections\/hardware-brackets-cleats-rwd\"\u003ecaps, brackets \u0026amp; hardware\u003c\/a\u003e and drainage — a \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003edrainage kit\u003c\/a\u003e, \u003ca href=\"\/products\/ag-pipe-100mm-x-20m-slotted-socked-drain-coil\"\u003eag pipe\u003c\/a\u003e and \u003ca href=\"\/products\/geo-matting\"\u003egeo matting\u003c\/a\u003e. See \u003ca href=\"\/blogs\/news\/how-to-build-concrete-sleeper-retaining-wall\"\u003ehow to build a concrete sleeper retaining wall\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering \u0026amp; council\u003c\/h3\u003e\n\u003cp\u003eFor walls over 1.0m, reactive clay or surcharge loads, consult a structural engineer (\u003ca href=\"\/pages\/engineered-retaining-walls-over-1m\"\u003eengineered walls over 1 metre\u003c\/a\u003e) and plan \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003edrainage\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eBuying with confidence\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia-wide delivery\u003c\/strong\u003e with a same-day freight quote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoogle-reviewed service\u003c\/strong\u003e and trade support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e no change-of-mind on made-to-order heavy goods; cancellations before dispatch refunded within 5 business days; faulty\/incorrect always rectified — see our \u003ca href=\"\/pages\/returns-delivery-refund-policy\"\u003ereturns \u0026amp; delivery policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eSend your postcode and quantities for a freight quote\u003c\/a\u003e, or \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003econtact the team\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhen do I need a corner post?\u003c\/strong\u003e\u003cbr\u003eWherever the wall turns 90° — boundary corners, L-shaped and U-shaped walls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it welded on site?\u003c\/strong\u003e\u003cbr\u003eNo — it's factory-welded for structural integrity, then hot-dip galvanised.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sleepers does it fit?\u003c\/strong\u003e\u003cbr\u003e75mm and 80mm concrete and timber sleepers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you deliver to me?\u003c\/strong\u003e\u003cbr\u003eWe deliver across most of Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eSend your postcode and quantities\u003c\/a\u003e for a freight estimate.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"800mm","offer_id":52324331159832,"sku":null,"price":71.72,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52324331192600,"sku":null,"price":107.58,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52324331225368,"sku":null,"price":143.44,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52324331258136,"sku":null,"price":179.3,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52324331323672,"sku":null,"price":215.16,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/galvanised-steel-90-degree-corner-post-100pfc.png?v=1782362664"},{"product_id":"galvanised-steel-45-angle-post-100pfc","title":"Galvanised Steel 45° Angle Post 100PFC","description":"\u003cp\u003e\u003cstrong\u003eThe galvanised steel 45° angle post is fabricated from two 100PFC C-channels factory-welded at 45 degrees — for wherever a retaining wall changes direction on a diagonal.\u003c\/strong\u003e Ideal for angled boundaries and irregular block shapes. Hot-dip galvanised to AS\/NZS 4680, in 800–2400mm. Australian-made, delivered Australia-wide by Retaining Walls Direct.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWritten and product-checked by the Retaining Walls Direct team — supplying steel-post retaining wall systems across Australia. Last updated: June 2026.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003e45° angle post (2×100PFC)\u003c\/h2\u003e\n\u003cp\u003eThe angle post accepts \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleepers\u003c\/a\u003e from two 45° directions for a clean diagonal change — common on angled property boundaries. Use with \u003ca href=\"\/collections\/steel-posts\"\u003eH-beam middle posts and C-channel end posts\u003c\/a\u003e to complete the wall.\u003c\/p\u003e\n\n\u003ch3\u003eHow to choose the right length\u003c\/h3\u003e\n\u003cp\u003ePost length = retained height above ground \u003cstrong\u003eplus embedment\u003c\/strong\u003e (roughly double the wall height as a starting guide; confirm by engineering). See the \u003ca href=\"\/pages\/steel-post-sizing-guide\"\u003esteel post sizing guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSection\u003c\/th\u003e\n\u003ctd\u003e2 × 100PFC welded at 45°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRole\u003c\/th\u003e\n\u003ctd\u003eAngle post — accepts sleepers from two 45° directions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLengths\u003c\/th\u003e\n\u003ctd\u003e800 – 2400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003e75mm \u0026amp; 80mm concrete and timber sleepers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGalvanising\u003c\/th\u003e\n\u003ctd\u003eHot-dip galvanised to AS\/NZS 4680\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eAS 4678-2002 · factory welded (not site-welded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRetaining Walls Direct (Australian-made)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eComplete your retaining wall\u003c\/h3\u003e\n\u003cp\u003eAdd \u003ca href=\"\/collections\/hardware-brackets-cleats-rwd\"\u003ecaps, brackets \u0026amp; hardware\u003c\/a\u003e and drainage — a \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003edrainage kit\u003c\/a\u003e, \u003ca href=\"\/products\/ag-pipe-100mm-x-20m-slotted-socked-drain-coil\"\u003eag pipe\u003c\/a\u003e and \u003ca href=\"\/products\/geo-matting\"\u003egeo matting\u003c\/a\u003e. See \u003ca href=\"\/blogs\/news\/how-to-build-concrete-sleeper-retaining-wall\"\u003ehow to build a concrete sleeper retaining wall\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering \u0026amp; council\u003c\/h3\u003e\n\u003cp\u003eFor walls over 1.0m, reactive clay or surcharge loads, consult a structural engineer (\u003ca href=\"\/pages\/engineered-retaining-walls-over-1m\"\u003eengineered walls over 1 metre\u003c\/a\u003e) and plan \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003edrainage\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eBuying with confidence\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia-wide delivery\u003c\/strong\u003e with a same-day freight quote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoogle-reviewed service\u003c\/strong\u003e and trade support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e no change-of-mind on made-to-order heavy goods; cancellations before dispatch refunded within 5 business days; faulty\/incorrect always rectified — see our \u003ca href=\"\/pages\/returns-delivery-refund-policy\"\u003ereturns \u0026amp; delivery policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eSend your postcode and quantities for a freight quote\u003c\/a\u003e, or \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003econtact the team\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhen do I need a 45° angle post?\u003c\/strong\u003e\u003cbr\u003eWherever the wall changes direction on a 45° diagonal — angled boundaries and irregular blocks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it welded on site?\u003c\/strong\u003e\u003cbr\u003eNo — factory-welded for structural integrity, then hot-dip galvanised.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat sleepers does it fit?\u003c\/strong\u003e\u003cbr\u003e75mm and 80mm concrete and timber sleepers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you deliver to me?\u003c\/strong\u003e\u003cbr\u003eWe deliver across most of Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eSend your postcode and quantities\u003c\/a\u003e for a freight estimate.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"800mm","offer_id":52324331421976,"sku":null,"price":77.0,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52324331454744,"sku":null,"price":115.5,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52324331487512,"sku":null,"price":154.0,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52324331520280,"sku":null,"price":192.5,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52324331585816,"sku":null,"price":231.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/45-degree-corner-post-retaining-wall.1.jpg?v=1784781963"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/collections\/corner-joiner-posts.png?v=1782130233","url":"https:\/\/www.retainingwallsdirect.com.au\/collections\/corner-joiner-posts\/90-degree.oembed","provider":"Retaining Walls Direct","version":"1.0","type":"link"}