{"title":"150mm Width Concrete Sleepers","description":null,"products":[{"product_id":"galvanised-steel-h-posts-150mm-uc23","title":"Galvanised Steel H Posts 150mm UC23","description":"\u003cp\u003e\u003cstrong\u003eThe 150UC 23.4 galvanised H post is the heavy-duty middle post for taller and higher-load retaining walls — a deeper, stronger section than the 100 series.\u003c\/strong\u003e Hot-dip galvanised to AS\/NZS 4680, in lengths from 2400 to 5600mm. 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\u003e150UC 23 galvanised H post (150 series)\u003c\/h2\u003e\n\u003cp\u003eStep up to the 150 series for taller walls, reactive clay, surcharge loads or wider post spacing. The H-beam accepts \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleepers\u003c\/a\u003e on both sides; pair with 150-series C and corner posts from the \u003ca href=\"\/collections\/steel-posts\"\u003esteel post range\u003c\/a\u003e.\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. Taller walls need proportionally more embedment — always have post size, spacing and footing designed by an engineer for walls in this range (\u003ca href=\"\/pages\/engineered-retaining-walls-over-1m\"\u003eengineered walls over 1 metre\u003c\/a\u003e, \u003ca href=\"\/pages\/steel-post-sizing-guide\"\u003epost 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\u003e150UC 23.4 (Universal Column), H-beam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRole\u003c\/th\u003e\n\u003ctd\u003eHeavy-duty middle post — sleepers both sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLengths\u003c\/th\u003e\n\u003ctd\u003e2400 – 5600mm\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 Earth-retaining structures\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\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 150 series instead of 100?\u003c\/strong\u003e\u003cbr\u003eFor taller walls, reactive clay, surcharge loads or wider post spacing — confirm by engineering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat lengths are available?\u003c\/strong\u003e\u003cbr\u003e2400 to 5600mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it rust?\u003c\/strong\u003e\u003cbr\u003eNo — hot-dip galvanised to AS\/NZS 4680.\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":"2400mm","offer_id":52287658950936,"sku":"H15024","price":316.2,"currency_code":"AUD","in_stock":true},{"title":"2800mm","offer_id":52287658983704,"sku":"H15028","price":368.9,"currency_code":"AUD","in_stock":true},{"title":"3200mm","offer_id":52287659016472,"sku":"H15032","price":421.6,"currency_code":"AUD","in_stock":true},{"title":"3600mm","offer_id":52287659049240,"sku":"H15036","price":474.6,"currency_code":"AUD","in_stock":true},{"title":"4000mm","offer_id":52287659082008,"sku":"H15040","price":527.3,"currency_code":"AUD","in_stock":true},{"title":"4400mm","offer_id":52287659114776,"sku":"H15044","price":580.0,"currency_code":"AUD","in_stock":true},{"title":"4800mm","offer_id":52287659147544,"sku":"H15048","price":632.4,"currency_code":"AUD","in_stock":true},{"title":"5200mm","offer_id":52287659180312,"sku":"H15052","price":684.95,"currency_code":"AUD","in_stock":true},{"title":"5600mm","offer_id":52287659213080,"sku":"H15056","price":737.65,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/galvanised-steel-h-post-150uc23.jpg?v=1782364674"},{"product_id":"galvanised-steel-c-posts-150mm-150pfc","title":"Galvanised Steel C Posts – 150mm 150PFC","description":"\u003cp\u003e\u003cstrong\u003eThe 150PFC galvanised C post is the heavy-duty end\/start post for taller retaining walls — a deeper C-channel section that accepts sleepers from one side for a clean termination.\u003c\/strong\u003e Hot-dip galvanised to AS\/NZS 4680, in lengths from 2000 to 5800mm. 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\u003e150PFC galvanised C post (150 series)\u003c\/h2\u003e\n\u003cp\u003eUse the 150-series C post to terminate taller walls cleanly at ends and starts, with \u003ca href=\"\/collections\/steel-posts\"\u003e150-series H and corner posts\u003c\/a\u003e along the run. Pairs with the full \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleeper\u003c\/a\u003e range.\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. For walls in this range, have post size, spacing and footing designed by an engineer (\u003ca href=\"\/pages\/engineered-retaining-walls-over-1m\"\u003eengineered walls over 1 metre\u003c\/a\u003e, \u003ca href=\"\/pages\/steel-post-sizing-guide\"\u003epost 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\u003e150PFC (Parallel Flange Channel), C-channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRole\u003c\/th\u003e\n\u003ctd\u003eHeavy-duty end \/ start post — sleepers one side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLengths\u003c\/th\u003e\n\u003ctd\u003e2000 – 5800mm\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 Earth-retaining structures\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\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\u003eWhat's the 150 C post for?\u003c\/strong\u003e\u003cbr\u003eA heavy-duty end\/start post for taller walls — accepts sleepers one side.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat lengths?\u003c\/strong\u003e\u003cbr\u003e2000 to 5800mm.\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":"2000m","offer_id":52287815778584,"sku":"C15020","price":200.9,"currency_code":"AUD","in_stock":true},{"title":"2400m","offer_id":52287815811352,"sku":"C15024","price":241.1,"currency_code":"AUD","in_stock":true},{"title":"2800m","offer_id":52287815844120,"sku":"C15028","price":281.3,"currency_code":"AUD","in_stock":true},{"title":"3200m","offer_id":52287815876888,"sku":"C15032","price":321.45,"currency_code":"AUD","in_stock":true},{"title":"3600m","offer_id":52287815909656,"sku":"C15036","price":361.65,"currency_code":"AUD","in_stock":true},{"title":"4000mm","offer_id":52287815942424,"sku":"C15040","price":401.85,"currency_code":"AUD","in_stock":true},{"title":"4400mm","offer_id":52287815975192,"sku":"C15044","price":442.0,"currency_code":"AUD","in_stock":true},{"title":"4800mm","offer_id":52287816007960,"sku":"C15048","price":482.2,"currency_code":"AUD","in_stock":true},{"title":"5200mm","offer_id":52287816040728,"sku":"C15052","price":522.4,"currency_code":"AUD","in_stock":true},{"title":"5600mm","offer_id":52287816073496,"sku":"C15056","price":562.55,"currency_code":"AUD","in_stock":true},{"title":"5800mm","offer_id":52287817220376,"sku":"C15058","price":582.65,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/galvanised-steel-c-post-150pfc.jpg?v=1782364674"}],"url":"https:\/\/www.retainingwallsdirect.com.au\/collections\/150mm-width-concrete-sleepers.oembed","provider":"Retaining Walls Direct","version":"1.0","type":"link"}