{"product_id":"galvanised-steel-h-posts-150mm-uc23","title":"Galvanised Steel H Posts 150mm UC23","description":"\u003ch2\u003eGalvanised Steel H Posts 150mm UC23.4\u003c\/h2\u003e\n\n\u003cp\u003eThe Galvanised Steel H Post 150mm UC23.4 is a heavy-duty Universal Column post designed for concrete sleeper retaining wall systems where additional strength, stiffness, and embedment depth are required. Also known as a 150UC H-beam post, this steel section is commonly used for taller retaining walls, reactive clay sites, surcharge load applications, and engineer-specified wall designs.\u003c\/p\u003e\n\n\u003cp\u003eThe H-shaped profile allows concrete sleepers to slot into both sides of the post, making it the correct post type for the middle sections of straight retaining wall runs. Compared with lighter post sections, the 150UC profile provides greater resistance to lateral earth pressure, helping support walls where soil load, wall height, driveway proximity, fencing, or sloping ground increases the demand on the structure.\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 H post for concrete sleeper retaining walls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel section:\u003c\/strong\u003e 150UC 23.4, also known as 150mm Universal Column\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e H-beam section for middle retaining wall posts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Hot-dip 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 Heavy-duty middle posts for straight retaining wall runs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable lengths:\u003c\/strong\u003e 2400mm, 2800mm, 3200mm, 3600mm, 4000mm, 4400mm, 4800mm, 5200mm, and 5600mm\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, footing design, post spacing, drainage, and engineering specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n\n\u003cp\u003e150UC 23.4 galvanised H posts are available in longer structural lengths to suit retaining walls requiring deeper embedment, greater retained height, and stronger lateral support. The correct post length must allow for both the visible wall height above ground and the required in-ground 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\u003e2400mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eMedium-height retaining walls where a heavier H post is required and adequate footing embedment must be allowed.\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;\"\u003eResidential retaining walls with increased retained height, clay soil, or moderate surcharge conditions.\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;\"\u003eTaller wall sections, stepped sites, and walls requiring deeper footing depth for improved lateral resistance.\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;\"\u003eHeavy-duty residential retaining walls, boundary walls, and sites with more demanding soil pressure.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e4000mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eHigher retaining wall designs requiring longer embedment and greater post stiffness.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e4400mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eEngineer-specified wall systems where increased retained height or ground conditions require longer steel posts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e4800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eDemanding retaining wall applications, including reactive clay sites, sloped blocks, and walls near surcharge loads.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e5200mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLong-post applications where deep embedment and stronger structural allowance are required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e5600mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eMaximum listed length for heavy-duty retaining wall systems, deep footings, and engineer-specified installations.\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 150UC 23.4 H post is a heavier Universal Column section used when a retaining wall requires more stiffness than a lighter 100UC post. The H-shaped profile supports concrete sleepers on both sides of the post, making it suitable for middle posts along continuous straight wall runs. Each sleeper bay transfers lateral soil pressure into the post, and the post transfers that force into the concrete footing.\u003c\/p\u003e\n\n\u003cp\u003eThis makes the 150UC post suitable for more demanding retaining wall layouts, including taller walls, reactive clay sites, driveway-adjacent walls, fence-over-wall applications, and walls where post spacing or retained soil load requires additional strength. Final suitability should always be confirmed against wall height, soil type, surcharge load, post centres, footing size, drainage design, and engineering requirements.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Use 150UC H Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTaller retaining walls:\u003c\/strong\u003e Use 150UC posts where wall height or retained soil pressure exceeds the practical limits of lighter post sections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReactive clay sites:\u003c\/strong\u003e Heavy or reactive clay can place higher lateral pressure on retaining walls, making a stronger H post more appropriate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurcharge load areas:\u003c\/strong\u003e Use heavier posts where the wall is near driveways, parking areas, fences, structures, stored materials, or sloping ground above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle wall bays:\u003c\/strong\u003e H posts are used between sleeper bays where the wall continues in a straight line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStepped wall layouts:\u003c\/strong\u003e Longer 150UC posts can suit walls with changing ground levels and deeper footing requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineer-specified projects:\u003c\/strong\u003e Use 150UC posts where the structural design nominates a 150mm Universal Column section.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e150UC vs 100UC H Posts\u003c\/h3\u003e\n\n\u003cp\u003eThe 100UC post is generally used where an H-beam is required but the wall does not need the added stiffness of a heavier section. The 150UC post is the next step up, offering a stronger and more rigid option for walls with higher retained loads, clay soil, surcharge conditions, or greater wall height.\u003c\/p\u003e\n\n\u003cp\u003eIf the retaining wall is low and conditions are stable, a 100UC post may be sufficient when confirmed by the design. If the wall is taller, near a driveway, supporting a fence, or built in reactive soil, a 150UC post is commonly the more appropriate structural choice.\u003c\/p\u003e\n\n\u003ch3\u003e150UC vs 200UC H Posts\u003c\/h3\u003e\n\n\u003cp\u003eThe 150UC post is a heavy-duty residential retaining wall post suitable for many stronger wall applications. The 200UC post is the premium-strength option generally reserved for the most demanding retaining wall designs, including very tall walls, high surcharge loads, heavy vehicle areas, structures above the wall, and engineer-specified projects requiring maximum section capacity.\u003c\/p\u003e\n\n\u003cp\u003eFor most heavy residential wall applications, 150UC may be the correct balance of strength, cost, and practicality. For high-load or high-risk conditions, engineering may require a 200UC post instead.\u003c\/p\u003e\n\n\u003ch3\u003eH Posts vs C-Channel Posts\u003c\/h3\u003e\n\n\u003cp\u003eH posts and C-channel posts are used in different parts of a concrete sleeper retaining wall system. A C-channel post holds sleepers on one side only and is often used at wall ends or for lower retaining walls. An H post holds sleepers on both sides, making it the correct section for middle posts in a straight run.\u003c\/p\u003e\n\n\u003cp\u003eThe H-shaped profile also provides greater stiffness than a C-channel post, which is why H posts are commonly used for taller walls, clay soils, surcharge loads, and engineer-specified wall systems.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eCorrect installation is critical for retaining wall performance. 150UC H posts should be set plumb, aligned accurately, spaced to suit the selected concrete sleeper length, and embedded into concrete footings designed for the retained height and ground conditions.\u003c\/p\u003e\n\n\u003cp\u003eThe footing must be sized to resist overturning and lateral pressure from retained soil. As wall height increases, the required post length, footing depth, footing diameter, and concrete volume also increase. Where engineering drawings are supplied, always follow the specified post spacing, post size, 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 usually 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 wall and may lead to movement, leaning, cracking, or structural failure.\u003c\/p\u003e\n\n\u003ch3\u003eBenefits of Galvanised Steel H Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty H-beam profile:\u003c\/strong\u003e Provides strong support for continuous concrete sleeper retaining wall runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-dip galvanised protection:\u003c\/strong\u003e Helps protect the steel from corrosion, soil moisture, and outdoor exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreater stiffness than lighter posts:\u003c\/strong\u003e Suitable for retaining walls with increased wall height, clay soil, surcharge, or engineering requirements.\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 long lengths:\u003c\/strong\u003e Available in longer post sizes for deeper footing embedment and heavy-duty retaining wall designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong service life:\u003c\/strong\u003e Designed for permanent outdoor retaining wall construction.\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-beam option:\u003c\/strong\u003e \u003ca href=\"\/products\/100uc-h-beam-post\"\u003e100 UC 14.8 Galvanised Steel H-Beam Retaining Wall Post\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium H-beam option:\u003c\/strong\u003e \u003ca href=\"\/products\/200uc-h-beam-post\"\u003e200 UC 46 Galvanised Steel H-Beam Retaining Wall Post\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull H-beam range:\u003c\/strong\u003e \u003ca href=\"\/products\/h-beam-steel-post-for-concrete-sleepers\"\u003eH-Beam Steel Post for Concrete Sleeper Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-channel end post option:\u003c\/strong\u003e \u003ca href=\"\/products\/c-channel-pfc-steel-post-for-concrete-sleepers\"\u003eC-Channel PFC Steel Post for Concrete Sleepers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e150 series corner post:\u003c\/strong\u003e \u003ca href=\"\/products\/90deg-corner-joiner-150\"\u003e90 Degree Corner Galvanised Steel Joiner Post — 150 Series\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAngled 150 series corner post:\u003c\/strong\u003e \u003ca href=\"\/products\/45deg-corner-joiner-150\"\u003e45 Degree Corner Galvanised Steel Joiner Post — 150 Series\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\u003eSteel post installation guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/how-to-install-steel-posts-for-a-concrete-sleeper-retaining-wall\"\u003eHow to Install Steel Posts for 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\u003eGeotextile guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/geotextile-fabric-retaining-walls-guide\"\u003eGeotextile Fabric for Retaining Walls: What It Does and How to Use It\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 H Posts 150mm UC23.4 are available in 2400mm, 2800mm, 3200mm, 3600mm, 4000mm, 4400mm, 4800mm, 5200mm, and 5600mm 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 Wall Store","offers":[{"title":"2400mm","offer_id":52287658950936,"sku":null,"price":267.26,"currency_code":"AUD","in_stock":true},{"title":"2800mm","offer_id":52287658983704,"sku":null,"price":311.81,"currency_code":"AUD","in_stock":true},{"title":"3200mm","offer_id":52287659016472,"sku":null,"price":356.34,"currency_code":"AUD","in_stock":true},{"title":"3600mm","offer_id":52287659049240,"sku":null,"price":400.89,"currency_code":"AUD","in_stock":true},{"title":"4000mm","offer_id":52287659082008,"sku":null,"price":445.44,"currency_code":"AUD","in_stock":true},{"title":"4400mm","offer_id":52287659114776,"sku":null,"price":489.98,"currency_code":"AUD","in_stock":true},{"title":"4800mm","offer_id":52287659147544,"sku":null,"price":534.53,"currency_code":"AUD","in_stock":true},{"title":"5200mm","offer_id":52287659180312,"sku":null,"price":579.06,"currency_code":"AUD","in_stock":true},{"title":"5600mm","offer_id":52287659213080,"sku":null,"price":623.61,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/150UC.jpg?v=1781571264","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/galvanised-steel-h-posts-150mm-uc23","provider":"Retaining Walls Direct","version":"1.0","type":"link"}