{"product_id":"h-section-steel-middle-post","title":"H Section Steel Middle Post","description":"\u003ch2\u003eH Section Steel Middle Post\u003c\/h2\u003e\n\n\u003cp\u003eThe H Section Steel Middle Post is designed for the straight middle sections of concrete sleeper retaining walls. Also known as an H-beam or Universal Column retaining wall post, this steel post allows concrete sleepers to slot into both sides of the post, creating a strong continuous wall run between end posts, corner posts, and corner connections.\u003c\/p\u003e\n\n\u003cp\u003eManufactured from hot rolled steel and finished with hot dipped galvanising, this H Section Steel Middle Post provides long-term protection against outdoor exposure, soil moisture, corrosion, termites, insects, and fire. It is suitable for 75mm thick concrete sleepers and is commonly used where a stronger post specification is required than a standard C-channel post.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e H Section Steel Middle Post\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel section:\u003c\/strong\u003e 100 UC, also known as 100mm Universal Column\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Middle post for straight concrete sleeper retaining wall runs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for 75mm thick concrete sleepers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Hot rolled steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Hot dipped galvanised\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable lengths:\u003c\/strong\u003e 900mm, 1200mm, 1600mm, 1800mm, 2000mm, 2400mm, 2700mm, 3000mm, 3600mm, and 4200mm\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\u003eCompliance:\u003c\/strong\u003e Manufactured to Australian standards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom options:\u003c\/strong\u003e Custom gauges, custom lengths, step-downs, and welded steel fence brackets available by request\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n\n\u003cp\u003eThe H Section Steel Middle Post is available in multiple lengths so the correct post can be selected to suit the finished retaining wall height, required footing depth, soil type, sleeper length, and engineering requirements. Post length should always allow for both the visible wall height and the required in-ground embedment depth.\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\u003e900mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow garden walls, edging walls, and short retaining wall sections where limited retained height is required.\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 walls where additional in-ground embedment 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 residential retaining wall heights where stronger H-section support is preferred over C-channel.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e1800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eMedium retaining walls, boundary walls, and walls requiring deeper footing support.\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 retaining wall projects where wall height, soil pressure, or site conditions require a stronger middle post.\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;\"\u003eTaller wall sections or projects requiring additional embedment depth and stronger post stiffness.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e2700mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eHigher retaining walls, sloping blocks, reactive soil sites, and engineer-specified layouts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e3000mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eHeavy-duty residential retaining walls requiring greater in-ground depth and 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;\"\u003eTall retaining walls, stepped retaining walls, and more demanding structural applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e4200mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eMaximum listed length for taller walls, deep embedment, and engineer-specified retaining wall systems.\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\u003eAn H Section Steel Middle Post provides support on both sides of the post. This makes it the correct post type for the straight internal sections of a concrete sleeper retaining wall, where sleepers continue from one bay into the next. The H-shaped profile holds the end of one sleeper bay on one side and the start of the next sleeper bay on the other side, keeping the wall aligned and helping transfer lateral soil pressure into the concrete footing.\u003c\/p\u003e\n\n\u003cp\u003eThe 100 UC steel section provides greater stiffness than a standard C-channel profile. This makes H-section posts suitable for retaining wall sections where wall height, clay soil, surcharge loads, post spacing, or engineering requirements call for stronger lateral resistance.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Use an H Section Middle Post\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight wall runs:\u003c\/strong\u003e Use H Section Middle Posts between sleeper bays where the wall continues in a straight line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher retaining walls:\u003c\/strong\u003e H-section posts are commonly preferred where wall height exceeds the practical range of standard C-channel posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReactive clay sites:\u003c\/strong\u003e Heavy or reactive clay can create higher lateral pressure, making H-section support a stronger specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurcharge loads:\u003c\/strong\u003e Use H-section posts where the wall is near driveways, parked vehicles, structures, fences, stored materials, or sloping ground above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineer-specified projects:\u003c\/strong\u003e If a structural engineer specifies UC or H-beam posts, use the nominated post size and length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoundary walls:\u003c\/strong\u003e H-section posts are often used where wall movement could affect neighbouring property, fencing, paving, or structures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePost Length Selection\u003c\/h3\u003e\n\n\u003cp\u003ePost length should not be selected based only on the visible wall height. The full post length must allow for the finished retained height above ground plus the required in-ground embedment depth. Embedment depth depends on soil conditions, retained height, footing diameter, footing depth, post spacing, surcharge load, and engineering requirements.\u003c\/p\u003e\n\n\u003cp\u003eAs a general installation principle, taller retaining walls require longer posts because more steel must be embedded into the concrete footing to resist overturning and lateral earth pressure. For walls over 1.0m, walls in clay soils, or walls with surcharge loads above, post size, post spacing, and footing depth should be confirmed by a qualified structural engineer.\u003c\/p\u003e\n\n\u003ch3\u003eH Section vs C Section Posts\u003c\/h3\u003e\n\n\u003cp\u003eA C Section Steel End Post is typically used at the start or end of a retaining wall run, while an H Section Steel Middle Post is used between wall bays. The C-shaped profile holds sleepers on one side only, making it suitable for wall ends and some lower wall applications. The H-shaped profile holds sleepers on both sides and provides stronger support for the continuous middle sections of the wall.\u003c\/p\u003e\n\n\u003cp\u003eFor low walls in stable, well-drained ground, C-channel posts may be suitable. For taller walls, clay soils, surcharge loads, or engineer-specified designs, H-section posts are generally the stronger and more appropriate choice.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eCorrect installation is critical for retaining wall performance. H Section Steel Middle Posts must be set plumb, aligned accurately, spaced to suit the concrete sleeper length, and embedded into correctly sized concrete footings. Poor alignment can make sleeper installation difficult and may create visible gaps or uneven wall lines.\u003c\/p\u003e\n\n\u003cp\u003eThe concrete footing must be designed to resist overturning and lateral pressure from the retained soil. The hole diameter, depth, concrete strength, and embedment depth should suit the wall height and ground conditions. Where engineering drawings are supplied, always follow the specified post spacing, footing size, and concrete requirements.\u003c\/p\u003e\n\n\u003cp\u003eDrainage should be installed behind the wall to reduce hydrostatic pressure. A typical drainage system includes free-draining aggregate, geotextile fabric, and slotted agricultural pipe at the base of the wall discharging to a legal outlet. Drainage is especially important in clay soils because retained water can significantly increase load on the wall.\u003c\/p\u003e\n\n\u003ch3\u003eBenefits of Hot Dipped Galvanised Steel\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion resistance:\u003c\/strong\u003e Hot dipped galvanising provides long-lasting protection against soil moisture and outdoor exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather resistance:\u003c\/strong\u003e Suitable for exposed Australian retaining wall conditions, including rain, heat, and changing ground moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFire resistance:\u003c\/strong\u003e Steel posts provide better fire resistance than timber retaining wall posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermite resistance:\u003c\/strong\u003e Steel is not affected by termites, borers, or insect attack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePaintable finish:\u003c\/strong\u003e Posts can be painted to suit the surrounding colour scheme if required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong service life:\u003c\/strong\u003e Galvanised steel provides a durable structural support system for reinforced concrete sleeper walls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCustom Options\u003c\/h3\u003e\n\n\u003cp\u003eCustom gauges, custom lengths, step-downs, and welded steel fence brackets are available by request. These options may be required for stepped retaining walls, fence-over-wall applications, unusual site levels, non-standard wall heights, or engineer-specified projects.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Products\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary H-beam post option:\u003c\/strong\u003e \u003ca href=\"\/products\/h-beam-steel-post-for-concrete-sleepers\"\u003eH-Beam Steel Post for Concrete Sleepers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-channel 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\u003eSpecialty 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\u003cli\u003e\n\u003cstrong\u003eHardware and fixings:\u003c\/strong\u003e \u003ca href=\"\/products\/retaining-wall-hardware-pack-brackets-cleats-fixings\"\u003eRetaining Wall Hardware Pack\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 selection guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/h-beam-vs-c-channel-steel-posts-which-do-you-need\"\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\u003eRetaining wall installation 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: Why It Matters and How to Do It Right\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\u003c\/ul\u003e\n\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\n\u003cp\u003eH Section Steel Middle Posts are available in 900mm, 1200mm, 1600mm, 1800mm, 2000mm, 2400mm, 2700mm, 3000mm, 3600mm, and 4200mm 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":"900mm","offer_id":52279470850328,"sku":null,"price":43.47,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52279470883096,"sku":null,"price":57.96,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52279470915864,"sku":null,"price":77.28,"currency_code":"AUD","in_stock":true},{"title":"1800mm","offer_id":52279470948632,"sku":null,"price":86.94,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52279470981400,"sku":null,"price":96.6,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52279471014168,"sku":null,"price":115.92,"currency_code":"AUD","in_stock":true},{"title":"2700mm","offer_id":52279471046936,"sku":null,"price":130.41,"currency_code":"AUD","in_stock":true},{"title":"3000mm","offer_id":52279471079704,"sku":null,"price":144.9,"currency_code":"AUD","in_stock":true},{"title":"3600mm","offer_id":52279471112472,"sku":null,"price":173.88,"currency_code":"AUD","in_stock":true},{"title":"4200mm","offer_id":52279471145240,"sku":null,"price":202.86,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/Galvanised-Wall-H-Post-Installed.png?v=1781501471","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/h-section-steel-middle-post","provider":"Retaining Walls Direct","version":"1.0","type":"link"}