{"product_id":"h-post-uc-400mm-to-5600mm","title":"Galvanised Steel H Posts 100mm 100UC – UC 14.8","description":"\u003ch2\u003eGalvanised Steel H Posts 100mm 100UC – UC 14.8\u003c\/h2\u003e\n\n\u003cp\u003eThe Galvanised Steel H Post 100mm 100UC – UC 14.8 is a strong, hot-dip galvanised retaining wall post designed for concrete sleeper retaining wall systems. Also known as a 100UC H-beam or Universal Column post, this steel section is commonly used for straight wall runs where concrete sleepers need to slot into both sides of the post.\u003c\/p\u003e\n\n\u003cp\u003eThe H-shaped profile provides greater lateral stiffness than a standard C-channel post, making it a practical choice for retaining walls where extra strength is required, including walls in reactive soil, walls with higher retained loads, stepped walls, and applications where an engineer has specified a UC post. The galvanised finish helps protect the steel from corrosion, soil moisture, weather exposure, and long-term outdoor conditions.\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 100UC 14.8, also known as 100mm 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 Middle posts for straight retaining wall runs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable lengths:\u003c\/strong\u003e 400mm, 600mm, 800mm, 1200mm, 1600mm, 2000mm, 2400mm, 2800mm, 3200mm, and 3600mm\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 75mm sleepers and engineer-approved post spacing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Lengths\u003c\/h3\u003e\n\n\u003cp\u003e100UC 14.8 galvanised H posts are available in multiple lengths so the correct post can be matched to wall height, footing depth, soil conditions, post spacing, surcharge load, and engineering requirements. The total post length must allow for both the visible wall height above ground and the required 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\u003e400mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eVery low garden edging, small sleeper transitions, and custom low-height retaining wall details.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003e600mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow garden beds, shallow retaining sections, and small landscape walls 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\u003e800mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eLow retaining walls, edging walls, and short residential wall sections requiring a stronger steel post than timber alternatives.\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;\"\u003eSmall to medium residential retaining walls where additional embedment depth is required.\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 applications where a 100UC H-beam is preferred over a standard C-channel post.\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 concrete sleeper retaining wall projects requiring greater footing depth and improved lateral support.\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 residential wall sections, stepped blocks, and sites where deeper embedment is required.\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;\"\u003eHigher retaining wall sections where post depth, soil loading, and engineering requirements need careful allowance.\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;\"\u003eMore demanding retaining wall applications, deeper footing requirements, and engineered residential wall designs.\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;\"\u003eLongest listed 100UC option for deep embedment, taller wall layouts, 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\u003eA 100UC 14.8 H post is a Universal Column steel section used to support concrete sleeper retaining walls. The H-shaped profile allows sleepers to sit inside the post flange on both sides, making it ideal for middle posts in straight retaining wall runs. This gives each bay of sleepers a strong steel support point and helps transfer lateral earth pressure through the post and into the concrete footing.\u003c\/p\u003e\n\n\u003cp\u003eThe 100UC 14.8 section is commonly used as an entry-level H-beam specification where a C-channel post is not suitable, but a heavier 150UC or 200UC post is not required. It is often selected for low to medium residential walls, reactive clay conditions, tighter post spacing, and jobs where the retaining wall needs more strength than a basic end-post arrangement.\u003c\/p\u003e\n\n\u003cp\u003ePost selection should always consider retained height, soil type, surcharge load, drainage, sleeper thickness, post centres, and footing size. For walls over 1.0m, walls supporting fences, driveways, sloping ground, structures, or heavy clay soils, a structural engineer should confirm the correct post size, footing depth, and post spacing.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Use 100UC H Posts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight wall runs:\u003c\/strong\u003e Use 100UC H posts between sleeper bays where the wall continues in a straight line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle post locations:\u003c\/strong\u003e H posts support sleepers on both sides, making them the correct section for internal wall bays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow to medium retaining walls:\u003c\/strong\u003e Suitable where a stronger post than a C-channel is required but the wall does not need a heavier 150UC or 200UC section.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReactive soil sites:\u003c\/strong\u003e Useful where ground movement or clay soil increases retaining wall loading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCloser post spacing:\u003c\/strong\u003e Can be used in designs where closer post centres are required for additional wall control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineer-specified jobs:\u003c\/strong\u003e Use 100UC posts when the engineering design nominates a 100UC 14.8 section.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e100UC vs 150UC H Posts\u003c\/h3\u003e\n\n\u003cp\u003eThe 100UC 14.8 is the lighter H-beam option and is typically used for lower retaining walls or projects where H-beam strength is required without moving into a heavy-duty steel section. A 150UC post provides greater stiffness and section capacity, making it more suitable for taller walls, higher surcharge loads, heavier clay conditions, and more demanding engineered retaining wall designs.\u003c\/p\u003e\n\n\u003cp\u003eIf the wall is low, the soil is stable, and surcharge loads are minimal, 100UC may be suitable when confirmed by the wall design. If the wall is taller, supporting a fence, close to a driveway, or retaining heavy clay, a heavier post specification may be required.\u003c\/p\u003e\n\n\u003ch3\u003eH Posts vs C-Channel Posts\u003c\/h3\u003e\n\n\u003cp\u003eH posts and C-channel posts serve different roles in a concrete sleeper retaining wall. A C-channel post holds sleepers on one side only and is often used at wall ends, low walls, or simple retaining wall applications. An H post holds sleepers on both sides, making it the correct post for the middle sections of a continuous wall run.\u003c\/p\u003e\n\n\u003cp\u003eThe H profile also provides greater stiffness than a comparable C-channel post, which is why H posts are commonly used for taller walls, heavier soils, surcharge loads, and engineered retaining wall designs.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eCorrect installation is critical for retaining wall performance. 100UC H posts should be set plumb, aligned accurately, spaced to match the sleeper length, and embedded into concrete footings designed for the wall height and soil conditions. Poor alignment can make sleeper installation difficult and may create visible gaps, uneven wall lines, or unnecessary stress in the wall system.\u003c\/p\u003e\n\n\u003cp\u003eThe footing must be sized to resist overturning and lateral pressure from the retained soil. As a general rule, taller retaining walls require longer posts and deeper embedment. Footing diameter, footing depth, concrete strength, post spacing, and embedment depth should always follow the engineering design where one is supplied.\u003c\/p\u003e\n\n\u003cp\u003eDrainage must also be installed behind the wall. A correct 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 wall movement, leaning, cracking, or failure.\u003c\/p\u003e\n\n\u003ch3\u003eBenefits of Galvanised Steel H Posts\u003c\/h3\u003e\n\u003cul\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\u003eStrong H-beam profile:\u003c\/strong\u003e Provides support on both sides of the post for continuous concrete sleeper wall runs.\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 offers better fire resistance than timber retaining wall posts.\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\u003cli\u003e\n\u003cstrong\u003eMultiple lengths:\u003c\/strong\u003e Available in short and long options to suit low walls, stepped walls, and deeper footing requirements.\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\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\u003eHeavy-duty H-beam option:\u003c\/strong\u003e \u003ca href=\"\/products\/galvanised-steel-h-posts-150mm-150uc-uc-23\"\u003eGalvanised Steel H Posts 150mm 150UC – UC 23\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner and end 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\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\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\u003eGalvanised Steel H Posts 100mm 100UC – UC 14.8 are available in 400mm, 600mm, 800mm, 1200mm, 1600mm, 2000mm, 2400mm, 2800mm, 3200mm, and 3600mm 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":"400mm","offer_id":52287600951576,"sku":"H10004","price":26.17,"currency_code":"AUD","in_stock":true},{"title":"600mm","offer_id":52287600984344,"sku":"H10006","price":39.25,"currency_code":"AUD","in_stock":true},{"title":"800mm","offer_id":52287601017112,"sku":"H10008","price":52.33,"currency_code":"AUD","in_stock":true},{"title":"1200mm","offer_id":52287601049880,"sku":"H10012","price":78.5,"currency_code":"AUD","in_stock":true},{"title":"1600mm","offer_id":52287601082648,"sku":"H10016","price":104.67,"currency_code":"AUD","in_stock":true},{"title":"2000mm","offer_id":52287601115416,"sku":"H10020","price":130.85,"currency_code":"AUD","in_stock":true},{"title":"2400mm","offer_id":52287601148184,"sku":"H10024","price":157.01,"currency_code":"AUD","in_stock":true},{"title":"2800mm","offer_id":52287601180952,"sku":"H10028","price":183.18,"currency_code":"AUD","in_stock":true},{"title":"3200mm","offer_id":52287601213720,"sku":"H10032","price":209.35,"currency_code":"AUD","in_stock":true},{"title":"3600mm","offer_id":52287601246488,"sku":"H10036","price":235.53,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/images.jpg?v=1781570611","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/h-post-uc-400mm-to-5600mm","provider":"Retaining Walls Direct","version":"1.0","type":"link"}