{"product_id":"concrete-for-retaining-wall-post-footings","title":"Concrete for Retaining Wall Post Footings","description":"\u003ch2\u003eConcrete for Retaining Wall Post Footings\u003c\/h2\u003e\n\u003cp\u003eEvery steel retaining wall post needs to be set in concrete footings — and getting the concrete specification right is as important as getting the post size right. Undersized or poorly mixed footings are one of the leading causes of post movement and wall lean over time.\u003c\/p\u003e\n\u003cp\u003eWe supply 20MPa concrete mix for retaining wall post footings in two formats — \u003cstrong\u003ebags\u003c\/strong\u003e for small projects and top-up quantities, and \u003cstrong\u003eby the cubic metre\u003c\/strong\u003e for larger jobs where ordering in bulk is more economical.\u003c\/p\u003e\n\u003ch3\u003eHow Much Concrete Do You Need?\u003c\/h3\u003e\n\u003cp\u003eEach post footing typically requires 0.05–0.12m³ of concrete depending on post size and wall height. Use our \u003ca href=\"\/pages\/wallwise-pro\"\u003eWallWise Pro calculator\u003c\/a\u003e to get an accurate concrete volume for your wall. As a rough guide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 Series post\u003c\/strong\u003e — approx. 0.05m³ per footing (300mm diameter × 600mm deep)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e150 Series post\u003c\/strong\u003e — approx. 0.08m³ per footing (350mm diameter × 750mm deep)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e200 Series post\u003c\/strong\u003e — approx. 0.12m³ per footing (400mm diameter × 900mm deep)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMinimum 20MPa compressive strength for all post footings\u003c\/li\u003e\n\u003cli\u003eAllow 24–48 hours minimum cure before backfilling and loading the wall\u003c\/li\u003e\n\u003cli\u003eFor walls over 1.0m or on reactive clay: consult a structural engineer for footing design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePair with \u003ca href=\"\/collections\/steel-posts\"\u003egalvanised steel posts\u003c\/a\u003e and our \u003ca href=\"\/collections\/retaining-wall-kits-bundles\"\u003eretaining wall kits\u003c\/a\u003e.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"20kg Bag","offer_id":52321685504280,"sku":"CONC-20KG","price":10.0,"currency_code":"AUD","in_stock":true},{"title":"1m³ (Cubic Metre)","offer_id":52321685537048,"sku":"CONC-1M3","price":280.0,"currency_code":"AUD","in_stock":true}],"url":"https:\/\/www.retainingwallsdirect.com.au\/products\/concrete-for-retaining-wall-post-footings","provider":"Retaining Walls Direct","version":"1.0","type":"link"}