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Last updateThu, 14 Oct 2021 10am

An essential guide to king post walls – why they are an obvious and optimum choice

Those who have been involved in wall projects for many years would undoubtedly already have a good idea of the king post wall and what it can do for any piece of property. King post walls have been around for a long time, and they are, in fact, one of the oldest retaining wall systems particularly useful for deep and complex excavation projects. Another name for the king post wall is soldier piles, and if you have a particular wall project in mind and would like to make sure of your choice when it comes to your wall system, here’s your essential guide to king post walls – and why they are an obvious and optimum choice.

What it is

King post walls have been widely and successfully used for centuries, and it was in the 18th century when it was first utilised in cities like London, Berlin, and New York. But what exactly is it? The simple answer is that a king post wall is an isolated column made of steel, and it is usually installed and set in place along a retaining wall's proposed line, often at centres in between 1 metre and 3 metres. The space in between each king post wall is also filled right over the retaining height using various solutions. But the most common solution for the sealed space is precast panels made of concrete.

The design

Your king post wall design should adhere to either British or Eurocode standards, and you can set them up to be either permanent or temporary, depending on your requirements. The good news is that the average design lifespan of post king walls is up to 50 years, and it can even be more.

The installation

The installation of king post walls involves the drilling of holes using a mini or large diameter piling rig or a high-powered CFA. The construction specialists will then fill the gap with concrete and then install an H-beam. The beam lets you install or insert the precast concrete panels in between the H-sections' webs, and once you are finished with your excavation, the wall is also finished and embedded. You can use king post retaining walls for various applications, and you can also select different heights for your walls according to the terrain or ground condition.

Their major benefits

As you may already have realised, king post retaining walls are not difficult to construct and install, and they are a more cost-effective solution compared to wall systems made of concrete pile or sheet pile. The installation process is also versatile, allowing you to make certain adjustments whenever necessary right on the field, and installation is also vibration-free – which means there is no need to worry about the risk of site accidents or disruption.

The entire installation process of king post walls is quicker and less of a hassle than other wall systems, and you can benefit from a smoother transition. Many property owners make use of king post walls for flood defence, but you can also use them for other common purposes such as embankment retention and your basement. King post walls can last for decades, and they are indeed a very sturdy, durable, and stable element that can protect your property in many ways.

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