The Plate Testing Co. is a specialist provider of plate testing services, delivering accurate, reliable ground investigation data across the UK for over 25 years. With extensive experience across highways, commercial developments, residential schemes, and major infrastructure projects, we support engineers, contractors, and consultants with testing they can trust.

Our process is seamless. From the moment you decide a test is required and submit your request, our team acts quickly to mobilise and deploy a qualified technical engineer to your site. Testing is carried out efficiently and in full compliance with relevant standards. Once complete, results are transmitted directly to our office, where our dedicated reporting team promptly formalises the data. Reports are typically issued within a few hours, allowing you to review your results without delay and continue your work with confidence.

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Get your project off to a flying start with our precision plate testing services. At Plate Load Test Co., we deliver top-notch plate testing, plate bearing tests, and CBR testing nationwide, giving you fast, accurate, and reliable data to guide your civil engineering and construction projects. We specialise in finding out the real strength and bearing capacity of ground, subgrade, and backfills using modern, UKAS-calibrated kits and some of the best engineers in the business.

When you run a plate load test, you apply a steadily increasing load to a circular steel plate that’s getting heavier and heavier, and you measure how the ground responds in terms of how much it’s sinking. This way, your test results reflect the actual ground conditions, the ground particle sizes, and how the site behaves in real life, rather than relying on lab tests that might not be a true picture of the site conditions.

What Is a Plate Load Test?

Plate load test services involve placing a steel plate, often referred to as a test plate or loading plate, directly onto the ground surface or within a shallow pit at the defined test location. A controlled load test is then carried out by applying a given load in defined load increments using a hydraulic jack.

As the load applied increases, settlement is measured using dial gauges, allowing engineers to assess bearing pressure, strain modulus, and overall subgrade reaction. The test continues until the plate begins to settle rapidly, indicating that shear failure occurs or that excessive settlement has been induced. These reliable results are then used to assess bearing capacity, actual strength, and suitability for platform construction and working platforms.

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Why Choose The Plate Testing Co.?

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Same-Day, Accurate & Reliable Data

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Get a full report, complete with load increments, settlement graphs, bearing capacity, and settlement analysis, on the same day we do the test.

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Nationwide Coverage & On-Site Flexibility

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Urban, rural, or wind farm, wherever you are in the UK, we can get to you. We’re flexible, so we can work around your site conditions to get the best results.

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UKAS-Calibrated Equipment & Experienced Team

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Every piece of kit we use is properly certified. Our engineers are pros at getting accurate results every time, and they’ll give you valuable insights and peace of mind.

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Plate Diameter, Plate Size, and Test Accuracy

The plate diameter has a direct impact on how deep down the test goes and what bearing capacity figures you get. Most plate load tests use plates that are either 0.3 m or 0.6 m in diameter, and the size of the pressure bubble is in proportion to the size of the plate.

Small plates are good at getting settlement analysis sorted out fast, while bigger plates give you a more realistic idea of what’s going on beneath platforms, temporary structures, and crane pads, especially when you’re dealing with heavy gear like a tracked piling rig.

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Shaping The Future Of Construction

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Why Plate Load Testing Is Essential for Project Success

Plate load testing gives engineers direct insight into how the ground behaves under real loading conditions. The ultimate bearing capacity of the ground is determined by dividing the total load value, or total load required to induce settlement, by the area of the plate, representing the maximum vertical pressure the ground can sustain.

To determine the safe bearing capacity, the ultimate bearing capacity is reduced using an appropriate factor of safety, ensuring the ground can safely support platform construction, foundations, and construction equipment without failure. Where required, plate load test data can be compared with results from a California Bearing Ratio, or CBR test, providing additional context for soil types and subgrade performance.

By confirming design parameters, validating design assumptions, and understanding the reaction load required to support structures and plants, plate load testing plays a crucial role in delivering safe, economical, and durable construction outcomes.