When a teams requests a non-intrusive structural investigation, it’s usually because they don’t know what’s going on inside their structure. That uncertainty is the problem they’re trying to solve. They need answers so they can plan works, manage risk, and keep projects moving. Non-intrusive methods are often the fastest, safest way to get there, but like any engineering approach, they rely on understanding both capability and limitation. Investigations should be scoped caref

OBJECTIVES TRACE was instructed to undertake a non-intrusive structural investigation of the upstream and downstream spillways of a concrete dam to determine the presence and location of voids beneath the slabs. SOLUTIONS TRACE carried out investigations of two spillway areas: Upstream spillway: approximately 271 m² Downstream spillway: approximately 336 m² All accessible areas of the spillways were scanned in a single direction using large-array GPR, providing continuous c

Structural investigations are often treated as stand alone events. A concern arises, an investigation is commissioned, a report is issued, and the asset is then left until the next issue emerges. For ageing assets, this approach can be limiting. Structures do not fail suddenly. They deteriorate gradually, unevenly, and often out of sight. A single investigation is invaluable for understanding a structure’s condition at a given point in time and for establishing a clear baseli

An assumption is often made is that more data, and therefore information, automatically means more understanding and to better decisions. However, this approach isn’t always helpful. Too often engineers are drowning in data but starved of answers. Vast volumes of outputs are delivered but with little clarity on what matters, leaving teams unsure how to move forward with confidence. The problem is not a lack of technology. It is a lack of how to get the most value out of it. D

Bridge maintenance is entering a critical period. In England alone, National Highways reports that its road network contains more than 20,000 structures that must remain safe, operational and resilient. Alongside this, by 2030, more than half of the country’s bridges will be over 50 years old, with many of these structures requiring interventions that can cost millions of pounds each time. This combination of scale and age presents a significant challenge for the industry. Ma

Across the UK, ageing concrete structures are entering a critical phase. Bridges, highways, public buildings, logistics hubs, schools and hospitals, many built between the 1920s and 1970s, are now showing predictable but consequential signs of wear. Decades of carbonation, chloride exposure, freeze–thaw cycles and general environmental stress have taken their toll. And, with RAAC concerns adding further complexity, the need to understand the true condition of these assets has

Structural investigations are evolving, but not because of new gadgets. Technologies like GPR, ultrasonic tomography and iCAMM™ are powerful, but the real shift is happening in how they’re used. High-quality structural investigation isn’t defined by tools, it’s defined by workflow: the methodology, the discipline, and the interpretation behind the data. That’s the difference between pages of raw data with no clarity, and a defensible explanation of how a structure is built, h

Waste and risk remain two of the most persistent challenges in construction and asset management. Projects are often delayed, budgets overspent, and materials discarded unnecessarily, not because of poor design or workmanship, but because of uncertainty. When teams don’t fully understand how a structure is built or performing, they can often end up making assumptions which cost time, money, and environmental resources. The solution isn’t more testing, it’s smarter testing. Sp