The use of flat jack investigation methodology is related to a need to evaluate masonry structure quality and, therefore, determine its mechanical characteristics. The major difficulties encountered in the collection of representative samples undisturbed by masonry contributed to the development of innovative and even more reliable methodologies and tools. The jacks, constructed and verified at the DRC production centre, ensure reliability and quality. Produced in different shapes and sizes depending on their specific use, these jacks can also be produced to customer specifications if testing conditions so require. Sheet metal thicknesses, welding type, and connection characteristics can be agreed upon with the customer.