People have used pile foundations throughout history to support structures by transferring loads to deeper and stronger soil layers. One of the most important questions during the design of the pile foundation is the bearing capacity of the pile. The most reliable method for determining the bearing capacity is to use results from pile load tests. Traditionally, the static pile load tests have been used and more recent the dynamic tests. The rapid load test, at intermediate loading rates, was invented to overcome the disadvantages of the static tests (expensive and time-consuming) and the dynamic tests (the stress wave effects) and is conducted more and more in practice.@en