Wooden piles are commonly used in the construction of temporary piles, pile bridges and also some ground reinforcements. This can be, for example, temporary working roads when building a railway or when a temporary stabilization measure is needed in swampy areas, and the reason for this is that wooden piles have a very short service life. It is usually a spruce between 15-20 meters long, which is turned upside down and beaten into the clay.
However, the service life of wooden piles can be very long if they are knocked down long enough and then extended with, for example, a concrete pile, this is because the oxygen does not reach the wood and thus the wood does not rot. In the context of cohesion piles, the wooden pile is often used in combination with the concrete pile and the load is then verified as most commonly by shock wave measurement, or dynamic test load as it is also called.