Concrete piles and concrete blocks. Kurt Hedins …keri AB, a haulier in S¶dertlje, just south of Stockholm, has a niche handling long and heavy concrete items. The concrete blocks in question are primarily used in road construction work where they are laid out mile after mile, alongside work in progress, to keep traffic on the right side of workplaces. The piles are used in groundwork in the construction industry. For more than 40 years Hiab cranes have taken care of the heavy handling required by Kurt Hedin's customers.