The courtyard of the building is small and there was not enough storage space for pile elements. Pile elements were delivered from SSAB’s mill to NordPile yard, from where the contractor delivered the elements to site in suitable batches according to proceeding of the work.
The locations of the old timber piles were known in rough accuracy according to old designs. Before installation of new piles, the locations were ensured in matter of avoiding contacts with them. Despite of the measures done, the old timber piles caused quite a lot harm for drilling in about half of the area of the building. Totally 41 new piles had contact with old timber piles during drilling. Contact with old timber pile does not prevent drilling of new pile, but it significantly slows down the penetration of the pile. Most often the contacts were small and lasted only short time, but with few piles the contact was more sever and it took long to drill through the old pile. Despite the amount of contacts with old timber piles, only one pile had to be abandoned and replaced with a new pile.
Quality of the bedrock was mainly good. Piles were drilled at least 1 meter into the bedrock. Most of the piles were dry, but some of the piles had artesian water. There was no exact limited area where artesian water was noticed, sometimes totally dry piles were next to piles having quite heavy water flow.