In a one-way slab the need for reinforcement appears mainly in the span and along the bending direction. The necessary bars derive from the calculated required reinforcement. In this specific case the bars provided are Ø10/100. Apart from the primary reinforcement that is placed parallel to the deformation direction, there is also need for reinforcement in the other, the secondary direction. In that direction, the placed rebars are Ø8/240 which means that bars with a Ø8 diameter have been placed every 240 mm.