The minor construction measures that influence vibration in lightweight floors were presented. A lightweight steel framed floor equipped with a resilient ceiling was used as test object under laboratory conditions. The ceiling joist stiffness was analyzed by a finite element model where both thickness of material and position of the mounting screws were considered. Two different kinds of joists were tested on a floor section. The effect of a visco-elastic material in conjunction with the joists, to increase the damping, were also shown.