Dents, scratches and peeling off of veneer may occur on the floor. Please protect by laying desk mats and carpets.
Even using a floor with caster-related dent- and scratch-resistant performance, please protect floors as such for long-time use.
Also, please avoid to use ball (spherical)-shape casters, because the weight of chairs will concentrate on one point that will damage floor surface. Please note that scratches will create even when using a wheelchair.