The aim of this study is to better understand the Swedish concept of “förebyggande socialt arbete”, preventive social work. I have conducted eleven qualitative interviews with different key persons and skaters, together with participant observation. During the process of analyzing the material I have used Randall Collins´ concepts of interaction ritual chains together with Jean Laves and Etienne Wengers concept of situated learning. The answers could be split up in three areas, first those who regard prevention work as building good things for the future. The second group to prevent something bad to happen and the third group regard preventive social work to be repairing what was broken. The first group, mostly architects, included all three levels of the urban system, the social culture context, the human interaction and the urban design. The second and third group, mostly participant from the social work area, focused on the individual level. Although social work should be involved in social policy and development are included in the Swedish Social Serves Act. The findings is that Swedish definition of social work need to be wider in order to include the urban design as a part of social prevention work.