Since the end of the Second World War, housing exclusion is ruled by a central standard time: The turnover of the poor inside the social services. The duration of stay in relief accommodations is indeed very often restricted. As many provisional social services last indefinitely, emergency shelters impose a duration that is temporary and repeated. The duration of stay in these shelters is indeed very short (mainly between one and seven nights), despite the changes planned by the DALO law (2007). This temporality of relief accommodation results in a high mobility for the most precarious individuals in the social structure. In this article, the concept of social splitting is proposed to name the organization of such a turnover and its effects on the daily temporality of the homeless. This model power is different from the total institution one. But, in order not to fall into a deterministic view, it is necessary to pay attention to the diversity of reactions to both social workers and homeless people, so that practices that border on social splitting in everyday life may be noticed and described.