The aim of this study was to examine how the interaction works when a workplace suffer an emergency, and the emergency responders temporary deploy their workplace inside the affected workplace to handle the emergency. The research is based on semi-structured interviews with personnel from fire and rescue services and personnel from schools and elderly care centres. The results are structured around three boundary work practices that governs the interaction: emergency containment, accountability and division of labour. These boundary work practices provides structure and enables both parties to concentrate on own work, and thereby can the interaction be described as a cooperation mutually accomplished by both parties.