This presentation provides a concise overview of the requirements of TRGS 800 regarding the storage of hazardous substances. The focus is on effective fire safety measures to prevent fires and explosions in storage areas and work areas. The presentation explains how hazardous substances must be properly classified, stored, and kept separate from one another. In addition, structural, technical, and organizational protective measures are presented in a practical manner. Using typical examples from everyday work, common mistakes and appropriate solutions are highlighted.