Horizontal load is the main controlling factor of high-rise prefabricated structure and floor system is a fundamental part that ensures the effective transmission of horizontal load in the structural system. However, the mechanical properties of traditional prefabricated systems including wooden floor and concrete floor are poor. Thus, neither of them is suitable for long-span prefabricated structures. In order to improve the mechanical properties of floor systems, a new truss composite floor composed of four factory-made floor units and assemb...