Development of composite action in a new long-span timber composite floor: Full-scale experiment and analytical approach

•Five types of screw-based shear connection between different components of the composite floor were tested.•The effects of screw diameter, screw length, and screw installation angle on the stiffness of the shear connection were quantified.•The bending performance of the composite floor under various configurations was measured.•The measured overall stiffness of the composite section was compared with the prediction of Gamma-method.