Abstract: Expansion joint cover assemblies are disclosed which are structured and dimensioned for use in covering expansion joints or spaces between adjacent structural sections of a building such as spaced floors or floor and wall sections. The assemblies include base members adapted to be positioned and secured to the adjacent structural sections and a leaf spring cover member fixedly interconnected to one of the base members at one end and bridging the expansion joint or space between the structural sections in a cantilever manner such that the cover member lies in a plane essentially flush with the floor section or sections and is structured and dimensioned to be slidably interconnected with the other base member to provide a secure, functionally effective and aesthetically pleasing assembly for accommodating translational relative movement of the structural sections.