Which type of construction joint is found at the junction of two floors?

The construction joint that is specifically found at the junction of two floors is indeed the Floor-to-Floor joint. This type of joint is critical in building design and construction as it accommodates the connection and transition between two separate horizontal planes, which are the floors of different levels.

By establishing a Floor-to-Floor joint, engineers and architects effectively manage structural integrity while allowing for possible movement due to thermal expansion, settling, or other forces acting on the structure. This type of joint also plays a significant role in firestop systems, as it helps to maintain the fire-resistive integrity across floor levels, ensuring safety and compliance with fire codes.

Other types of construction joints, such as Floor-to-Wall or Head-of-Wall joints, serve different purposes and are located at different points in the building's design. For instance, Floor-to-Wall joints occur where a floor meets a vertical wall, while Head-of-Wall joints are found at the top of walls that intersect with ceilings or floors.