Abstract: A tower superstructure of a ropeway transport installation includes a bar and a catwalk. A first fixing part is fixed to the bar and a second fixing part is fixed to the catwalk. The first fixing part is a hook. The second fixing part defines a hole receiving the hook. The hook defines a downward vertical insertion direction. The hook and hole are able to sink into one another in the insertion direction until the catwalk is in abutment against the bar. The hook defines a decreasing cross-section in the insertion direction up to the position where the catwalk is in abutment to move the catwalk and bar towards one another.