Abstract: A working catwalk, in particular for bridge inspection apparatuses, comprising a floor section and a balustrade on each longitudinal side, to and having a variable width. The floor section consists of a center floor section, extending in the longitudinal center, and lateral additional floors. The balustrades are connected in an articulated manner to the center floor section via cantilever struts which can be pivoted out laterally, the axes of the joints connecting the struts to the center floor running parallel to one another and approximately perpendicularly to the working surface. Alternatively, the balustrades can also be designed as self reinforcing girders.