catwalk to allow access to and from a ladder or stairs the gate is urged to the closed position by springs the improvement is an attachment for connecting to the lower side of existing gates to prevent workmen using the catwalk from slipping under the gate and falling into the opening for stairs or a ladder application_number US 4095708 A description fig1 depicts a gate 10 comprising a frame 12 having horizontal members 14 a 14 b 14 c and 14 d in an alternative embodiment the frame 12 may include more or fewer horizontal members but in no case fewer than two such members as will be explained in further detail below the horizontal members are joined by a first vertical plate 16 a and a second vertical plate 16 b to form a substantially rigid frame 12 capable of withstanding normal wear and tear of a safety gate the frame 12 is preferably formed from an elongated flat plate about two inches wide that is bent into the shape shown in fig1 and then the additional members welded to the bent form the horizontal member 14 b extends to define a horizontal extension 18 b and the horizontal member 14 c extends to define a horizontal extension 18 c an axle 20 spans the space between the extensions 18 b.