Background information:
Gauze windows occur in places where people can relatively easily get close to the catenary. These gauze windows are found on viaducts where the track runs underneath.
Sometimes gauze windows can also be found in places where unqualified maintenance personnel can get close to the wires, such as in a situation where the post of an catenary gantry protrudes through a platform roof.
The goal always remains the same; keep people at a safe distance from the high voltage on the catenary.