What kind of jobs are related to working at height?

Paragraph 3 of the Rules on Occupational Safety at work at height states: work at height includes work in which:

a) there are risks associated with a possible fall of an employee from a height of 1.8 m or more, including:

when an employee ascends to a height of more than 5 m, or descends from a height of more than 5 m on a ladder, the angle of inclination of which to the horizontal surface is more than 75 °;

when carrying out work on sites at a distance closer than 2 m from non-fenced height differences of more than 1.8 m, as well as if the height of the protective fence of the sites is less than 1.1 m;

b) there are risks associated with a possible fall of an employee from a height of less than 1.8 m if the work is carried out on machines or mechanisms, the surface of liquid or loose fine materials, protruding objects.