Читать книгу Risk Assessment - Marvin Rausand - Страница 50

A crane is used to lift heavy elements on a construction site. The lifting operation has several hazards. One of these is the potential energy of a lifted element. This hazard is an intrinsic hazard of the lifting operation because it is not possible to lift anything without creating potential energy. The potential energy can be released, for example, if the hazardous event “chain breaks” occurs. This event leads to “uncontrolled fall of the element.” The consequence of the fall depends on where the element falls down – if there are people or important equipment (i.e. assets) in the area. The concepts used in this example are shown in Figure 2.1 .

Figure 2.1 Hazard (a), event (b), and consequence (c) (Example 2.4).