In an incident involving the fall of the person from height, investigation of the incident revealed damaged safety belt. Though the person used a safety belt, when he slipped and fell, the belt got broken near the hook. The belt got damaged from weld sparks.
In another incident of fall of a person, the person did not buckle the belt properly.
These examples stress the need for use of proper PPE, checking for its integrity before use, training the personnel for safe use, and supervision.