HSE has recently completed a fatal accident investigation following the failure of the ceiling of a frozen food store. Two men fell to the floor of the store when insulation panels separated from the steelwork, which supported the ceiling. One of the men died from his injuries.
Following the accident, the investigation revealed that the bolts had consistently failed at the point where the thread entered the metal nut which secured them into the supporting frame. Tests have identified fatigue and corrosion (due to oxidation and exposure to chlorine) as the main reasons for the deterioration of the bolts.