Introduction to Health and Safety at Work

17.27.9
Dangerous occurrences – Schedule 2 
summary
PART I General
1. 
Lifting machinery
, etc.
The collapse, overturning, or the failure of any load-
bearing part of lifts and lifting equipment.
2. 
Pressure systems
The failure of any closed vessel or of any associated 
pipe-work, in which the internal pressure was above 
or below atmospheric pressure.

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3. 
Freight containers
The failure of any freight container in any of its load-
bearing parts.
4. 
Overhead electric lines
Any unintentional incident in which plant or equip-
ment comes into contact with overhead power lines.
5. 
Electrical short circuit
Electrical short circuit or overload attended by fi re or 
explosion.
6. 
Explosives
The unintentional explosion or ignition of explosives, 
misfi re, the failure of the shots in any demolition 
operation to cause the intended extent of collapse, 
the projection of material beyond the boundary of the 
site, any injury to a person resulting from the explo-
sion or discharge of any explosives or detonator.
7. 
Biological agents
Any accident or incident which resulted, or could 
have resulted, in the release or escape of a bio-
logical agent likely to cause severe human infection 
or illness.
8. 
Malfunction of radiation generators, etc.
Any incident in which the malfunction of a radiation 
generator or its ancillary equipment used in fi xed or 
mobile industrial radiography, the irradiation of food 
or the processing of products by irradiation, causes 
it to fail to de-energize at the end of the intended 
exposure period; or to fail to return to its safe pos-
ition at the end of the intended exposure period.
9.