This European Standard specifies general conditions, requirements and methods to prevent mechanical hazards of cranes by design and theoretical verification. Note: Specific requirements for particular types of crane are given in the appropriate European Standard for the particular crane type. The following is a list of significant hazardous situations and hazardous events that could result in risks to persons during normal use and foreseeable misuse. Clause 4 of this standard is necessary to reduce or eliminate the risks associated with those hazards: a) rigid body instability of the crane or its parts.