ISO 4306 establishes definitions in English, French and Russian for the most commonly used terms in the field of cranes. This part of ISO 4306 gives the general definition of a tower crane and illustrates the terminology used with each type of tower crane by the use of figures with referenced term numbers. It is applicable to — tower cranes that can be assembled and dismantled; — permanently erected tower cranes; It is not applicable to — mobile boom cranes which may be fitted with a tower attachment; — erection masts, with or without jibs.