ISO 4301-3 provides the classification of tower cranes for construction work as defined in ISO 4306-3, and gives specific requirements for steel supporting structure, mechanisms, ropes, and further components based on standard service conditions, mainly expressed by the following:
Tower cranes for construction work are exclusively equipped with a hook as load-handling device. For tower cranes intended to be used for other purposes and/or equipped with other load handling devices, other values according to the specified usage of the tower crane may result
ISO 4301-3 on the classification of cranes is applicable to:
It is essential to classify the crane type as a whole to specify the intended design life at first. The classification of the cranes' structural parts, mechanisms, ropes, or components is then derived from this basic assumption considering statistical effects with the usage of those.
ISO 4301-3 gives the minimum design requirement for the classification of tower cranes erected from parts, self-erecting towers, mobile self-erecting tower cranes, together with the recommended classification of its structural parts, mechanisms, ropes and components.
ISO 4301-3 replaces the first edition ISO 4301-3:1993, which has been technically revised.
The main changes compared to the previous edition are as follows:
ISO 4301-3