This Malaysian Standard establishes a classification of tower cranes as defined in ISO 4306-3, according to their category. NOTE 1. For the classification of cranes, as defined in ISO 4306-1, based on the number of operating cycles to be carried out during the expected life of the crane and a load spectrum factor which represents a nominal state of loading, see ISO 4301-1. lt applies to the classification of - tower cranes for building and general construction work that tan be dismantled. - permanently erected tower cranes. - hammerhead cranes. - dockside and shipbuilders’ tower cranes. lt does not apply to the classification of - power-driven mobile jib cranes which may be fit- ted with a tower attachment . - erection masts, with or without jibs.

等同采用ISO 4301-3:1993, Cranes – Classification – Part 3: Tower cranes