Describes power-driven cranes of the tower type used on building sites and engineering construction where the crane is dismantled when it has served its purpose. Both horizontal jib and luffing jib cranes are included and they may be of the travelling, fixed or climbing type. Not intended to apply to power-driven mobile cranes. Covers definitions, information to be supplied with the enquiry or order, information to be supplied by the manufacturer, service conditions, materials, wind, stability, load and radius indication, structural stresses, mechanical and electrical components, hydraulic considerations, other forms of motive power, operational control, safety requirements, testing and protection of crane structure and machinery.