10) At each stage of erection, the correct amount of ballast and counter-weight must be properly positioned. On many cranes the counter-weight is set in place on the counter-jib before the main jib is erected.
11) Weight for ballast and counter-weight, as supplied by the manufacturer, should be marked with their weight and secured in position to prevent accidental displacement and damage. Ballast charts, showing the amount, distribution and unit weights of ballast used, must be fitted to the crane base. Charts must be sited on the crane where they can readily be seen at all stages of construction work.
12) Safe means of access must be provided to the cab and throughout the structure for the purpose of inspection and maintenance. Access to the cab will be achieved using a permanent steel ladder, fitted with safety hoops and provided with rest platforms at 9m. vertical intervals.
13) For inspection, access along the jib may be afforded by the provision of an expanded metal walkway inside the jib, with life lines fitted to permit the fixing of safety harnesses, or by the use of an inspection cage suspended from the jib or fitted to the saddle.
14) It is strongly recommended that all tower cranes are fitted with wind speed indicators. Visible in or from the driver’s cabin, and at the base of the crane. If the wind velocity registered is near the manufacturer’s safe working limit, the crane should be placed out of service.
15) An automatic audible alarm must be fitted to sound when rail mounted cranes travel.