•Structural Inspection: Check for cracks in the jib and tower body, broken wires in the steel wire rope (if the number of broken wires in a single strand exceeds 10%, replacement is required), and deformation of the hook; •System Inspection: Test the effectiveness of the brake (when lifting a 1-ton heavy object, the sliding distance after braking ≤ 50mm), the sensitivity of the control system, and the normal operation of the anemometer (operation of tower cranes is prohibited when wind speed exceeds 12m/s).
•Overloading is prohibited (e.g., a crane with a rated lifting capacity of 25 tons is prohibited from hoisting 30-ton objects to avoid structural fracture); •Inclined pulling and hoisting are prohibited (heavy objects must be lifted vertically; inclined pulling will increase the force on the steel wire rope and raise the risk of crane overturning); •Standing under the jib is prohibited (to prevent injury from falling heavy objects; a warning area must be set up in the operation area).
•Daily Maintenance: Clean the equipment surface daily and check the amount of lubricating oil (e.g., gear oil must be added to the winch reducer); •Periodic Maintenance: Check the tension of the steel wire rope monthly, test the hydraulic system pressure quarterly, and conduct comprehensive flaw detection annually (e.g., flaw detection of tower body welds to check for cracks).
