Crane hoisting operations involve using cranes to lift and move heavy materials, equipment, or objects vertically and horizontally. These operations are commonly used in construction, manufacturing, shipping, and other industries where large, heavy loads need to be moved.
Types of Cranes Used in Hoisting Operations
Tower Cranes: Commonly used in construction for high-rise buildings and large-scale projects.
Mobile Cranes: These can be moved from one site to another and are used for lifting heavy loads.
Overhead Cranes (Bridge Cranes): Installed in industrial settings and warehouses for lifting heavy loads along a fixed path.
Crawler Cranes: Large, track-mounted cranes suitable for rough terrains.
Articulating Cranes: Cranes with an arm that can bend to navigate around obstacles.
Crane Components
Boom: The long, horizontal arm that extends to lift and lower the load.
Hoist: A device used to raise or lower the load. It typically involves a motor or winch system.
Hook: Attached to the hoist to grab the load.
Counterweights: These are added to the crane to maintain stability while lifting heavy loads.
Sling/Chain: Used to secure the load to the crane for lifting.
Cab or Operator's Station: The area from which the crane operator controls the hoisting process.
Safety Station
Before lifting, make sure to perform a proper mechanical inspection of the crane. Verify that the crane is suitable for the weight and size of the load. Secure the load with appropriate slings, chains or other rigging equipment. Make sure the load is balanced and stable. It is unsafe to work or walk directly under the object being lifted, as the object may fall on you. During lifting operations, the area under the boom, under the object being lifted, in front of the object being lifted, in the triangular area of the guide wheel steel rope, around the fast rope, standing on the inclined hook or in the force direction of the guide wheel are all very dangerous positions. Therefore, the position of the staff is very important. Not only should we always pay attention, but we should also remind each other, check and implement, and prevent accidents.
Correctly understand the safety factor of the sling
During lifting operations, workers do not have a correct understanding of the safety factor of the lifting belt, and often think that the lifting belt can be used without breaking, resulting in overweight operations always being in a dangerous state. Make sure there are no obstacles in the lifting and moving path of the crane.
The crane operator uses the control device to lift and move the load. The operator must follow the load chart, which indicates the safe lifting capacity of different crane configurations (boom length, angle, counterweight, etc.). Once lifted, the crane operator moves the load to the desired position, ensuring that it remains stable throughout the move. The hoisting mechanism is engaged to lift the load, and the load should be lifted at a controlled rate to prevent swinging.
Demolition must be foresighted
Demolition operations must be foresighted for various factors encountered. Estimation of the weight of the object, the thoroughness of the cut, the increase in the load squeezed by the demolished part, and forcible lifting of the connected parts without inspection are not allowed. After the load reaches the destination, the operator carefully lowers it into place. After the load is set, the rigging equipment is safely removed.
Eliminate incorrect operations
Lifting operations are different from many constructions. It involves a large area and often uses different units and different types of cranes. Factors such as daily operating habits, performance, and differences in command signals can easily lead to incorrect operations, so be especially careful. Crane operators must be well trained in crane operation, load handling, and safety procedures. Qualified signalmen can assist operators by guiding the operator through hand gestures or radio.
The drum rope is not tight
For large-scale lifting and dismantling, the steel rope wound on the drum of the crane or motor-driven winch is arranged loosely, causing the fast rope with a large load to be pulled into the rope bundle, causing the fast rope to shake violently and easily lose stability. This may lead to the danger of continuing to operate and the embarrassing situation of stopping work and being unable to stop.
Communication Protocols
Effective communication between the crane operator, ground crew, and signal person is crucial for safety. Radios or hand signals are typically used.These are used to convey commands and are essential when visual contact is difficult.
In summary, crane hoisting operations require careful planning, equipment checks, and adherence to safety protocols. Proper training and understanding of the crane's limits and capabilities are crucial for ensuring safe and efficient operation.
