Heavy mobile cranes are essential machines used in various industries such as construction, transportation, and manufacturing. They are designed to lift, move, and position heavy objects, materials, and equipment with precision and efficiency. Heavy mobile cranes are mounted on a wheeled or tracked vehicle, allowing them to move around the job site and position themselves for optimal lifting. They are versatile machines that can be used for various applications, such as building construction, bridge construction, mining, and offshore operations.
This article will discuss the different types of heavy mobile cranes, their features, and applications. It will also cover the safety considerations involved in operating heavy mobile cranes and the training requirements for crane operators.
Types of Heavy Mobile Cranes
There are several types of heavy mobile cranes, each designed for specific lifting applications. The most common types of heavy mobile cranes include:
- All-terrain cranes
All-terrain cranes are mobile cranes that can travel on public roads and rough terrain. They have multi-axle steering systems and can lift heavy loads up to several hundred tons. All-terrain cranes are versatile machines that can be used in various applications, such as construction, oil and gas, and mining.
- Rough terrain cranes
Rough terrain cranes are designed to work in off-road conditions and rough terrain. They have a robust chassis, four-wheel drive, and can lift heavy loads up to several hundred tons. Rough terrain cranes are commonly used in construction and mining operations.
- Truck-mounted cranes
Truck-mounted cranes are mobile cranes mounted on a truck chassis. They have a hydraulic system that enables them to lift and move heavy loads. Truck-mounted cranes are versatile machines that can be used in various applications, such as construction, logistics, and emergency services.
- Crawler cranes
Crawler cranes are mobile cranes that move on tracks rather than wheels. They have a high lifting capacity and can lift heavy loads up to several thousand tons. Crawler cranes are commonly used in heavy lifting operations, such as bridge construction, mining, and offshore operations.
- Tower cranes
Tower cranes are stationary cranes that are typically used in construction sites. They have a tall tower that supports a long jib with a hook at the end. Tower cranes can lift heavy loads up to several tons and are commonly used in building construction.
Features of Heavy Mobile Cranes
Heavy mobile cranes have various features that make them efficient and effective in lifting heavy loads. Some of the essential features of heavy mobile cranes include:
- Telescopic boom
Heavy mobile cranes have a telescopic boom that can extend and retract to reach the desired height and distance. The telescopic boom can be extended by hydraulics, and it can reach heights up to several hundred feet.
- Jib or luffing boom
Some heavy mobile cranes may also have a jib or luffing boom that can be attached to the main boom. The jib or luffing boom provides additional reach and lifting capacity for more precise lifting.
Heavy mobile cranes have counterweights that provide stability and balance when lifting heavy loads. The counterweights are typically located at the back of the crane and can be adjusted based on the weight of the load being lifted.
- Control system
Heavy mobile cranes have a control system that enables the operator to control the crane’s movement and lifting. The control system includes various switches and joysticks that control the boom’s movement, rotation, and extension.
- Safety features
Heavy mobile cranes have various safety features, such as load moment indicators, anti-two block systems, and automatic brakes. These safety features ensure that the crane is operated safely