what you should know about crawler crane

A crawler crane is a tracked vehicle that has a crane mechanism attached to it. Due to its unique track, this crane has the capability to work on every type of ground surface, from hard surface to even on the softest grounds. The specially designed metal tracks make the crawler crane very stable on the ground. It also increased the cranes maneuverability on the ground. The lifting capacity of the crawler crane ranges from 30 to 3000 tons depending on the model. A crawler crane features either a box or a lattice type straight boom and it may be equipped with an optional jib (boom extension).

Crawler cranes consist of a rotating structure for lifting and lowering horizontally on crawler treads. The main parts of crawler cranes:

Hoist – Used to lift and lower load.

Boom – An inclined spar, strut, or other long member supporting the hoisting tackle

Jib – Extension attached to the boom point to provide added boom length for lifting specified loads.

Counter weight – Weights used for balancing loads and the weight of the crane in providing stability.

All crawler cranes consist of several parts. The propulsion system and the tracks are the main parts of the crane. The engine and the control cabin are placed on top of the tracks. A long boom is attached to the cabin and can be raised high above the control cabin. Cables move through the boom and a hook is attached at the end of the boom for catching, lifting and moving various kinds of items and loads from one place to another.

Some crawler crane models come with additional part known as a jib which is attached at the end of the boom. The jib allows the crawler crane to move items even further from its position on the ground. The crawler crane moves like a crawler tractor, but because of its weight it moves very slowly on the ground.

One main feature which allows the crawler crane to lift and move heavy loads without losing control is the counterweight. The counterweights are usually placed at the back of the crane and can weight up to several tons. The crawler crane is a versatile machine, capable of performing and completing various lifting tasks on all types of ground surfaces and weather conditions.

Advantages and Disadvantages of Crawler Crane
The main advantage of the crawler crane is the ability to move and lift items and other heavy loads around the construction site very easily. In addition, the tracks of the crawler crane provide support and increased stability. The crawler crane is not transported fully assembled. They are just too big for the roads. That’s why they are delivered in manageable pieces and assemble on site. This can be a project on its own and will involve a team of professional heavy lift technicians such as riggers & operators. The configuration of the crane is predetermined in advance by the lift engineer based on the customer’s project requirement.

The Cause of Crane Accidents
The major causes of crane accidents to include:

1. Crane buckling or collapsing
All cranes have weight limits to ensure that the crane will not tip over. To counterbalance the weight, cranes use counterweight and out-rigging systems. If the maximum weight is exceeded the crane will be in danger of either buckling or the boom may collapse.

2. Improper Crane Assembly
One of the biggest reasons that a boom collapses is improper assembly. Specifically, if the crane does not have the proper blocking (wood or metal supports) to stabilize the load, the unbalanced load will move and may lead to the crane collapsing.