Knuckle boom crane

A knuckle boom crane, also knowns as an articulating boom crane, is a kind of standard crane whose boom articulates at the 'knuckle' near the middle, letting it fold back like a finger.

Knuckle boom cranes have become very common on offshore vessels as less of the deck space is blocked by the crane.

Disadvantages of this crane type are the higher power demand and increased maintenance requirement due to the increased number of moving parts.

Knuckle boom crane arms are much lighter than boom truck cranes, and they are designed to allow for more payloads to be carried on the back of the truck that it is mounted on.

The majority of them are mounted behind the cab and leave the entire bed of the truck empty.