A knuckle boom crane looks like a typical crane. The key difference is that the boom is capable of folding back like a finger because the boom articulates at the "knuckle" near the center. This enables the equipment to be able to transform into a compact size for storage and maneuvering.
Normally, the arm on a knuckle boom crane is somewhat a bit lighter than boom truck cranes. The crane arm is designed to allow more payloads to be carried on the back of the mounted vehicle. Nearly all knuckle boom cranes are mounted behind the cab. This leaves the whole bed of the truck empty.
Smaller models of knuckle boom cranes can be used without a certified crane operator, if the load capacity of the machine is less than 15,000 lbs. or if the boom's maximum length is less than 25 feet long.
There are various types of control systems for the cranes. For example, there is radio remote control, control from the ground, seated and stand up control. The radio remote systems are capable of running the crane as well as starting it. In addition, many models come equipped with a computer readout system that provides system readouts immediately reporting if the crane is overloaded or not.
Personnel Lifts
Snorkel Personnel Lifts are designed for facilities maintenance professionals and contractors. These lifts are portable, inexpensive, lightweight work platforms made for interior use. The patented Girder Lock mast design by Snorkel provides superb flexibility and excellent reach. This system, used in the UL Series, offers great lift capacity.
The Snorkel PAM Series and UL Series Personnel lifts have been designed and built so as to be easy for one person to operate. These equipment are easy to transport. They can easily pass through a standard sized doorway and be pushed smoothly into position. These lifts are capable of being erected in minutes and being able to provide working heights of up to 46 feet, they are an effective alternative to scaffold towers.