Crane cabs are constructed as compactly as possible so that when the crane rotates along with the cab there is a little overhang, which may strike other objects as possible and to generally allow the maximum freedom of movement for the cab and crane. In addition, such cabs are usually formed largely of glass, at least in the upper portions, to increase the visibility from the cab and consequently the safety of the crane operation.
The crane that is finally selected for the project should be properly certified. Many, if not all, states have standards with which erection subcontractors must comply. Prudent contractors make certain they have available at the jobsite documentation attesting to the cranes certification. The contractor should also obtain a certificate of liability insurance from the erection subcontractor.
Crane crash avoidance sensor is used as an early warning sensor for preventing collision of overhead cranes running of the same rails. These are installed face-to-face on adjacent overhead cranes running on the same rails. When one crane approaches the detection area of an adjacent crane, its sensor detects the microwaves transmitted by the sensor mounted on the opposite crane and an alarm is generated, thus preventing collision.