Last week's newsletter focused on the cleanliness of the crane cab and what this can convey about the operator. This week we are taking a quick look at the construction of the cab.

The operator's cab is designed to protect against weather. Modern cranes have electronic systems such as: load moment indicators, rated capacity indicators, and rated capacity limiters, which must be protected from the elements. As a result, doors should be closed at night or during wet weather. The cab door must be restrained from accidentally opening/closing and should be lockable to prevent unauthorized entry when left unattended. The door adjacent to the operator shall open outward (swinging doors) or if sliding, slide rearward to open.

The cab must provide the operator with a clear and unrestricted view of the load, the boom tip, and the surrounding job site. Visibility to either side is provided to give the operator 180-degree or greater vision to the site. Cab windows shall be constructed with safety glass or equivalent and they must remain crack-free and clean at all times. A crack in a window can produce a blinding effect when sunlight or other forms of light refract off the crack. Windows that open provide ventilation and must be properly secured to prevent accidental closure. Windshield wipers are typically provided for the front and overhead windows. Wipers must effectively clear the window so vision is not obstructed, and wiper blades must be replaced regularly.

Mirrors provide the required view to the rear of the operator. Additional mirrors may include those for viewing hoist drum(s) and outriggers in their extended and/or retracted position. Crane operators and owners should ensure that all mirrors are properly in place, clean and properly adjusted.