Cantilever is defined as:

• A. The operation of an aerial device with the tip or platform unsupported in the air and not resting on an object.
• B. The device is resting on a support.
• C. The platform fully supported by a basket.
• D. The cantilever is not allowed in aerial devices.

Answer: (A)

Cantilever refers to the aerial device setup where the end of the boom and the platform extend out without any support at the tip. In this arrangement, the tip or platform is unsupported in the air and not resting on an object, which creates a longer moment arm and greater stability risk. This is exactly what the definition describes. The other scenarios describe configurations where the device or platform is supported by a surface or basket, or state a restriction, which are not what cantilever means.