The carrier is defined as which portion of the crane?

• A. The arm
• B. The mast
• C. The jib
• D. The body

Answer: (D)

Understanding crane terminology starts with knowing what the carrier represents. The carrier is the crane’s main frame—the solid body that supports and anchors all the other parts. It’s the base structure that carries the upper works, counterweights, drive mechanism, and any cab or controls, and from which the hoisting equipment is mounted and operated.

The other terms describe parts that extend or support the load rather than form the crane’s central structure. The arm (or boom) extends outward to reach loads; the mast provides vertical support in some designs; and the jib is an additional horizontal extension for reaching with less central support. None of these are the primary frame itself—the carrier is the body that everything else attaches to and moves with.