The distance measured from the center of the boom hinge pin to the center of the boom tip sheave pin is called what?

• A. Boom Span
• B. Boom Height
• C. Boom Length
• D. Boom Radius

Answer: (C)

The distance from the boom hinge center to the tip sheave center defines the boom’s reach, known as the boom length. This straight-line measurement is the actual length of the boom along its axis, representing how far the boom can extend from the crane base to the tip. It’s the value used for capacity and performance calculations because it directly reflects how far the load line can travel.

Boom height describes how high the tip sits above the ground, which isn’t about how far the boom extends along its axis. Boom radius refers to the horizontal distance to the load (the reach projected horizontally, which changes with the boom angle), not the full along-boom length. Boom span isn’t the standard term used for this along-axis measurement.