Crane Load Moment Indicator

Crane Load Moment Indicator

About Crane Load Moment Indicator 

The crane load moment indicator is a safety device that measures and monitors the weight and angle of a crane's boom. It calculates the load moment on the crane based on the boom angle, length, and weight othe load, providing real-time data and alerts to the crane operator when the crane approaches its load limits. A Crane Load Moment Indicator (LMI) is a safety device installed on cranes to help prevent accidents caused by overloading or tipping.

🔹 How it Works:

• It continuously monitors the load weight being lifted.

• It also measures the boom length, boom angle, and radius (distance from the crane’s center of rotation to the load).

• The LMI compares this with the safe load chart of the crane.

🔹 Functions of an LMI:

• Alerts the operator with visual and audio alarms when the crane approaches unsafe conditions.

• Displays real-time load, angle, and capacity usage.

• Helps maintain crane stability and prevents structural damage.

• Enhances safety for workers, crane, and site operations.

🔹 Components of LMI:

1. Display Unit (Operator’s Cab) – shows load, angle, radius, % of rated capacity.

2. Sensors – load cells, angle sensors, and length sensors.

3. Alarms & Cutoff Systems – provide warnings and can stop unsafe crane functions.