Every year, cranes lift loads heavier than a space shuttle. Bridges are swung into place. Factory roofs are hoisted in single pieces. What keeps these thousands of tons from crashing down?
Identifying the Center of Gravity is critical for ensuring the load remains level during the lift. If the CoG is not directly under the hook, the load will shift until it is, potentially causing a "shock load" or sling failure. Calculation: , where is the distance from a reference point to the CoG. rigging engineering calculations pdf free download
Avoid "short rigging." As the angle from the vertical increases, the tension spikes, often requiring much higher capacity gear than the static weight suggests. 3. Center of Gravity (CoG) and Load Distribution Every year, cranes lift loads heavier than a space shuttle