Heavy rains spawned by Hurricane Danny flooded many parts of Charlotte, N.C.Floodwatersrose so quickly in Little Sugar Creek that the underpinnings of a train trestle collapsed, bringing a柴油机车crashing down into the creek. As you might imagine, a 412,000-pound (186,880-kilogram) locomotive is not easily lifted. After the waters receded, emergency teams brought in three large hydraulic truck cranes -- one 500-ton, one 300-ton and one 175-ton -- to lift the train out of the creek bed and back onto the train tracks.
Hydraulic cranes may be simple by design but they can perform Herculean tasks that would otherwise seem impossible. In a matter of minutes, these machines are able to raise multitonbridgebeams on highways and heavy equipment in factories and even lift beachfront houses onto pilings. Hydraulic truck cranes are also used to lift虎鲸like Shamu out of water tanks when places like SeaWorld ship the whales to new destinations.
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When watching a hydraulic truck crane in action, it's hard to believe just how much weight it's moving because it deals with these multiton objects with relative ease. Hydraulic truck cranes vary in lifting power. It's easy to tell how much a particular hydraulic truck crane can lift just by the name of it: A 40-ton crane can lift 40 short tons (80,000 pounds or 36,287 kilograms).
Climb into the cab and we'll show you just how these machines are operated.