1975: K-10000 Tower Crane
Innovation: Largest Tower Crane in the World
By: KRØLL Cranes A/S, Berthold Lang
The KRØLL K-10000 has held the title of the world’s largest tower crane for over 35 years. Standing almost 400 feet tall with a 266 foot jib reach, the standard jib model can lift 120 tons at a radius of 269 feet. The long jib model can lift 94 tons to a radius of 330 ft. The K-10000 can rotate 360° once it has been bolted to its 40 foot diameter concrete base. This allows the crane to cover an area of 7.5 acres, or approximately 6 football fields. A second servicing crane is attached to the top for the original construction and future maintenance of the K-10000. A system of three counterweights, one set and two mobile on trolleys, weighing a total of 100 tons, are used to balance the crane. Under this load the crane can withstand wind speeds of up to 175 mph.  With its immense jib span and load capacity the K-10000 decreases the time for construction on huge construction projects by eliminating the need for small cranes and crawlers.
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