Working on behalf of the Saudi Arabian construction and real estate company, Saudi Bin Ladin Group (SBG), Roots Group is using thirteen Wolff cranes for the construction of the Jeddah Tower, which when constructed will become the tallest building in the world at over 1,000m above sea level.
Twelve Wolff 7532 saddle jib cranes are being used for moving ground loads and construction of the podium at the base of the tower. A Wolff 355 B luffing crane with a 40-meter jib and a maximum lifting capacity of 28t is positioned in the triangular shaped core of the tower, forming the focal point of the Y-shaped building floorplan (see image). A second Wolff 355 B is to be set up in the very near future.
Both luffers are on 48m high towers and are raised step by step with the building, by means of an internal climbing procedure, up to a height of approximately 580m. They "jump" between 12 to 15.5m higher with every climbing step.
According to the project plan in the next phase of the construction, one of the luffers should be moved to a platform especially established for the crane at a height of 538m, where it will work on the outside of the building with an anticipated hook height of 734m. It is then planned to disassemble it again and reassembled it at 630m above sea level, to achieve its expected ultimate hook height of almost 800m.
