The model sits at the bottom of the ‘clear’ topless city tower range: the 6015clear with 140 mt load moment, the WOLFF 6023clear with 180 mt load moment, and the WOLFF 6031clear with 224 mt load moment.
The WOLFF 6015clear offers three different tower connections (UV 15, TFS 20 and UV 20) and two different hoisting winches. The smaller hoisting winch, Hw 628 FU, has an installed motor power of 28 kW. The more powerful hoisting winch, Hw 845 FU, with 45 kW can also be used. Both hoisting winches offer a hook path of 190 m. Considerable part-load working speeds are achieved through the use of frequency-controlled winches. With the higher-power hoisting winch, Hw 845, speeds of 115 m/minute are possible, even with a load of 1.6 tonnes, which corresponds to the weight of a medium- sized passenger car.
The driver’s cabin and the electric cabinet are placed on a steel platform which can be bolted on. Due this design the crane is supplied with power immediately after successful installation of this unit, eliminating the need for manual rotation of the upper part of the crane to assemble the jib and counter jib.
Furthermore maintenance and inspections of the electric cabinet take place very close to the crane driver, which makes communication a great deal simpler.
The counter jib is manufactured in one piece. The dimensions are optimised for container transport. At the rear end a permanent 1.8 tonne counter ballast block is placed in the girder of the counter jib. The hoisting platform is installed directly above it. The hoist winch can be changed quickly by undoing a few bolts. Ten uniform counterweight units weighing 2.05 tonnes are positioned directly in front of the hoist winch. Due to the uniform counterweights, the logistics of the counterweights are noticeably easier. For simpler assembly of the counter jib’s tie bars, small support brackets are provided as standard. Thus the assembly of the counter jib becomes noticeably simpler and temporary auxiliary appliances on the building site are no longer necessary. Large-scale platforms were created on top of the counter jib for safe access to hoist winch and counterweights. The counter jib thus comes completely free of additional, loose platforms which are outside of the main beams.
The two-rope fall trolleys have been standardised and can be used with all three clear cranes. As is already the case in the other clear cranes the trolley is provided with a service cage. Using this, the assembler can travel to the end of the jib while reeling in the hoisting rope and doesn’t have to walk along the jib.
Furthermore all WOLFF cranes offer a teleservice module with auto-call function. With this feature the crane automatically “phones” the WOLFFKRAN control centre if an error persists over a certain period of time.
