TOWER CRANES Ӏ SECTOR REPORT
With a maximum jib length of
83 metres, the 520 EC-B 20 Fibre is capable of lifting 2.9 tonnes at the jib head and comes equipped with a connection for the 24 HC 420 and 24 HC 630 tower systems. A freestanding hook height of up to 96 metres is also possible. The jib can be flexibly adjusted in 2.5-metre increments depending on site requirements. The 520 EC-B 20 Fibre requires
j in densely built-up inner city
areas, says Liebherr, due to its high hook heights and minimal space and slewing requirements. The 258 HC-L 10/18 Fibre
achieves comparable hook heights to the 230 HC-L 8/16 steel rope model. At a maximum jib length of 60 metres, the jib head load capacity is 2.5 tonnes compared to the 230 HC-L 8/16 which manages 1.9 tonnes.
Liebherr has also increased the maximum lifting capacity of the 258 HC-L 10/18 Fibre by 25 percent to 10 tonnes in one-line operation.
The crane can use the 355 IC
tower system for climbing inside buildings. There is also the option of using the 24 HC tower system, starting with the 24 HC 420, which offers assembly with only one taper pin connection per corner post. Liebherr also showed its 520 EC-B 20 Fibre (with fibre rope) flat-top, the largest addition to Liebherr’s ‘Tough Guys’ series, which is also available for order worldwide. The crane has a lifting
capacity of up to 20 tonnes and is in demand for handling heavy prefabricated concrete components, says Liebherr. The crane offers increased
performance due to the use of a wider fibre rope. The fibre rope for the 520 EC-B 20 Fibre measures 25 millimetres in diameter compared to the 20 and 22 millimetres versions already available.
20 CRANES TODAY
Wolffkran demonstrated a high-performance fibre rope named ChaRope at Bauma
five transport units to deliver the slewing section and jib, including counter-ballast, to the job site. Another crane manufacturer
showcasing fibre rope technology at Bauma was tower crane manufacturer Wolffkran. It has been working in conjunction with German rope manufacturer Trowis to develop a high-performance fibre rope named ChaRope. The rope design consists of a
The Wolff 8076 Compact
multi-layered, twisted rope core made of high-tensile fibres and an abrasion-resistant, thin-walled fibre composite cover. The fibre rope has the same diameter as a steel rope and is thus significantly thinner than comparable products from competitors, says Wolffkran. Wolffkran and Trowis are offering 12- and 16-mm diameter crane ropes at market entry. “All Wolff cranes with 12- or 16mm steel wire rope can be equipped with the new chaRope fibre rope,” says Wolffkran’s chief technical officer Thomas Heidrich.
“The ropes are fully compatible with the crane series, and no adjustments to the rope sheaves, hoisting gear, or load capacities have to be made. In our current portfolio, this applies to all models in the Wolff Clear series, the new Wolff 21 FX cranes, and the Wolff 8033.16 Cross."
CRANE FAMILY With regards new crane models Wolffkran used the show to present the Wolff FX 21 Clear crane family. The new ‘crane family’ concept is designed to provide flexibility in switching between three flat-top models in the 141-200 tonne class: the FX 6021 Clear; the FX 6521 Clear; and the FX 7021 Clear. This means, for example, that
the Wolff FX 6021 base model can be upgraded to the two larger family members by exchanging just a few components. All three models have a tip load capacity of 2.1 tonnes.
The 200 tonne Wolff 7021 FX has a 70-metre jib and a lifting capacity of 12.5 tonnes. The Wolff 6521 FX, has a 65-metre jib and maximum lifting capacity of 12.5 tonnes. And the Wolff 6021 FX has a 60-metre jib and a maximum lifting capacity of 10.5 tonnes. The Wolff 21 FX family cranes
are pure two-fall cranes. They are each available with two hoist winches: the Wolff 6021 FX with an 8.5 tonne and a 10.5 tonne hoist winch; the Wolff 6521 FX and 7021 FX with the same 10.5 tonne hoist winch as their smaller sibling, and a 12.5 tonne hoist winch. At the tip, all three models lift 2.3 tonnes with the Wolff Boost function activated and all three models are available with a 2.0 x 2.0-metre UV/TV 20 tower connection or a 1.5 x 1.5-metre connection for Wolffkran's new TV 15 tower system. The jib section’s lower
f
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53
