TOWER CRANES Ӏ FIBRE ROPE
LIKE-FOR-LIKE
Wolffkran invested in fibre rope manufacturer Trowis in 2019. The fruits of this collaboration were on display in Munich in October, when the tower crane manufacturer demonstrated the Chemnitz rope specialist’s new product, chaRope, at Bauma on its new 6021 FX flattop. When the rope goes on sale in August, it will be offered as an option on Wolff Clear cranes, the new Wolff 21 FX cranes and the Wolff 8033.16 Cross. The new rope is designed to replace steel wire ropes of the
Battery-powered tower cranes in London
Ampd Energy, a player in the energy storage industry, in collaboration with Select Plant Hire, a subsidiary of Laing O'Rourke, has deployed three of its zero-emission ‘Enertainer’ lithium-ion battery energy storage systems at London's high profi le Olympia Redevelopment. Ampd Energy says that its modular lithium-ion
battery solution has the potential to revolutionise the industry by electrifying building sites and driving down carbon emissions The deployment of the Enertainer systems at the
Olympia Redevelopment is estimated to save 192 tonnes of carbon over 12 months, reduce operating costs by 70%, and eliminate the equivalent air pollutants of 975 cars when compared to standard diesel generators. Ampd Energy claims that, over the life of the project,
the Enertainer will be more cost effective than diesel generators, as well as saving space and labour time. According to Ampd Energy, compared to fossil fuel
generators the Enertainer reduces carbon footprints by up to 90%, is up to 30 times quieter, emits zero air pollutants, and eliminates diesel handling and usage risks. It requires minimal maintenance and zero refuelling downtime.
Liebherr’s biggest
crane, is now a fi bre rope crane. The 1188 EC-H offers a boost in capacity compared to its steel wire rope counterpart
same load-bearing capacity and diameter. This means it can – in general, Trowis say – be fitted on standard equipment, with no changes of sheaves, hoists, or load capacities. The fibre rope is designed in a similar way to wire counterparts. Layers of rope are packed together, for maximum density, using a high- tech fibre material. These layers are separated by inner and outer plastic sheathes.
The outer sheath protects the load bearing core rope. It prevents damage from abrasion, UV- radiation, dirt and moisture, and prevents lubricant leaking out of the rope. The sheathes essentially separate the load bearing core from the surface. That means that any damage occurs to the surface, where it is visible and will lead to the rope being discarded, well before the rope loses its load- bearing capacity. The dimensionally-stable rope, which can be spooled on standard drums and over the usual sheaves, can be up to 80% lighter in operation. This means that lighter hook blocks can be used. It has been designed in line with the new ISO technical specification. The rope was shown at Bauma fitted to Wolffkran’s new Wolff 6021 FX, one of three cranes in a ‘family’ of 141–200t/m class flattops. The crane was shown alongside a Wolff 7021 FX, and
38 CRANES TODAY
the trio of cranes is made up by the Wolff 6521 FX. The cranes can be configured with 60, 65 or 70 metre jibs, and maximum lifting capacities of 8.5, 10.5 or 12.5t, on 1.5 or 2.0m tower connections. They share numerous components, Wolffkran says, speeding delivery times, reducing the number of components that must be held in stock, and simplifying the training needed by rigging crews. All of the cranes in the 21 FX
family can lift 2.1t on the jib tip in normal operation, and 2.3t when the Wolff Boost function is activated. The option of installing them on Wolff’s new 1.5m TV 15 tower system makes them suitable for use in countries with narrower lift shafts: this has been a focus for many tower crane markets, as they build their business in growing markets like that in India. The cranes promise compact
transport and simple assembly, with 40m of jib on one truck, and 30m in a shipping container. Component weights have been kept under 7.9t, allowing the crane to be assembled with a 100t mobile crane, at a height of 40m.
A COMMON THREAD Liebherr was one of the pioneers of fibre rope lifting, developing soLITE with Teufelberger. Like the Trowis rope, this solves
the problem of discard criteria by using a multi-layer sheaf. The
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