With the new LCL700 luffing-jib crane, with maximum load capacity of 64 tonnes, Linden Comansa expands its range of products and responds to the growing demand for high-tonnage luffers. Two versions of the LCL700 tower crane aim for large cities where space constraints make for challenging construction projects.
The new Linden Comansa LCL700 comes in two versions of maximum load capacity: 64 and 50 tonnes (141,090 and 110,230 lb). The use of high-tonnage, prefabricated components and extremely large steel beams in construction is a growing trend, based on the fact that it reduces project-completion times. In construction projects involving space constraints, which are becoming increasingly common in the world's largest cities, there is often a need to use large cranes with luffing jibs that enable them to lift extremely heavy loads while avoiding other cranes and nearby buildings.
New York, Seoul, London, Bangkok, Mexico City, Shanghai, Paris, Melbourne, Frankfurt… These are just some of the large cities where this type of tower crane is increasingly required. Linden Comansa has responded to that need with the launch of the LCL700, the largest in its range of luffing-jib tower cranes to date.
Two versions of the LCL700 are launched on the global market, with maximum load capacities of 64 and 50 tonnes (141,090 and 110,230 lb). By means of manual modifications, the maximum load capacity of the cranes can be reduced to 32 and 25 tonnes respectively (70,550 and 55,120 lb), resulting in increased hoist speed and productivity.
This change on the hoist system from double line to single pull line is one of the adjustments that have been implemented into this model based on recommendations from Linden Comansa clients.
Features of the LCL700 Luffing-Jib Crane
The maximum radius of the LCL700 is 65 metres (213.3 ft) and can be reduced in increments of 5 metres to 30 (98.4 ft). The LCL700 64t can lift a maximum load of 7.2 tonnes at maximum reach (15,870 lb), while the LCL700 50t can lift 7.5 t (16,530 lb). The minimum reach of both models is just 4 metres (13.1 ft), allowing maximum use of the space at the construction site. The LCL700 also offers a 'out-of-service' jib radius of between 20.4 and 16 metres (66.9 - 52.5 ft), depending on the maximum reach, providing a greater level of safety on the construction site when the crane is not in use.
The radius of the counter-jib is also short, measuring just 9.5 metres (31.2 ft), with the potential to be reduced to 8.7 metres (28.5 ft) by assembling the crane with steel counterweights rather than the standard concrete counterweights. Despite its size, the counter-jib is spaciously distributed, wanting the operator to work and perform maintenance tasks easily.
The maximum free-standing height of the LCL700 is 69.8 metres (229.0 ft), on anchor feet. The LCL700 tower sections, with a 2.5-metre wide frame, are the same as for the luffing-jib LCL500 model and the flat-top 21LC750. This eliminates the need for owners of those models to re-invest in tower sections or the climbing cage.
This luffing-jib crane from Linden Comansa has a 200 kW hoist motor (268 hp) that enables high speeds: up to 134 metres per minute for the LCL700 64t (440 ft/min), and 170 m/min for the LCL700 50t (558 ft/min). The hoist speed with maximum load capacity is naturally reduced, but remains competitive: the LCL700 64t can lift 64 tonnes at a speed of 17 m/min (56 ft/min) or 32t at 34 m/min (112 ft/min), while the maximum speed for the 50t version is 22 m/min (72 ft/min) when lifting 50-tonne loads and 43 m/min (141 ft/min) when lifting 25 t loads. Both models feature a high-capacity Lebus hoist cable drum, enabling them to be used to construct buildings of over 1000 metres in height (3,400 ft) when using the single pull line, and buildings of over 500 metres in height (1,600 ft) when using the double line.
The LCL700 leaves the factory ready for quick assembly with pre-assembled luffing reevings, thus allowing on-site erectors to work faster and the assembly time to be reduced. The components can be quickly connected using bolts, the accesses are wide and easily-assembled, and the erection weights have been improved. The heaviest weight for a quick crane assembly would be 18.5 tonnes (40,785 lb) and can be reduced to 13 tonnes (28,660 lb) by removing some of the components pre-assembled at the factory and lifting them separately.
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