The new 21LC1050 flat-top tower crane from Linden Comansa has three maximum capacities - 25 t, 37.5 t and 50 t - as well as a maximum jib reach of 80 m and a maximum freestanding height of 73.3 m with standard mast. The jib configurations range from 30 to 80 m, in 5 m increments. The crane’s 110 kW hoist mechanism provides a maximum speed of up to 101 m/min.
The 21LC1050 is designed based on the company’s successful model, the 21LC750. It meets the demand for heavy-capacity cranes in Singapore, said Linden Comansa, as the country’s construction sector is moving towards the use of large steel beams, heavy precast concrete elements and volumetric modules (better known as PPVC).
At the same time, Linden Comansa’s 21LC750 flat-top crane has also been upgraded to feature larger capacities. It is now available in 25 t, 37.5 t and 50 t - increased from 24 t, 36 t and 48 t respectively.
The 21LC750 can also be climbed with a maximum 80 m jib, with jib configurations ranging from 30 to 80 m, in 5 m increments. The crane has a freestanding height of 78.8 m with standard mast.
Linden Comansa 21LC750 (second unit on the background) works on the Lake Grande condominium project in Singapore.
Both the 21LC1050 and 21LC750 feature ease of erection as their ‘cat-head’ has been removed. Due to this special design, the cranes’ jib and counterjib are joined together on the turntable, without any apex section. Their standard mast sections have a width of just 2.5 m.
The two models can be equipped with an optional 110 kW hoist motor and a hoist-drum capacity of 1,570 m of rope. They will also be fitted with the new CUBE cab. What’s more, the cranes incorporate the PowerLift system, which improves the load chart by 10% at reduced speeds, as well as the Effi-Plus system for high speed, optimum efficiency and faster working cycles.
Linden Comansa’s LCL700 luffing-jib tower crane is also suitable for the Singapore market. It comes in two versions for the global market: 64 t and 50 t. These maximum capacities can be reduced to 32 t and 25 t respectively, by easily changing from a two-fall system to single pull line, thus increasing hoist speed and productivity.
The crane provides an ideal solution in large cities and congested jobsites, where space is limited. The maximum radius of the LCL700 is 65 m, which can be reduced in increments of 5 to 30 m. The 64 t LCL700 can lift up to 7.2 t at maximum reach, while the 50 t can lift up to 7.5 t. Both cranes have a minimum reach of just 4 m.
The LCL700 boasts an ‘out-of-service’ jib radius of between 20.4 and 17 m, depending on the maximum reach, providing a higher level of safety on the construction site when the crane is not in use.
The radius of the counterjib is also short, just 9.5 m, with the possibility of being reduced to 8.7 m by assembling the crane with steel counterweights instead of standard concrete counterweights. Despite its size, the counterjib is spaciously distributed, enabling the operator to perform maintenance tasks easily.
The maximum freestanding mast height of the LCL700 is 69.8 m. The crane’s tower sections, with a 2.5-m wide frame, are the same as those for the luffing-jib LCL500 and the flat-top 21LC750. As such, owners of those models do not need to reinvest in new tower sections or a climbing cage.
The LCL700 is fitted with a 200 kW hoist motor that enables it to reach high speeds: up to 134 m/min for the 64 t version, and up to 170 m/min for the 50 t. The hoist speed with maximum capacity is naturally reduced, but remains highly competitive: the 64 t LCL700 can lift 64 t with a speed of 17 m/min or 32 t with 34 m/min, while the maximum speed for the 50 t LCL700 is 22 m/min when lifting 50 t loads and 43 m/min for 25 t loads.
Both versions of the LCL700 can feature an optional high-capacity Lebus hoist cable drum, allowing the cranes to be used to construct buildings of over 1,000 m high when using a single pull line, and over 500 m high with a double line. The LCL700 will also come with the new CUBE cab.