New Comansa flat top
By Christian Shelton03 September 2018
Spanish tower crane manufacturer Comansa is expanding its range of high capacity tower cranes with a new flat-top model: the 21LC1050. Three versions of the new crane will be available with maximum load capacities of 25, 37.5 and 50 tonnes.
The 21LC1050 and can be erected with reach of between 30 and 80 metres, with configurations available every five metres. An optional jib configuration is also available, enabling a reach of 85 metres.
Comansa says the new crane will be particularly suited to large industrial and mining applications, as well as the construction of heavy prefabricated buildings and steel structures.
According to Comansa, the 21LC1050’s slewing design is similar to its 21LC750 and 21LC660 cranes where the jib and counter jib join directly to the slewing part. This allows fast and safe assembly, says Comansa.
The 21LC1050 also shares a large part of the jib and counter jib sections with Comansa’s smaller 21LC750 and 21LC660 models.
A number of different counter jib configurations are also possible, as the counter jib comprises five modular elements that enable up to six different configurations. For example, when the crane is assembled with its maximum 80 metre range, the counter jib radius is 31 m; this can be reduced to 27 m when the range is 50 m; or to 21 m when the reach is 30 metres. The counter jib radius can be reduced by another 0.9 metres in all its configurations by using steel counterweights, which are offered as an optional extra.
The 21LC1050 is erected on a new 2.5-metre-wide D36B tower section which is compatible with Comansa’s other mast sections of the same width. With fixing angles the 21LC1050 can reach a freestanding height of 73.3 metres; when combined with larger width sections, this increases to over 98 m.
The 21LC1050’s hoist cable is only 20 mm in diameter, enabling the drums to have a high cable capacity. The standard hoist is a 65 kW mechanism with the capacity for 720 metres of cable. It can reach speeds of up to 166 metres per minute in the 25 t and 37.5 t versions of the crane and 83 metres per minute in the 50 t version. For projects in which it is necessary to reach speeds of up to 300 metres per minute, 110 kW and 132 kW versions are available. In addition, drums can be issued with Lebus drums with a capacity for 1,570 metres of cable.
The crane can be switched between using a single or double trolley system, and the reeving changes automatically. The single system provides improved tip loading capacity and can reach higher lifting speeds, says Comansa. With the double trolley system the crane can work with heavier loads.
The 21LC1050 comes with the PowerLift system as standard. This allows the crane to improve the load diagram by 10 percent without exceeding the nominal capacity. The crane has a new, faster climbing cage, the J3-20, which has a pushing force of 200 tonnes and takes less time to assemble, says Comansa. The crane also comes with Comansa’s Cube cab in XL format – the largest cab Comansa makes.
Tower crane manufacturer Linden Comansa has announced it has returned to using its original name, Comansa, as part of a brand overhaul. The change will be implemented across the company’s product range and at the company´s facilities in Spain, the US and China.