Comansa, a leading manufacturer of tower cranes for construction, has announced the upgrade of its two flat-top tower cranes - 21LC660 and 21LC750.

These large flat-top tower cranes increase their maximum load capacity up to 50 tonnes among other improvements.

The design of new solutions for the 21LC1050 Flat-Top tower crane, launched two months ago (September 2018), allowed Comansa’s R&D team to apply some of these developments to two of the manufacturer’s most successful cranes.

These large Flat-Top tower cranes increase their maximum load capacity up to 50 tonnes (110,230 lb), among other improvements

Thus, models 21LC660 and 21LC750, mainly designed for large industrial projects, energy, mining and PPVC construction, improved their performance significantly.

The versions of 24, 36 and 48 tonnes (52,910, 79,360 and 105,820 lb) of both models have increased their maximum load capacity to 25, 37.5 and 50 tonnes (55,120, 82,670 and 110,230 lb), said the statement from Comansa.

This improvement is achieved thanks to the use of a compacted wire rope, of smaller diameter, and an optimized design of the now lighter trolley-hook set. Such change does not only increase the maximum load capacity of the crane, but also improves the loads in all radius, including the jib-end load, it added.

During the design of the 21LC1050, space restrictions at construction sites that exist in some countries due to regulation were taken into account. That is why a highly modular counterjib was created for such model, which allows up to six different configurations according to the jib length.

The advantages of this new counterjib and its good reception in the market encouraged Comansa to apply this design to cranes 21LC660 and 21LC750, which will improve the counterjib radius of both models when they are erected with reduced jib-lengths, said the statement from Comansa.

Thus, when the 21LC750 crane is erected with a 50-metre jib, the counterjib radius is 25 m instead of 31, of the previous design (82 ft instead of 102), it stated.

As a novelty in terms of jib length, Comansa now offers an optional 90 metre radius (295.3 ft), for special applications. This option is available for the 21LC660 and 21LC750 models, as well as for the 21LC1050 crane.

Models 21LC660 and 21LC750 (except the 20t version of 21LC660) now feature a new optional hoist mechanism (132 kW - 177 hp), which allows speeds of up to 300 m per minute (984 ft/min).

Comansa also added the Effi-Plus system to the optional 110 kW hoist mechanisms (148 hp), available for all versions of such models, it added.-TradeArabia News Service