Construction World February 2015

CRANAGE

An MCT88 crane (in the foreground) supplied by SA French to M&T Developments in 2008 at the Echo Park, Centurion development.

An MC205 crane from SA French on

site at the KPMG extension project off Empire Road in Johannesburg for client Trencon.

still many suitable lifting applications where tower cranes are not being utilised. This is not to say that a tower crane is necessarily supe- rior to a mobile crane, as each has its specific market sectors. However, we do distinctly see that tower cranes are being under utilised in general industrial applications.”

A close-up of the MC125 crane from SA French on site at the Echo Park, Centurion development for client M&T Developments.

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NEW FLAT-TOP CRANE The improvements made following the revision of the successful 21LC290 resulted in a new tower crane model with an optimised load diagram.

and shorten the assembly sequence of the 21LC335 in comparison to the 21LC290. The 21LC335 crane comes standard with a Effi-Plus high speed hoist mechanism that reaches speeds of up to 150 metres per minute, although there are other optional engines that can reach 228 metres per minute. Like the rest of Linden Comansa’s flat-top cranes, this new model includes the PowerLift system, that allows to improve the load diagram up to 10% with reduced speeds.

In January 2015 Linden Comansa launched its new 21LC335 flat-top tower crane, part of the LC2100

jib and counterjib sections are also the same as its predecessor. There have been modifi- cations only on the cat head and the upper turntable, allowing customers who would like to convert their 21LC290 into a 21LC335 to do it by replacing these two elements and modi- fying the configuration of the counterweights. These changes have also allowed to simplify

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series. This new tower crane is the result of the review of the 21LC290, a model that Linden Comansa successfully produced since 2002, and which will be replaced by the 21LC335. Both cranes feature similar characteristics in terms of range (up to 74 m), maximum freestanding height (64,5 m) and versions depending on the maximum load capacity (12 and 18 t). The changes made as a result of this review have led to an important increase of load capacity with maximum reaches under 70 m. For example, the 21LC290 18 t with a 50 metre jib can load 5 300 kg at the end of the jib, while the new 21LC335 18 t with same jib length loads up to 6 600 kg – almost 25% more. With this same 50 metre jib configuration, the 21LC290 moved the maximum load of 18 tons up to 16,3 metres), while the 21LC335 moves the maximum load up to 19,6 metres, 20% more. The tower sections of the 21LC335 are the S25, the same as the 21LC290, and the

CONSTRUCTION WORLD FEBRUARY 2015