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CONSTRUCTION WORLD
FEBRUARY
2015
CRANAGE
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.
In January 2015 Linden Comansa
launched its new 21LC335 flat-top
tower crane, part of the LC2100
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
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
>
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.
A close-up of the MC125
crane from SA French on site
at the Echo Park, Centurion
development for client M&T
Developments.
An MCT88 crane (in the foreground) supplied
by SA French to M&T Developments in 2008 at
the Echo Park, Centurion development.
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.”
An MC205 crane
from SA French on
site at the KPMG extension
project off Empire Road in
Johannesburg for client Trencon.