Große Turmdrehkrane

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kroll advertising document

reach_from_the_skies_1_.pdf

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http://www.kranengel.de/geschichte2.htm#

a site about history of cranes

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http://sk-kranmash.ru/production/bashennye...-ogolovkom.html


Yangmao from China has plans for realy big tower cranes up to 10.000tm. They folllow the pattern of well-known european models from kroll, liebherr, potain.

Anyway, ST10.000 seems very impressive- 10x10m tower mast and 117m HUH. Total height is likely more than 150m (the crane follow the design of kroll k10.000 wich has 86m HUH, but 124 m height of 8x8 m mast)
Many thanks to Mr. Heinz Gert Kessel for this website.

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A short article about tower cranes history:
Steady as
she goes
The tower crane market has suffered more than
most over the past two years, but is finally showing
some signs of life as high rise construction begins
to pick-up some pace in many countries. As the
tower crane approaches 100 years of development,
we look at the slow but steady progress over the
years and at a few more radical developments -
some of which caught on and some which have not -
rounded off with a look of some new products and
interesting applications.
Tower crane development in
recent years has been more
evolutionary than revolutionary.
The last really big - practical -
idea to hit the mainstream market
was probably the advent of the
‘flat top’ or ‘topless’ tower crane,
which in recent years has
replaced many small to middle
range classic saddle jib cranes.
The flat top’s main advantages
are faster, easier erection due to
the elimination of the top mast
and pendants and lower overall
height above the hook. Although
the height difference is not quite
as great as many would have
you believe, for critical overhead
height applications such as
airport work every centimetre is
critical so shaving a metre or
two from the total height is
much appreciated.
However even this development
has been more of a trend than a
radical breakthrough. German
company Ridinger of Mannheim
had ‘the high house crane’ which
used a pole-type tower and what
was essentially a flat top design as
early as 1958. SGME used a flat top
design with a combined sliding
jib/back jib, but it was Linden that
took it mainstream with its 8000
model in the 1970’s. This was later
copied and developed by others
helping the concept really gather
pace over the past 10 years or so.
Development of the modern tower
crane has been a slow-burn affair
throughout its 100 year history,
although Wolffkran, with some
justification, will claim that the
100th anniversary celebrations are
not due until 2013. The first tower
cranes – luffing jib cranes -
emerged from companies such as
Morris and Bastert in 1910 and
Julius Wolff in 1913. The Morris
crane was more of a development
of the traditional building cranes in
use at the time, which used a
heavy-duty scaffold tower with a
davit jib fitted to the top to raise
stone blocks and other building
materials on the large public
buildings going up at the time.
The Wolff on the other hand, was
far closer in design and concept
to a modern bottom slewing
tower crane.
It would seem that the tower crane
has been a critical tool for building
contractors for at least 50 years and
as such it is not something they are
prepared to risk ‘messing with’ by
adopting changes or developments
that are too radical. Hence the slow
but steady improvement rather than
the step changes we have seen in
the mobile crane world over the
years. So while the modern tower
crane is a completely different
animal from those built just 20
years ago, its basic design concept
has hardly changed at all, perhaps
because the original concept was
right in the beginning. It also
explains how 25 and 30 year old
units are still accepted on many
high-profile job sites.

A detailed history of tower cranes with its milestones can be found on Mr. Pius Meyer website here:

http://www.kran-info.ch/chronologie.pdf

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http://www.towercranesupport.com/kroll%20k1800.php

a site about new kroll k18000