HIGH-RISE CONSTRUCTION Ӏ SECTOR REPORT
operator-adjustable crane
slewing. Together these tools allow operators to accurately control and fine-tune the crane's movements to precisely place loads. It also makes the crane suitable
for a wide range of complex lifting tasks. The control ethos extends to the
erection and dismantling process of the CTL 702-32, which has been significantly improved. Streamlined procedures include standardised pins and bolts and smart assisted
assembly solutions. Fewer tools are required and the crane is quicker to assemble and dismantle, reducing on-site time. The design optimises the use of connectors, making maintenance simpler and more efficient by reducing the number of cables and connectors that need to be managed. The crane’s main assembly is completed on the ground, further improving safety and ease of setup. “Our goal is to deliver not only cutting-edge technology but also
ELEVATING AND INNOVATING IN DUBAI
In Dubai, UAE, Raimondi Middle East has marked a region-wide milestone by deploying the highest-climbed luffing jib crane to date. A Raimondi LR213 has been operating, with a 50m jib and a tip load of 3.30t, at a remarkable height of 322m. It is constructing a 75-storey premium residential building. The confined jobsite location, coupled with intricate technical challenges and contractor requirements, demanded a precision approach for machine deployment. Tasked with replacing a previously installed crane after the building had already reached a height of 100m, the Raimondi team faced the complexity of working with a pre-existing foundation. That foundation imposed restrictions on base loads, due to the existing raft and its maximum allowable limits. Typically, crane foundations are designed based on reaction forces
provided by the crane manufacturer; in this case, Raimondi’s engineers had to reverse the process, adapting the crane’s setup to comply with predetermined limits. “To achieve this, we utilised a 6x6 base and progressively removed ballast blocks at each climbing stage, ensuring the base reaction remained within the studied allowable load limits. This adjustment was critical for maintaining stability while adhering to the site’s structural limitations,” explains Wael Hasan, general manager of Raimondi Middle East. In addition, to fulfil client requirements and project specifications,
the Raimondi Applications Department redesigned the load curve to accommodate lifting needs at a final height exceeding 300m. Structurally, the crane was assembled using GR5S mast elements, incorporating two longer 11.8m sections and 100 smaller 2.95m segments. To stabilise the crane at its towering height, 12 bracings were installed.
One of the most challenging aspects of the deployment involved collar positioning. Site-specific requirements necessitated several revisions to collar placement, each involving extensive iterative calculations and detailed adjustments. This meticulous process required significant engineering expertise and many hours of precision work. With dismantling procedures expected to commence in the coming
weeks, Raimondi Middle East’s operations team has planned the jack-down of the LR213-14t to 50m, after which the crane will be fully removed with the use of a mobile crane.
a real solution to the challenges faced by construction teams on the ground,” says Lee Maynard, global sales director, Terex Tower Cranes. “The CTL 702-32 exemplifies our dedication to providing the highest level of control, which we believe enhances safety and efficiency.” “Every feature – from the advanced slack rope system to the precision torque control and faster assembly process – has been meticulously designed with the end user in mind,” added Cosmo.
12 CRANES TODAY
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