- Available in 10 t and 12 t versions, the crane is easy to erect, dismantle and transport.
- Capacities at the end of the 70 m jib are an impressive 2.3 t for the 10 t version and 2.2 t for the 12 t version.
- The crane supports the increasing need for stronger, faster cranes for precast concrete construction projects.
Manitowoc’s product development under The Manitowoc Way continues to accelerate, with the Potain MCT 275 the latest new launch from the company. The unit further expands its popular MCT range of topless cranes built in China. As with other cranes in the range, the MCT 275 delivers easier transport and assembly, plus high efficiency and reliability on construction projects. To respect social distancing, the company unveiled the crane during a virtual launch event at Manitowoc’s factory in Zhangjiagang, China on July 29, where the 10 t version of the MCT 275 was displayed with its full 70 m jib. This new model has taken advantage of the advances and innovation Manitowoc made with the introduction of the MCT 325 and was largely been inspired by it.
“With the increasing popularity of precast concrete construction, topless cranes like the MCT 275 are becoming the go-to solution for the speed and simplicity they bring to job sites,” said Kwong-Joon Leong, regional product manager – Tower Cranes, Manitowoc. “The topless design allows multiple units to overlap on site and with the MCT 275 we’re giving customers a new choice in the 10 t and 12 t range. With its standout 70 m jib, we believe this crane will appeal to a wide range of companies and projects.”
Available in two versions, the MCT 275 offers jib length configurations from 30 m up to an impressive 70 m, in increments of 5 m. At its 70 m jib end, the MCT 275 can handle 2.3 t for the 10 t version and 2.2 t for the 12 t version, making it one of the best-in-class performers for long-distance lifting.
On a well-prepared site, the MCT 275 can be setup within 1.5 days, with the full jib and counter-jib erected in four lifts. The complete upper part of the crane can be transported in six containers.
The MCT 275 is designed to work with the 2 m x 2 m L68 mast systems and can be utilized with fixing angles on a regular high-rise construction project. Users can also assemble the crane in an internal climbing configuration or mounted on a chassis, for maximum versatility.
As with all Potain cranes, customers have a variety of options for the hoisting, slewing and trolley mechanisms. The 10 t version offers the 60 LVF25 as standard and the 75 HPL25 as option, while the 12 t version offers the 75 LVFC30 as standard and the 75 HPL30 as options. The 60 LVF 25 is a 45 kW-rated hoist that offers a rope capacity of 500 m and can lift 2.5 t at up to 88 m/min. The 75 HPL25 is a 55 kW-rated hoist that offers a rope capacity of 834 m and can lift 0.35 t at up to 215 m/min. The 75 LVFC30 is a 55 kW-rated hoist that offers a rope capacity of 766 m and can lift 1.5 t at up to 114 m/min. The 75 HPL30 is a55 kW-rated hoist that offers a rope capacity of 845 m and can lift 0.2 t at up to 220 m/min.
In 2014, Manitowoc launched its first Potain topless crane from the Zhangjiagang factory, the MCT 385. Over the years the company has continued to innovate and added the MCT 205, MCT 85, MCT 325, MCT 565 and now the MCT 275 to complement the range. The MCT 275 will ultimately replace the MC 235 model, a long-serving and popular hammerhead top-slewing crane with a proven history of customer satisfaction.
To learn more about the Potain MCT 275 click, here.
With higher buildings the order of the day, Potain tower cranes can be specially configured for better standing height.
According to Louw Smit, sales director at Crane & Hoist Equipment SA, this allows the hook height to be raised without the added cost of anchoring or jacking. The company is the southern African dealer for Potain cranes.
“Configuring the mast makes the crane more suitable for the high-rise structures that are popular in today’s construction sector,” says Smit. “It adds to the freestanding height of the tower crane itself, without the need to tie the crane onto the building. This saves time and money, as anchoring and jacking are expensive.”
He highlights, however, that the special configuration option needs a high level of expertise and experience.
“It is vital that contractors partner with technical tower crane experts like Crane & Hoist Equipment SA, who have in-depth knowledge of tower cranes configurations,” he says.
The process can be implemented by starting with bigger mast sections and then adapting to the normal mast size – giving a better hook height. This differs from the standard configuration available on the crane’s specification sheet, and offers greater flexibility at reduced expense to the customer.
Crane & Hoist Equipment SA deals in both rental and sales of Potain tower cranes. Its own rental fleet comprises eight top-slewing cranes and one bottom-slewing crane.
“Our rental fleet is well-suited to meet the needs of small and medium-sized projects, where lifting capacity of between 5 tonnes and 8 tonnes is required, with jib lengths of 50 metres to 60 metres,” Smit concludes.
- Since 2014 a total of seven Potain cranes have been working on one of the world’s largest nuclear fusion reactor construction sites – the ITER project in the south of France.
- Contractor Dodin Campenon Bernard, part of VINCI Construction, says the expertise provided by Potain has ensured efficiency and productivity throughout the life of the
- The cranes will be progressively dismantled by January 2021.
Since the first concrete pouring at the end of 2014, a total of seven Potain cranes have successfully completed the civil engineering and concreting works for the new generation ITER nuclear power plant.
After the acquisition of the six cranes in 2014 by contractor Dodin Campenon Bernard, part of VINCI Construction, several new cranes were gradually installed on the site for work annexed to the construction of the reactor, or for concrete work on all of the one hundred buildings now present on the site.
After disassembling the MDT 308 crane last September from the center of the bioshield for the reactor containment, and the MD 175 on the park for the civil works and the framework of the main building, the second phase of construction began, including the finishing work.
The MDT 389 joined the fleet to manage the park logistics.
It is on this second phase that the Potain cranes and new machines have begun the last stages of construction. Today, four cranes are still constructing the buildings around the reactor – an MD 610, MD 485, MD 560 and an MDT 368.
The cranes have worked for five years pouring the concrete that will be necessary to contain the reactor, as well as assembling more than one million components, lifting steel profiles that range from 50 mm to 250 mm thick. These will house the systems necessary for the operation of the ITER Tokamak device, where nuclear energy will be produced.
Since the concrete pouring ended, the cranes on site have been used to install the metal structures of the buildings. The main seven-story concrete building will be 120 m long and 80 m wide. There will also be 16,000 t of rebar, 150,000 m3 of concrete and 7,500 t of steel in the structure.
MDT 389 joins the fleet
Most recently, an MDT 389 equipped with Manitowoc’s CCS control system joined the fleet of Potain cranes already on site. The crane was installed on a 96 m rail to manage the reinforcement and formwork fleet, with logistical support for concreting.
“We chose the largest of the Potain topless cranes in 2016, the MDT 389, for its lifting capacity of 16 t., , We installed the crane on an additional production station measuring 10,000 m2 to speed up the production of the necessary reinforcement and the logistics of the formwork on site. Still in place, it continues the mission in an area outside the site,” said Laurent Moustraire, material director for Dodin Campenon Bernard.
Since 2014, only Potain cranes have been used in the construction of the ITER site. Of the seven tower cranes in use, whether bought or rented, the primary challenge has remained the same — ensuring the reliability and performance of the machines. For the contractors dedicated to the construction of this new generation nuclear fusion reactor, the Potain cranes were a strategic choice.
Outstanding service and engineering support
Beyond the confidence in the Potain cranes, recognized for over 90 years, Manitowoc Crane Care services have brought an essential advantage to the contractors with comprehensive and advanced service and support since the start of construction.
Thanks to the dedicated teams of the Vitrolles service agency, contractors have 24/7/365 access to parts as well as operations by technicians for troubleshooting when problems arise, putting the cranes back into service as quickly as possible.
The value of Manitowoc Crane Care was justified very quickly when it became known that the project to construct a nuclear fusion reactor for ITER in the south of France will cost nearly €18 billion. It was also important to the contractor to benefit from reliable engineering expertise, ensuring the cranes were optimally installed and the lifting solutions were adapted for each task.
“What we also particularly appreciated throughout the project was the technical expertise provided by the Potain engineering teams,” Moustraire said. “Whether it was the study to place the MDT 308 in the center of the Tokamak on the raft, or to find anchoring solutions for the MD 560 and MD 485, which were on foundations overlapping galleries, each time the Dardilly Lift Solutions teams found technical solutions, and even anticipated constraints that we had not envisioned.
“It is very appreciated on a complex site that cannot afford unpleasant surprises. In general, the attention paid to our needs throughout the process, from the definition of the cranes to their assembly, and the expertise and flexibility shown by Manitowoc made our lives easy. This strengthened our confidence throughout the duration of this project.”
The ITER project started more than 10 years ago, and the concrete construction that began in 2015 with the installation of the first cranes, is designed to demonstrate the production of large-scale electrical energy. Ultimately, this installation, made up of one hundred buildings covering an area of 42 ha, should become the largest energy research project in the world. The remaining cranes on site will be phased out by January 2021.
With our compliments a quick 20 point daily checklist for safe tower crane operations.