{"id":5007,"date":"2016-07-15T15:11:09","date_gmt":"2016-07-15T15:11:09","guid":{"rendered":"http:\/\/minutes.machine.market\/?p=5007"},"modified":"2016-07-15T15:11:09","modified_gmt":"2016-07-15T15:11:09","slug":"sarens-employs-two-demag-ac-700-cranes-for-an-impressive-heavy-tandem-lift","status":"publish","type":"post","link":"https:\/\/machine.market\/blog\/sarens-employs-two-demag-ac-700-cranes-for-an-impressive-heavy-tandem-lift\/","title":{"rendered":"Sarens employs two Demag AC 700 cranes for an impressive heavy tandem lift"},"content":{"rendered":"

Recently, international steel construction company, Iemants<\/a>, constructed an offshore oil module for Fabricom<\/a> at the company\u2019s Hoboken facility in Antwerp, Belgium. These massive modules, critical for the oil and gas production process, range in sizes reaching 25 m high, 30 m wide and 40 m long and weigh up to 2,200 tonnes. Even with a full complement of equipment at Iemants\u2019 disposal, occasionally during module construction it is necessary to bring in heavy lifting specialists to safely pick especially heavy pieces and place them on to the module platform.<\/p>\n

When the time came to lift and mount on top of the module a large spreader bar used to perform offshore lifting, Iemants worked with its lifting partner, The Sarens Group<\/a>, to develop the most cost-effective and efficient lifting solution.<\/p>\n

The Right Cranes<\/p>\n

The spreader bar measured 13.5 m long, 5 m wide, and 6 m high and weighed 145 t. It had to be lifted from ground level to a placement height of 32 m, and the crane would have to work at a maximum 24-m radius during the lift. \u201cWe considered a number of options from using a single crawler crane to performing a tandem lift using two all terrain cranes,\u201d says Erik Van der Elst, Key Account Manager for Sarens.<\/p>\n

The advantage of the single crane option would have been that it required only one crane and crew to be mobilized. However, a crawler crane would require multiple days and more than 20 loads to transport the crane components necessary to configure it to meet 145-t lift capacity at a 24-m radius. \u201cIt would need at least 10 days to complete the entire project from mobilization to completing the lift with the single crane option,\u201d says Van der Elst. This was too long and costly for the module lift project.<\/p>\n

Sarens\u2019 project managers focused on a more efficient, dual crane option, using the 700-t capacity class Terex AC 700<\/a> all terrain crane. To meet required lifting capacity and working radius, while minimizing loads to improve mobilization efficiency, planners went with a 20.5-m main boom option, using a 4-m variable adapter to connect the 30-m luffing fly jib to the telescopic boom. \u201cIn this configuration, each AC 700 crane offers 86.5 t capacity at the 24 m radius, ample capacity to safely lift the 145-t spreader bar,\u201d says Michael Klein, Product Marketing Manager for Terex and Demag All Terrain Cranes.<\/p>\n

Even though this option required two cranes to be mobilized, it offered significant time and money savings. The nine-axle AC 700 all terrain crane is quickly driven to the jobsite with its complete 60-m main telescoping boom installed, while meeting 12-tonne per-axle load limits to reduce the number of loads required for transport.<\/p>\n

Even using the two cranes, this option would cut the number of loads approximately in half compared to mobilizing a crawler crane. \u201cWe calculated a week\u2019s time savings by using the two Terex all terrain cranes, which represented significant labor and cost savings for our customer,\u201d explains Van der Elst. This is critical for the construction of an oil module in a depressed oil price market.<\/p>\n

Tandem Savings<\/p>\n

Sarens mobilized its first Terex AC 700 crane from its Wolvertem, Belgium headquarters plus eight trailers of supporting material, jib segments and counterweight to make the 27-km trip to the Hoboken jobsite. The large but nimble Terex crane reaches highway speeds of 75 km\/h to quickly get from the yard to the project, and, once on site, its 8-axle steering allows the crane to quickly maneuver into position for lifting. Within a day, Sarens\u2019 four-person work crew transported the first all terrain crane to the jobsite, rigged it with 160 t of counterweight and the 30-m luffing fly jib, and had it ready for the lifting project.<\/p>\n

On day two, the crane went to work lifting and positioning supporting equipment in preparation for placement of the spreader bar. \u201cThe first crane on site placed the lifting supports, rigging for the platform and a radar mast,\u201d mentions Van der Elst. \u201cAt the same time, we moved our second crane to the jobsite and had a different four-person crew prepare and position that AC 700 for the spreader bar lift.\u201d<\/p>\n

The morning of day three both cranes were in position for completing the critical lift. To avoid the potential of weight overload on one of the cranes, Sarens\u2019 lift plan included positioning a 160-t capacity swivel beam in between the spreader bar and cranes\u2019 hook blocks. \u201cThis provided perfect weight distribution of the load between the two cranes,\u201d says Van der Elst.<\/p>\n

To start the spreader bar lift, the two crane booms worked at a 22-m radius, and, as the lift progressed, the boom radius decreased to 17 m as the two cranes swiveled the load into position. While placing the spreader bar atop the module, both cranes were operating at a 24-m radius, and the two booms were less than a couple of meters apart. \u201cThe responsive controls of the AC 700 cranes give our operators very precise movements of the boom and load, which allows us to confidently complete intricate tandem lifts like this,\u201d offers Van der Elst.<\/p>\n

With the lift complete, both four-person crews derigged their respective AC 700 cranes, and the lifting equipment convoy traveled back to Sarens\u2019 Wolvertem yard. In just three days, the dual crane option safely and efficiently placed the spreader bar plus supporting equipment onto the oil module, seven days faster than what was estimated for the single crane option. More importantly, going with a tandem approach saved Sarens\u2019 customer money.<\/p>\n

About The Sarens Group<\/strong><\/p>\n

The Sarens Group, with its Belgium-based head office (Wolvertem), has been providing heavy lift, engineered transport and specialized rigging services for more than 60 years. With state-of-the-art design tools and one of the world\u2019s largest inventories of cranes, transporters and specialty rigging equipment, along with a team of highly skilled professionals, the Sarens Group is an international market leader in its field. Employing more than 4,200 dedicated employees who embody the spirit of the company\u2019s motto, \u201cNothing too heavy, Nothing too high,\u201d the Sarens Group is well prepared to support its customers\u2019 heavy lift, engineered transport and specialized transport requirements around the globe and across every market sector.<\/p>\n","protected":false},"excerpt":{"rendered":"

Recently, international steel construction company, Iemants, constructed an offshore oil module for Fabricom at the company\u2019s Hoboken facility in Antwerp, Belgium. These massive modules, critical for the oil and gas production process, range in sizes reaching 25 m high, 30 m wide and 40 m long and weigh up to 2,200 tonnes. Even with a […]<\/p>\n","protected":false},"author":1,"featured_media":5008,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":""},"categories":[3,8],"tags":[1319,1509],"yoast_head":"\nSarens employs two Demag AC 700 cranes for an impressive heavy tandem lift - MachineMarket Blog<\/title>\n<meta name=\"robots\" content=\"index, follow\" \/>\n<meta name=\"googlebot\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta name=\"bingbot\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cranemarket.com\/blog\/sarens-employs-two-demag-ac-700-cranes-for-an-impressive-heavy-tandem-lift\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sarens employs two Demag AC 700 cranes for an impressive heavy tandem lift - MachineMarket Blog\" \/>\n<meta property=\"og:description\" content=\"Recently, international steel construction company, Iemants, constructed an offshore oil module for Fabricom at the company\u2019s Hoboken facility in Antwerp, Belgium. 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