Tandem Lifting

Luffing jib tower crane and level jib tower crane are two kinds of common models. Both models are widely used but they differ in their structure, operating principle and application field. Luffing jib tower crane is mainly used in large project and industrial equipment installing field where large lifting capacity, high perching accuracy and high safety are required for lifting large members and equipment component. Level jib tower crane is mainly used in common civil building field where fast lifting and inaccurate perching are required for lifting building materials. Both models have advantages and disadvantages in different application fields, therefore we can plan a key role in determining which model should be selected.

Brief comparison between the two models in large power station construction field
Description Luffing jib tower crane
(Large Capacity)
Level jib tower crane
(Large Capacity)
Comparison results
Luffing jib type Level jib type
Application field Widely used and it can replace level jib tower crane Relatively narrow in application field and it can not replace luffing jib tower crane Superior inferior
Laying out flexibility Good Bad Superior Inferior
Design, manufacture and manufacturing cost Complex design and manufacture and high manufacturing cost Relatively easy and low manufacturing cost Inferior Superior
Safety High Relatively low Superior Inferior
Anti-wind ability Strong Weak Superior Inferior
Perching accuracy and efficiency High Low Superior Inferior
Lifting and derricking speed Fast Slow Inferior Superior
Lifting capacity at large radius and the same moment Large Small Superior Inferior
Maximum radius at the same moment Small Large Inferior Superior
Safety and suitability of cooperative operation Strong Weak Superior Inferior
Erecting and dismantling cost Low High Superior Inferior

Luffing Jib Tower Crane
As the above comparison, luffing jib tower crane has great advantage over level jib tower crane in power station construction field, which has been confirmed by more than 100 power stations construction in china. Level jib tower crane is widely used in plant construction of power station as auxiliary tool while luffing jib tower crane definitely predominates in boiler lifting. It is not the only choice to use luffing jib tower crane for boiler lifting, which can be achieved by cooperation between large crawling crane, furnace handling crane and large level jib tower crane but also economical efficiency, safety and plane layout need to be carefully considered.

The following issues need to be carefully considered for large level jib tower crane
  • Plane layout feasible or not? Large project needs simultaneous operation of many sets of cranes as it is very important for dodging of cranes from each other and from buildings. Otherwise, it may possibly lead to very low efficiency in operation, high risk and unguaranteed time limit for a project. But luffing jib tower crane is very flexible in boom range no matter, it is in working condition or nonworking condition for conveniently dodging the other cranes and buildings in construction field while level jib tower crane can not do that either in working condition or non-working condition.

  • Are local climate especially wind frequency and wind speed suitable for using level jib tower crane? According to safety code, the slewing and brake mechanism of the crane must be released in non-working condition (i.e. free slewing condition) to ensure that the boom can freely slew with the wind for reducing wind influence to crane. Take dodging into consideration, whether the boom of the level jib tower crane is allowed to freely slew with wind or not? Luffing jib tower crane can simultaneously release slewing and brake mechanism and locate the boom in small range for the purpose of extensively reducing wind influence to the crane and avoiding collision between the boom and other cranes and buildings when freely slewing in non-working condition.

Jib Tower Crane
  • Whether the cooperative operation of two sets of crane is needed in present and future project? Owing to the economical efficiency and shortage of crane with more large specification, the cooperative operation of two sets of cranes Is adopted widely. For cooperative operation, luffing jib tower crane has great advantage while level jib tower crane is very dangerous to use for structural limitation or even unavailable for interference between the crane and the building.

  • Which country or area can your crane be used at present or in future? Level jib tower crane is prohibited in many countries and many areas. And landowners in many countries are entitled to have command of the air at limited height so that you can avoid lawsuit if you do not let your crane breach other people's sovereignty. According to the data of constructed power plant in China, most of the sites adopted luffing jib tower crane as the main lifting machinery that the customers can be benefited for scientifically choosing proper crane model.
As per the "Feasibility Study Report of Large-scale Machinery Arrangement for 1000MW Coal-fired Unit Boiler Lifting" Published on "construction mechanization" magazine, November, 2007, comparing with traditional machinery arrangement plan, the adoption of FZQ series luffing jib tower crane by Finehope (www.fhjs.net) has higher efficiency especially cooperated with auxiliary crawler crane, of which the plan can improve the economic benefits greatly by reducing the operating cost, assemble and dissemble cost and foundation treatment cost as well as engineering construction cost. Based on the large scale machinery performance condition within China, it can be concluded that the arrangement plan of adopting one FZQ1380 and one FZQ 1650 by Finehope for the boiler lifting shall spread.
Maya Xiao, Senior Analyst, Interact Analysis, gives insights on how the Forklift Market is responding to the current geopolitical and economic climate. Forklift shipment growth had plateaued to some extent

Read more ...

The largest addition to the ‘Tough Guys’ series: Liebherr is expanding its EC-B series upwards with the 520 EC-B 20 Fibre. The new flat-top crane with fibre rope and a lifting capacity of up to 20 tons was introduced at bauma Munich

Read more ...

At bauma Munich 2022, Manitowoc showcased a dozen cranes from Grove and Potain, and highlighted its expanded range of support solutions that cover monitoring, parts, service, rental, remanufacturing, finance, and

Read more ...

Spanish tower crane manufacturer Comansa presented its innovative model at Bauma Munich 2022 and its expanded range of luffing jib cranes with the launch of the LCH300, its first hydraulic model, with a maximum load capacity of 16

Read more ...

R220-10S, R90-5RE and other tower cranes tailored by Zoomlion for the European market made a debut and led a new trend at bauma Munich. The R220-10S is a flat-head tower crane based on the future-oriented digital, green, and

Read more ...

The Tadano Group has expanded its product line, enhanced the Tadano Customer Experience, contributed to community development, and advanced its business activities to protect the global environment. Using the OneTadano concept, the

Read more ...

The SBL600 gantry is the latest addition to the SBL-Super Boom Lift hydraulic gantry range. With maximum lifting height of 10.6m, the three-stage telescopic hydraulic cylinder features a foldable boom allowing transportation on standard

Read more ...

Displayed at bauma 2022, was the first battery-powered telescopic crawler crane – the 653 E Electro Battery. The new 50-ton battery-powered crane combines the benefits of battery technology with the proven advantages of the

Read more ...

PALFINGER, a leading producer and provider of innovative crane and lifting solutions, demonstrated its comprehensive digitalization competence at bauma Munich. The focus was on three key core topics: Smart Solutions, Smart Services

Read more ...

Fassi’s three solid and operational electric solutions presented at bauma Munich were the SHT and Plug-In systems, and the 'full-electric' truck-crane combination produced in collaboration with Volvo Trucks. Also, Fassi

Read more ...

The importance of understanding work equipment selected for the task in hand. Training providers can only support workers if they understand the risks involved. It’s been more than 30 years of working in the world of safety and I have seen a massive

Read more ...

Maya Xiao, Senior Analyst, Interact Analysis, gives insights on how and why the current international problems have strained the market. As with almost every industry, supply chain constraints due to Covid-19, coupled with the current geopolitical climate, have created a perfect storm for forklift manufacturers. Our new research has downgraded

Read more ...

Spanish tower crane manufacturer Comansa has expanded its range of luffing jib cranes with the launch of the LCH300, its first hydraulic model, with a maximum load capacity of 16 tons and reach of 60 metres. The tower crane manufacturer will officially showcase

Read more ...

At the Franna India Open Day, the company gave a tour to visitors of its manufacturing processes and products and shared its business plans for the Indian market. On the sidelines of the event, NBM&CW discussed with Kieran Hegarty

Read more ...

Liebherr will continue to position its cranes as high premium, value-oriented products in the rapidly evolving Indian mobile and crawler crane market, informs Subhajit Chandra, Head-Marketing, Liebherr Cranes India, while discussing the company’s marketing

Read more ...

Entrapment is a leading cause of injury and death when using MEWPs; operating equipment from the ground to position workers at height significantly increases the risks involved. Entrapment is where MEWP occupants become trapped between the controls or guardrails

Read more ...

Prime Minister Narendra Modi stepped into a specially designed elevator that took him straight to the 6.5m high National Emblem atop the new Parliament building. When he unveiled the National Emblem, India celebrated the superb sculpture - a symbol of New India

Read more ...

Enerpac has enhanced the ETR-Series Trolley System with higher capacity trolleys and swivel plates to accommodate header beams and other lifting systems. With a 50 metric ton (500kN) and now 100 metric ton (1000kN) capacity per trolley, the electrically

Read more ...

Plaksa India is providing electromechanical Screw Jacks, Electrical actuators, and Linear Chains for efficient operation of Lifting Systems used in industrial automation, defence, steel plants, renewable energy & logistic, etc. The products are manufactured

Read more ...

To remove avalanche debris, including tree trunks and rocks, the Neureiter team had to reach the Marxtenalm at 1,200 meters above sea-level in the Austrian Pinzgau. The operation involved a 3-axle »MPA« semi lowloader carrying a Liebherr R918 crawler excavator

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.
Click here to subscribe.