Tower Crane

Tower cranes are versatile lifting equipment that have proven their utilities in lifting material for housing and real estate projects. Of late, the equipment have been making their mark in core construction jobs in the country. However, to derive the optimum utilization of the equipment, necessary precautions need to be taken during their erection, operation, and maintenance. Partha Pratim Basistha finds the details.

Tower cranes, like never before, have been making their mark in India's construction landscape. As construction job complexities gain further ground in the country, both in high end and real estate construction, enhanced recognition and acceptance of these steel structures is becoming an accepted norm among the construction fraternity. However, as population of these wonderful lifting equipment swell, requisite yardsticks are required to be adhered to by contractors for efficient and safe operation of tower cranes. This is essential to check escalation of equipment downtime.

Tower Crane
Essentially characterized as a structure of steel, (Steel constitutes 80% of tower crane's components) the equipment require precautions both during erection and dismantling, most importantly during slewing operations. "Since equipment works in a static position lifting different load variants, foremost care has to be exercised during equipment's erection", says Mr. Ashwani Mattoo, National Sales Manager, M a n i t o w o c Cranes and Potain Tower Cranes, India. According to Mr. Mattoo, "it is quite essential that soil is tested to identify ground bearing strength at the site of erection. This in turn will provide stable foundation for crane to be erected."

He adds, "with appropriate foundation in place, it is important that foundation is uniformly leveled. This will prevent crane from collapsing during lifting of higher loads. Dually, right foundation will check any anomalies in alignment of crane during its positioning and operation." Significant would be to firmly place four corners of mast section over foundation.

Similar views are expressed by Mr. V.N. Deshpande, Vice President-Business Development, Spartan Engineering Industries Pvt. Ltd.

Tower Crane
Main erection has to be carefully followed by approp-riate joining of mast sections. According to Mr. Nilesh Savant, Service Engineer, Tower Crane, Liebherr India Pvt. Ltd., "while jointing nuts and bolts of mast section, torque has to be given as per prescribed specifications. It is vital to see the capacity of bolts."

Second vital stage of erection is identifying right anchorage point to pillars of construction. This ideally has to be done when crane has to be extended above its free standing height. Identification of correct anchorage point needs to be done through calculations and the calculations have to be done considering height and pillar that could be ideal for anchorage. Selection of appropriate anchorage is important so that crane jib can cover a good part of construction site at a given height. Furthermore, anchoring support has to be quite strong.

Vital: Area Feasibility

Nonetheless, the most significant part to be preceded before erection and commissioning of tower cranes, would be a thorough study involving feasibility of the area where tower crane has to erected and perform. While soil testing and zero level foundation are of value. It comes under the ambit of feasible study. Other domain of study would be whether job site has got comfortable space to assemble and dismantle cranes. Road access to site has to be seen, if not available then it needs to be constructed. This is because erection and dismantling of tower cranes are supported by the aid of mobile cranes that has to be transported to the job site or its near vicinity by self or through a separate vehicular transportation arrangement. Having a well connected site access for supporting cranes would also help in any condition to have economies of scale for construction project.

Availability of adequate space is also important. This is because, mobile cranes involved in assembling would, in obvious sense, be randomly lifting mast sections and assembling those at different heights through its boom at different extensions. Care has to be taken about the close proximity of buildings or any other construction projects at assembly site because mobile crane boom has to undertake slewing.

Tower Crane
Presence of building's proximity to construction job site is also vital. This is so as to prevent jib of tower cranes from colliding with the same during slewing. In case of presence of other buildings or close proximity to other construction projects, at the same job site, it would be necessary to place jib at great heights to support safe slewing of tower cranes. Right working space availability is also very significant for smooth internal and external working of tower cranes. But above all, it would once again lead to smooth erection and dismantling of crane without any obstruction.

Placing equipment in right position by making height adjustments is essential to prevent crane counterweight being obstructed during slewing. Moreover, right equipment positioning through placing jib of crane 2-3 meters away, as per conventional standard, can also prevent jib collisions. This is where multiple tower cranes are functioning at same job site. Collision can be prevented by deploying tower cranes having luffing jib arrangement etc.

However, element of outmost value, as most tower crane equipment manufacturers and distributors agree would be, selection of a right, skillful and fearless operator. This is because he has to perform at critical heights. This is precisely in high end projects.

Maintaining Safety Standards

Operation has to be closely guided by adhering to right safety standards. One of the most important of these safety standards is the wind velocity in project vicinity. According to Mr. S. K Malvi, Director Technical, Anupam Industries Limited, "it is much essential for the contractor to evaluate the wind velocity before erecting the tower crane at the job site. This is essential as pressure due to high wind speed may lead the tower crane to derail or collapse." As per Mr. Malvi, "as a part of service support for erection of the tower crane we provide due advice to the contractor in evaluating the wind speed during erection and operation of the tower crane." Anupam Industries manufactures tower cranes bearing a capacity of 5 tons and 6 tons in technical collaboration with Alfa SRL of Italy. The cranes are available with top‎less features and cathead features.

Tower Crane
Wind pressure in tower cranes is determined with anemometers where a crane operator can read wind velocity. Cranes are safe to operate in wind velocities of up to 40 kmph. Program Logic Control Devices assist in automatically shutting down crane when wind velocity is exceeded.

Additionally, proper maintenance of rail track on which tower crane is working in infrastructure projects has to be ensured. It is important to use proper rails for movement of the tower cranes. Rails should be absolutely parallel and well bedded down on a solid base. Tracks should be earthed. It should be straight to prevent derailment of tower cranes at job site. However, construction companies opine that there has to be safety regulation in place which should be effectively implemented, all which would lead to hazard free use of tower cranes in infrastructure projects. Significantly, overloading should not be allowed under any circumstances as majority of accidents in tower crane occur due to lack of information on loading or intentional overloading. Besides, uninterrupted power supply has to be ensured to crane for its consistent performance. Further, plumb line has to be perpendicular as slightest deviation from the same would render the working output inaccurate.

Customer Support Galore

Responding to requirement for smooth erection, commissioning and dismantling of tower cranes equipment manufacturers and distributors in India are offering an array of services to contractors. According to Mr. Ashwani Mattoo, "For our tower cranes, Manitowoc Crane Care, provides Manitowoc's comprehensive support program. This includes Expert Field Service, Prompt Parts Availability, Technical Support, Classroom, On site Training Program, and so on."

He adds, "most of service engineers of Manitowoc Crane Care are well experienced and trained to work on tower cranes to perform jobs like erection, maintenance, operation and troubleshooting with proper safety procedures. Additionally, we have got a training department which keeps evaluating training requirements of technicians and providing necessary training for them to upgrade their knowledge and skills. Further, we also offer training to customer's technical staff so that they can understand basic functioning of Cranes and can rectify smaller problems themselves to increase productivity and reduce downtime."

Manitowoc Crane Care has offered services to cranes working in hydro Power projects, cement plants, cooling towers, Bridges in India (such as the Bombay – Worli Sea Link Project), and construction of highrise buildings. Manitowoc Crane Care has three service stations in north, west and South India to provide customer service promptly.

Tower Crane
Escorts Construction Equipment Ltd. also offers c o m p r e h e n s i v e customer services. According to Mr. Sheetal Malik, DGM Sales, Escorts Construction Equipment Ltd. (ECEL), "we have a dedicated core team to support erection and commissioning of tower cranes in India. The Core team with highly experienced associates in tower cranes provide training to dealers for smooth erection, commissioning of tower cranes. Further, Core team also provides direct training to customers as per requirement. Service support is complemented through component availability through our pan-India dealership network." ECEL distributes Chinese manufactured Wei-Huata tower cranes in India.

Adequate customer support is offered by Liebherr India Pvt. Ltd. According to Mr. Pulok Gupta, Managing Director and Head of Sales, Liebherr India "our service support is benchmarked on prompt availability of service engineers within 24 hours of customer call. This ensures 99% of crane availability. Apart from providing on field service, our service engineers are competent enough to guide customers to undertake trouble shooting operation of cranes over phone itself."

Tower Crane
He informs, "to provide component and spares availability at right time, we follow a concept of "networking of service" i.e. we keep pooled some amount of critical components with our customers. Based on the demand, we source and transfer required components from one customer to other. Followed by equipment off take, we replenish component stock from sourcing customer from our mother warehouse in Navi Mumbai. This practice is followed in chains between our customer network."

Tower Crane
Well trained service engineer support is provided by ABG Cranes. According to Mr. R.B. Pandey, General Manager, Marketing, ABG Cranes Ltd, "customer support is key to us. We have well trained team of 20 service engineers to provide complete technical guidance from erection, to commissioning and dismantling of tower cranes. The engineers are available at a call of 24 hours." Mr. Pandey states, "Service engineers would be enhanced with population of tower cranes rising in near future. ABG Cranes market Chinese manufactured Yangmao cranes in India.

Tower Crane
Well placed service backup is also vital says Spartan Engineering. According to Mr. Deshpande, Vice- President Business Development, "we provide end to end service for tower cranes being supplied by us. While supplying a tower crane, we undertake a total contract, from providing technical support to erection, commissioning and dismantling, preceded by site inspections by our service engineers. This provides us an edge over our competitors. Besides, we are well placed in offering thorough component support to our customers." Spartan distributes GJJ and SQCL Chinese manufactured tower cranes in India."

Tower Crane
Though service back up are available for operation and maintenance of tower cranes in the country. There has to be a sustained information exchange between manufacturers and users of tower cranes. It would be more beneficial if the operators use their own discretion for safe usage of cranes. This will lead to usage of tower cranes in construction projects across the value chain. Not to mention their increased usage for the time to come.
Key Handover Ceremony of First Franna Crane in Delhi by Alpha Services
Alpha Services, the authorized sales and service dealer for Terex Franna cranes in NCR, handed over the first Franna FR17 crane in Delhi to a leading crane hiring company, Shree Ganpati Cranes, Ghevra, Delhi. Owner Krishan Kumar expressed

Read more ...

Vita Industrial’s load stabilization technology to increase efficiency and profitability of crane companies
Vita Industrial’s Load Navigator uses a powerful system of sensors and air thrusters to automatically stabilize loads. The Navigator will be matched head-to-head against taglines, showing how load stabilization can increase

Read more ...

Manitowoc’s total lifting solutions aimed at serving the infrastructure, alternative energy, and industrial end markets
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 more. The new technologies

Read more ...

Forklift Market: Long Term Growth Trajectory Remains Positive
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 ...

Liebherr Showcases First Flat-Top Crane & Luffing Jib Crane with Fibre Rope Technology
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 ...

Manitowoc’s total lifting solutions aimed at serving the infrastructure, alternative energy, and industrial end markets
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 ...

Comansa presents New LCH300 hydraulic luffing jib crane and Crane Mates– a novel digital solution for fleet management
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 ...

Zoomlion R-generation Tower Cranes and Green Forklift debut
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 ...

TADANO New Crane Models, Technologies, and Solutions
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 ...

Enerpac introduces new hydraulic gantry system SBL600
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 ...

Sennebogen machinery is reliable with the latest safety and environmental standards
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’s Pioneering Solutions
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 Presents 3 Electric Solutions
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 ...

Bridging the Gap
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 ...

Geopolitical Climate Creates Perfect Storm for Forklift Manufacturers
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 ...

Comansa to Present New LCH300 Hydraulic Luffing Jib Crane at Bauma Munich 2022
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 ...

Franna Hosts Open Day at Hosur Facility; Showcases FR 17 Pick-n-Carry Cranes and a new prototype for Indian Market
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 Cranes Promise Total Cost of Ownership
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 ...

Safety at Height - Grounds for Concern
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 ...

Spartan installs Special Elevator to reach the new National Emblem atop the Parliament Building
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 ...

×
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.