Liebherr NC-B 12-70 Cranes Support Confined Residential Site in Sai Kung
30-Second Takeaway
Two Liebherr NC-B 12-70 tower cranes are handling material logistics for a residential development in Ho Chung, Sai Kung, Hong Kong. The flat-top cranes support foundation, excavation and lateral support works on a site bordered by existing homes, hills and watercourses. Each model offers a maximum lifting capacity of 12 tonnes and a maximum radius of 70 metres, with a two-tonne capacity at maximum jib length. Compact assembly arrangements and a planned dismantling operation using one 100-tonne mobile crane help address restricted site access. The current foundation and excavation works are expected to continue until the end of 2026.
Liebherr NC-B 12-70
Two Liebherr NC-B 12-70 tower cranes are supporting construction of a new residential project developed by New Orient Development Ltd in Ho Chung, Sai Kung.
Designed by P&T Architects Ltd, the development occupies Lot No. 2195 in D.D. 244. Foundation, excavation and lateral support works began in December 2024, with the two cranes maintaining the movement of construction materials across the confined working area.
The location requires attention to neighbouring residential buildings and consistent noise control throughout the construction phase.
Twelve-Tonne Capacity and 70-Metre Reach
The NC-B 12-70 has a maximum lifting capacity of 12 tonnes and a maximum working radius of 70 metres. At maximum jib length, its tip capacity is 2,000 kilograms.
The model offers a freestanding hook height of up to 76.9 metres, depending on the tower configuration. These figures describe the crane’s available capabilities rather than the confirmed operating dimensions of the two machines at Ho Chung.
Its flat-top design eliminates the conventional A-frame above the jib, reducing the height of the crane head. On a restricted site, this provides a more compact upper structure while retaining the reach needed to distribute materials across the working area.
Container Transport and Modular Jib Assembly
The NC-B 12-70’s slewing assembly and 70-metre jib can be transported using standard-sized containers.
Liebherr’s LiConnect quick connection system allows the jib to be assembled in five-metre sections. This modular arrangement supports erection planning where delivery access, component storage and assembly space must be carefully managed.
At Ho Chung, the cranes lift general construction materials throughout the foundation and excavation phase. Their role is to keep materials moving between delivery, storage and working positions as the groundworks progress.
Dismantling Planned Around Restricted Access
Removing the tower cranes after their work is complete was an important consideration in the project’s equipment planning.
Both NC-B 12-70 cranes are scheduled to be dismantled using a single 100-tonne mobile crane. The mobile crane will handle the dismantling of each tower crane, rather than removing both simultaneously.
The planned approach is intended to shorten the dismantling period and reduce the equipment and logistical demands at the end of the construction phase. That is particularly relevant on a site bordered by occupied residential properties.
Construction Within an Established Neighbourhood
Phase one covers a site area of 7,102 square metres and comprises 26 houses of up to three storeys, plus one basement level. The total gross floor area is up to 5,262 square metres.
Existing homes, nearby hills and watercourses influence how the construction team organises equipment, deliveries and material handling. The crane arrangement addresses these physical restrictions, while noise control remains a requirement of the wider site operation.
The foundation, excavation and soil nailing works are expected to continue until the end of 2026. This schedule relates to the current works phase, rather than completion of the entire residential development.
About Liebherr
Liebherr is a family-owned technology and equipment manufacturer founded by Hans Liebherr in 1949 in Kirchdorf an der Iller, Germany. Its lifting portfolio includes tower cranes, mobile and crawler cranes, maritime cranes and mobile construction cranes.
The Tower Cranes division manufactures fast-erecting, top-slewing, flat-top, luffing jib and special-purpose cranes for construction projects worldwide. Its range supports applications from residential developments to major infrastructure and complex urban construction.
The equipment portfolio is complemented by Tower Crane Solutions, the Tower Crane Center and Tower Crane Customer Service, providing project support, equipment resources and technical assistance.
Within this range, the NC-B series offers flat-top tower cranes with modular transport and assembly arrangements. The NC-B 12-70 combines a 12-tonne maximum capacity with a 70-metre radius, providing material handling capability for projects such as the Ho Chung development.
Official website: www.liebherr.com
Frequently Asked Questions
Where are the two Liebherr NC-B 12-70 cranes working?
They are operating at a residential development in Ho Chung, Sai Kung, Hong Kong.
What is the model’s lifting capacity?
Maximum lifting capacity is 12 tonnes, with a two-tonne capacity at the maximum 70-metre jib length.
Why is the flat-top design useful on this site?
Removing the conventional tower-head A-frame reduces the crane’s upper profile, supporting equipment planning in a restricted construction environment.
How will the cranes be dismantled?
The project plans to use one 100-tonne mobile crane to dismantle the two tower cranes.
When are the current works expected to finish?
The foundation, excavation and soil nailing works are expected to continue until the end of 2026. This is not the completion date for the entire development.
