DIGITAL ASSET DELIVERY
Lifting Schedule Optimisation
for Tower Cranes
How might we optimise the lifting schedule for the tower cranes for seamless operations and better productivity?
Challenge Statement Owner
Background and Current Practice
Tower cranes are heavily deployed on large-scale construction sites to lift construction materials. The efficiency of the tower crane usage largely depends on the ability of the site management and lifting supervisors to plan the lifting schedule and coordinate lifting works.
Ideally, the lifting schedule should consider the various trades and subcontractors on-site and be optimised based on key factors, such as the urgency of work, delivery of materials, and availability of work areas.
Currently, lifting supervisors decide on what needs to be prioritised or delayed.
This decision is subject to the individual’s judgment. Due to unforeseen site circumstances, such as poor weather, the lifting schedule often needs to be quickly adapted to minimise impact to the site progress.
Opportunities and Key Challenges
The lifting schedule of the tower crane can be better planned by introducing a shared digital platform for the site contractors to facilitate the scheduling of lifting assignments.
Site contractors can input their lifting requirements into the digital platform, and the platform would weigh the different factors of consideration to generate an optimal and unbiased schedule. Site management should be able to review the schedule before execution. The generated schedule should be adaptable to changes to contractor requirements and site conditions, such as poor weather. Site contractors should also have the flexibility to make adjustments according to their requests.
Sensors and IoTs can be incorporated into the leased tower crane in a non-invasive manner, in order to automatically collect and track data on the lifting operations. This offers visibility of site progress: for example, whether the lifting schedule is on track and which stage of the lifting operation the material is currently at. The data collected would be channelled into the digital platform to provide accurate and real-time updates to all the affected parties.
For the site management and the organisation’s senior management, the digital platform can provide timely updates on the schedule and full visibility of the operations.
The digital platform gathers the lifting requirements of the site contractors and automatically generates an optimal and fair schedule for the tower crane. The digital platform also provides site management with visibility of and control over the tower crane operations. The solution would reduce idle time of tower cranes from 30% to 20%.