Abstract
Tower crane plays a vital role in materials delivery in construction projects. General contractors often use technical and commercial quotes to calculate number of cranes and their engagement duration in project, and they often have to deal with commercial and time risks. The main reason for this approach is the lack of standardised methodologies for calculating tower cranes engagement. Identifying the optimal number of cranes, their location and duration of engagement at the building site are the major factors that can reduce the risks considering the time and cost by increasing productivity and thus decreasing the required time. Calculation will be based on different production parameters -space per worker, concrete production per crane or worker, lifting time. This paper presents a methodology for calculating the required number of cranes and their optimal positioning. Proposed model for crane engagement optimisation is developed using the Critical Path Method in Primavera P6 software.
Highlights
A typical high-rise building construction involves lifting materials of different sizes, types and weights within planned time and under different limitations provided by the logistics as well as the commercial, health & safety and administrative aspects of the process
This paper provides a case study with such analysis for a large commercial construction project with suggestions for possible improvements and optimisation in tower crane’s engagement
4 Conclusion This overview and analysis is an attempt to present and clarify the main topics related to crane engagement analysis, calculation and management in high-rise building construction
Summary
A typical high-rise building construction involves lifting materials of different sizes, types and weights within planned time and under different limitations provided by the logistics as well as the commercial, health & safety and administrative aspects of the process. Any delays during the pre-construction period (design, approvals and procurement) will affect the construction time, and it will be required to develop a proper mitigation strategy for any of these delays within the construction period In this case, the best option is to reduce or mitigate delays by increasing the number of cranes and optimising their positions and number, along with the appropriate corrective measures and increasing required resources such as labour, material, other equipment. The best option is to reduce or mitigate delays by increasing the number of cranes and optimising their positions and number, along with the appropriate corrective measures and increasing required resources such as labour, material, other equipment These measures will increase the production reducing the time delay. This paper provides a case study with such analysis for a large commercial construction project with suggestions for possible improvements and optimisation in tower crane’s engagement
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