Cases
Semi-Conductor Transformers Moving Project
Project Challenges:
Transformers at the plenum level were required to be delivered after the roof truss was constructed. This was different from the original plan of lifting equipment to position first. The project also had to be expedited.
Solution:
Jaberson was engaged to study and propose a moving solution for loads that were up to 32 times the dynamic load capacity of the building structure.
The team of planning specialists worked closely with the multi-disciplinary departments and proposed a workable solution, which was independently checked by a professional engineer. Approvals were obtained within a month and the project was executed safely and ahead of schedule.
66kV Sub-Station Transformers Moving Project
Project Challenges:
4 units of High Voltage Power Transformers weighing 67 tons each were to be delivered within a tight working area. During the design phase, Jaberson was invited to partner on feasibility studies and propose a solution.
Solution:
A combination of the latest tools (Hydraulic Skidding System, Self-Locking Cube Jack, Turn-table) was selected. The transformers were:
- Delivered to the site by self-propelled transport
- Jacked down via the Self-Locking Cube Jack
- Skidded into transformer bay via the Hydraulic Skidding System
- Rotated into final position via the Turn-table
Laser alignment devices were used throughout every stage, and all movements were completed with precision in a safe and timely manner, without any time lost for final positioning or leveling. Jaberson’s continuous investment in upskilling our workforce and tools has once again proven that we are ready for different challenges.
Data Centre DRUPS Project
Project Challenges:
4 sets of diesel rotary uninterruptible power supply (DRUPS) weighing 77,600kg each, were to be lifted to the upper roof of the building. As the client’s building was already in operation, emergency access must be available at all times. There was also limited crane parking space and lifting hours.
Solution:
The project team had studied the DRUPS design in detail. As a result of our familiarity with the equipment, we were able to submit a feasible yet cost-efficient solution of:
- Knocking down the DRUPS
- Skidding the components to position
- Assembling and coupling work on the roof
Jaberson was selected for this project based on our proposed solution. Various safety measures such as ground load bearing checks, safe working access for personnel were designed and put in place.
Chiller Replacement Project
Project Challenges:
Due to the size of the chiller, and with the chiller plant room located in the basement, only a handful of pathways can be considered for the move-in/out works. The project location also has heavy vehicular movement round the clock, therefore one of the key requirements was to minimise disruptions to the client.
Solution:
During the planning stage, it was determined that the crane parking area was a cantilevered slab hence unable to bear the force from the outrigger. A fresh proposal was drawn with load spreading beams deployed so as to disperse the outrigger pressure over a larger area. This was also independently checked by a Qualified Person (QP).
The chiller was a complete knockdown (CKD). The proposed solution was:
- Building containment frames to secure the odd-sized components
- Delivering them in parts
- Lifting them down to the basement to be moved in
- Assembling them on site
Pharmaceutical Chiller Replacement Project
Project Challenge:
2 units of duplex chillers weighing 43,000kg each, were to be replaced at a pharmaceutical plant. During the finalisation of the design stage, the client decided to have the replacement done with chillers as a complete knockdown (CKD). This is due to the tight space in the chiller plant and the overhead live piping. Another concern was that the chiller plant is on level 2 and hoisting down a complete chiller may be challenging.
Solution:
As CKD of chillers comes with its own set of risks and challenges, the Jaberson team was invited to assess if there are any alternative methods.
The solution deployed by Jaberson included:
- Usage of low-height skidding rollers
- Construction of a 50,000kg SWL lifting platform
- Using two cranes for the platform lifting operations
The project was completed ahead of schedule, on time and safely.
