PERFAB ENGINEERING PTE LTD required a synchronized lifting solution for handling long-span steel structures, heavy pipe bundles, and prefabricated assemblies at a working height of 4 meters. Traditional multi-point lifting methods introduced risks of uneven elevation, structural tilting, and load instability, particularly when handling large welded components with extended spans.
To address these challenges, Gradin engineered a customized Twin Synchronous Mobile Scissor Lift System (Model SJG3.0-4.0). The system consists of a centralized control cabinet, a hydraulic power unit, and two independently operated 3000kg scissor lift platforms, providing a combined lifting capacity of 6000kg.
A hydraulic synchronization motor and precision flow-divider valves maintain accurate platform synchronization throughout the lifting cycle, significantly reducing the risk of load distortion, platform misalignment, and unsafe lifting conditions. This allows operators to position large steel assemblies with greater confidence and efficiency during welding and fabrication operations.
To maximize flexibility inside the workshop, each platform is equipped with four 5-inch heavy-duty omnidirectional casters for easy movement and positioning. Once aligned, integrated manual outriggers lift the wheels off the ground and establish a rigid, non-slip working base.
For long-term durability, the scissor mechanisms are manufactured from 25 × 140mm high-strength steel flats supplied by Laiwu Steel, while the platform frames utilize 16# channel steel construction. Critical pivot points incorporate HA self-lubricating composite bushings (SF-1 X), reducing wear and supporting reliable performance under frequent lifting cycles.
To comply with Singapore Ministry of Manpower (MOM) requirements, the system successfully completed 125% proof-load testing, Factory Acceptance Testing (FAT), and supporting engineering verification procedures. The project was delivered with the required compliance documentation and commissioned for safe operation within the customer’s steel fabrication facility.
