The strand jack lifting technique originates from the concrete post tensioning principle. A strand jack can be considered a linear winch. In a strand jack, a bundle of steel cables or strands are guided through a hydraulic cylinder; above and below the cylinder are anchor systems with wedges that grip the strand bundle. By stroking the cylinder in and out while the grips are engaged in the anchors, a lifting or lowering movement is achieved.

HSL-Series, Heavy Lifting Strand Jacks

Parameters：
Capacity:15 - 1250 ton
Stroke:250 - 600 mm
Maximum Operating Pressure:350 bar

• Precision control of synchronous lifting and lowering
• Can be controlled by a single operator from a central location for 
increased safety
• Automated locking - unlocking operation
• Two strand sizes: 15,7 mm and 18 mm (0.62 and 0.71 inch)
• Telescopic strand guide pipes prevent bird caging
• Internal components are coated with Lunac, an anti-corrosion 
coating, making it suitable for marine environments
• Lifting anchor included with all strand jacks
• Lloyd’s witness tested to 125% of maximum working load.