Enerpac Strand Jacks

Strand Jacks

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.

The motion of the cylinders is driven by hydraulic power packs. They can be electric or diesel powered. Our sophisticated SCC software program synchronizes the motion of the strand jacks and adjusts the motion to the loads per lifting point.

Enerpac strand jacks are available with two types of strand: a standard strand of 15,7mm and compact strand of 18mm. The 15,7mm strand can work with a dynamic load of 110kN. The 18mm strand can work with a dynamic load of 155kN. The number and type of strands used in a jack determine the safe working load of a jack. For lifting applications Enerpac strand jacks are calculated with a 2,5 safety factor against breaking load to working load.

Enerpac strand jack systems are available from 30 up to 1.000 tonne capacity. We also provide a full range of accessories like a strand guide, strand dispenser and recoiler. All systems are certified and tested under Lloyd’s witness. Each installation is delivered with an instruction and operation manual in English.

Strand DiameterCapacity*Model
Number
No. of
Strands
StrokeWeight
mm (in)ton (kN)(mm)(kg)
15,7 (.62)30 (300)HSL30063480500
70 (700)HSL70067480640
200 (2000)HSL20006194801300
300 (3000)HSL30006314802180
500 (5000)HSL50006484803150
18 (.71)15 (150)HSL15071250100
45 (450)HSL45073480500
60 (600)HSL60074480650
100 (1000)HSL100077480850
200 (2000)HSL20007124801400
300 (3000)HSL30007194802180
450 (4500)HSL45007314803050
650 (6500)HSL65007434803950
850 (8500)HSL85007554805000
1000 (10.000)HSL100007664807650
1250 (12.500)HSL125007846008300

* Capacity is based on 2,5 minimum safety factor over strand breaking load. Download brochure for details.

Theoretical Lifting Speed (m/hr) *
Strand Jack Capacity 
(ton)
Motor Size (kW) *
2,25,57,51518,5303755
1516
30121316
45121316
6091013
7091013
100891116
200610121515
300781111
450671010
500671010
6508815

* Theoretical lifting speeds. Each application should be evaluated to determine the optimum lifting speed for maximum safety and control. Contact Enerpac for more information.
Typical Configuration

  • Set of 4 strand jacks
  • 4 Power Packs
  • 4 fixed anchors
  • 1 SCC Control System
  • 4 data cables 50 meters
  • 4 Hose sets, standard length 5 meters each

Accessories

  • Power Packs
  • Strand Guide
  • Strand Recoiler
  • Strand Dispenser
  • Strand Wedges
  • Heavy-Lifting Strand

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HI-PRESS HYDRAULICS

Riverside Works
Forge Road
Whaley Bridge
High Peak
SK23 7HY

T: + 44 (0) 01663 735089
F: +44 (0) 1663 735090
sales@hi-press.co.uk

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HI-PRESS HYDRAULICS

Unit 2
Hall House Ind Est
New Hutton
Kendal
Cumbria
LA8 0AH

T: +44 (0) 1539 734005
F: +44 (0) 1539 734006
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