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 Diameter Capacity* Model
Number
No. of
Strands
Stroke Weight
mm (in) ton (kN) (mm) (kg)
15,7 (.62) 30 (300) HSL3006 3 480 500
70 (700) HSL7006 7 480 640
200 (2000) HSL20006 19 480 1300
300 (3000) HSL30006 31 480 2180
500 (5000) HSL50006 48 480 3150
18 (.71) 15 (150) HSL1507 1 250 100
45 (450) HSL4507 3 480 500
60 (600) HSL6007 4 480 650
100 (1000) HSL10007 7 480 850
200 (2000) HSL20007 12 480 1400
300 (3000) HSL30007 19 480 2180
450 (4500) HSL45007 31 480 3050
650 (6500) HSL65007 43 480 3950
850 (8500) HSL85007 55 480 5000
1000 (10.000) HSL100007 66 480 7650
1250 (12.500) HSL125007 84 600 8300

* 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) *
2,2 5,5 7,5 15 18,5 30 37 55
15 16
30 12 13 16
45 12 13 16
60 9 10 13
70 9 10 13
100 8 9 11 16
200 6 10 12 15 15
300 7 8 11 11
450 6 7 10 10
500 6 7 10 10
650 8 8 15

* 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

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Whaley Bridge
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SK23 7HY

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

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HI-PRESS HYDRAULICS

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Hall House Ind Est
New Hutton
Kendal
Cumbria
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T: +44 (0) 1539 734005
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