Hydraulic Strand Jacks
Strand jacks are widely recognized as the most sophisticated heavy lifting solution. They are used around the world whenever a conventional crane is not practical or economical. A strand jack system provides precise synchronous control with heavy lifting capacity in an economical, reliable, and compact footprint with capacities from 17 to 1,405 tons per jack.
Engineered Rigging’s Strand Jack System can be controlled by a single operator from a central location which improves safety. We offer computerized control for up to 60 strand jacks simultaneously. Power is supplied by diesel or electric hydraulic power packs and a lifting anchor is provided.
Strand Jack Systems are widely used in the oil and gas industry and are ideal for industrial plant maintenance projects, ports and construction sites that do not have the area needed to operate a large crane.
Read about an innovative use of Engineered Rigging’s strand jacks in New Equipment Digest.
Strand Jack Features
- Enerpac strand jacks are powered by electrical or diesel driven hydraulic power packs and controlled by Enerpac’s proprietary SCC-Smart Cylinder Control System to ensure full control of lifting and lowering operations.
- 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: 0.62 in (15.7 mm) and 0.71 in (18 mm)
- Telescopic strand guide pipes prevent bird caging
- Lifting anchor included with all strand jacks
- Lloyds witness tested to 125% of maximum working load
- Capacity is based on 2.5 minimum safety factor over strand breaking load
Strand Jacks At Work!
A dozen strand jacks were used to lower over 100 irregular loads at the Panther Island Bridges project in Ft. Worth, TX by Engineered Rigging’s client, Texas Sterling. Read More
How Does a Strand Jack Work?
Essentially, a strand jack is a linear winch in which a bundle of steel strands moves through a main lifting jack. Above and below the cylinder are anchor systems with wedges that grip the strand bundle simultaneously. Lifting and lowering a load is achieved by hydraulically controlling the main jack and two mini jacks (at the top and bottom) alternately. If the system loses pressure, the wedges automatically close, mechanically locking the load in place. This safety features eliminates the dangers associated with the suspended loads of cranes. Up to 60 strand jacks can be controlled simultaneously by a single operator.
Is a strand jack the optimal lifting solution for your project? Eddy Kitchen can help identify the best heavy lifting equipment for your needs. Contact him at 1.804.814.4844 or eddy@engineeredrigging.com.
Strand Jack Systems
METRIC TONS (mtons)
STRAND DIAMETER (in)
MODEL NUMBER
NUMBER OF STRANDS
WEIGHT (lbs)
17
0.71
HSL1507
1
220
34
0.62
HSL3006
3
1,102
51
0.71
HSL4507
3
1,102
67
0.71
HSL6007
4
1,433
79
0.62
HSL7006
7
1,411
112
0.71
HSL10007
7
1,874
225
0.62
HSL20006
19
2,866
225
0.71
HSL20007
12
3,086
337
0.62
HSL30006
31
4,806
337
0.71
HSL30007
19
4,806
506
0.71
HSL45007
31
6,724
562
0.62
HSL50006
48
6,945
731
0.71
HSL65007
43
8,708
955
0.71
HSL85007
55
11,023
1,124
0.71
HSL100007
66
16,865
1405
0.71
HSL125007
84
18,298
