JS-Series, Jack-Up Systems▼ JS-250, Enerpac Jack-Up System (one lifting tower shown)

Incremental
Lifting System –Synchronously Lift andMechanically Hold

Typical Applications• Bridge maintenance• Lifting and lowering of heavyequipment• Lifting, lowering and levelling of heavy
structures and buildings• De-propping/load transfer from temporary
steel work.

• Self-contained hydraulics in each jack-up unit for unclutteredwork area• Synchronously lift loads with multiple jack-up units. The mostcommon system set-up includes 4 jack-up units• Lifting barrels are stacked together to mechanically hold the load
• Up to 5% side load capacity depending on lifting height• Computer controls for operating the jack-up system with
automatic and manual lifting settings.

▼ Enerpac has been awarded a contract by
Burkhalter to extend the height of Enerpac’s
2000 ton (500 ton per tower) jack-up systemfrom 20m to 36m for future projects.

244▼ A load is lifted in increments as barrels are slid
into the system, lifted, and stacked; forming‘lifting towers’.

Computer Controls
Enerpac Jack-up Systems provide
precision control suitable formany demanding lifting/lowering
applications. The comprehensive self-contained
design features simple to use software.
• Automatic synchronization of multiple
networked lift points.
• Overload and stroke alarms• Emergency stop switch at jack-up units andcontrols.

▼ Lifting barrels are stacked together to mechanicallyhold the load

Enerpac Jack-Up Systems
Enerpac Jack Up Systems
The jack up system is a custom
developed multi-point liftingsystem. A typical system setup
includes four jack up units positioned undereach corner of a load.

A load is lifted in increments as barrels areslid into the system, lifted, and stacked;
forming ‘lifting towers’. A jack up systemis operated and controlled by a computer
control unit.

Example: A four unit setup with JS250 has
a lifting capacity of 1000 ton (250 ton perunit). The lifting frame of a jack up unit
contains four hydraulic lifting cylinders, one
in each corner, which lift the load using thestacked steel barrels.

Each unit’s lifting and lowering operations
occur simultaneously; the computer control
unit’s synchronous technology maintains
the balance of the load.

JSSeries

Capacity Per Lifting Tower:125 - 750 ton
Lifting Height:

Up to 6 - 20 metres
D1B

234A

5Enerpac Jack Up Systems① End Barrel② Barrel③ Electric Powerpack

Handle for manualbarrel insertion on JS125,
JS250 and JS500.
Automatic barrel
insertion on JS750

End barrel with 3D Swivel④ Lifting Frame⑤ Base Frame
Contact Enerpac!
Contact the Enerpac ofﬁce nearest toyou for advice and technical assistancein the layout of your ideal Lifting
System or visit us at: www.enerpac.com.
Or ask Enerpac for assistance:
enerpac.com/contact-usC®

▼ Enerpac jack-up system hoists 1500 ton span on Fore
River Bridge.

Jack-Up Systems
Capacity
per Tower

ModelNumberAton (kN)

125 (1250)
250 (2500)
500 (5000)
750 (7500)*

Base Frame
Dimensions(mm)

Maximum
Sideload

B

CBarrelDimensions
LxWxH
D(mm)

(kg) *2200
JS-125 3% @ 6m 1200 1100 950 1850 600x600x250
JS-250 3,5% @ 10m 2250 2050 1475 3450 1150 x1150x500 7500
JS-500 4% @ 15m 2800 2300 1700 4500 1700x1700x700 13.000
JS-750 5% @ 20m 3670 3250 2375 6100 2300x2300x1000 24.000

Weight per jack up unit, excluding barrels.

www.enerpac.com

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