WB Equipment Inc. - Supplier of Hydraulic and Pneumatic Jacking Systems for Jacking, Hoisting, Lifting & Moving. Tel: 866-522-5464
RENTALS SALES SERVICE
 
 

STRAND JACKS

Strand Jack Rentals

RENTALS SALES SERVICE

Towerlift
Towerlift is an extremely heavy duty structural
support system for use with strand jacks. It is
specifically designed in modular form for ease
of assembly, erection and worldwide
transportation.

In its basic form it is assembled from only two
members - legs and bracings. Bracings are
connected to the legs by means of a single pin
at each end. Two sets of connection points are
provided on all legs so that the same members
may be assembled in either three-leg triangular
or four-leg square format towers.

The design philosophy is to provide a support
structure which requires minimal external guying
for reduced site disruption.

 




Advantages

Comprehensive, completely
automatic, remote control and
monitoring is as practical reality in
our system which enables benefits
such as:

mechanically fail-safe gripping
  mechanisms

pre-set overload protection

automatic synchronization of
  lifting speeds irrespective of loads

ample operating speeds

load is held mechanically not
  hydraulically at any time
  movement is stopped

movement can be stopped and
  held indefinitely at any point in
  jack stroke

extremely precise adjustment
  of the lift for setting of weld gaps
  or the fitting of steelwork
  connecting bolts

automatic lowering without any
  personnel in attendance at the
   jacks

ready re-distribution of the
  jack loads

minimal re-lubrication of gripping
  mechanisms - lifts of 90 meters
  and horizontal moves of 250
  meters have been completed
  without the need for re-lubrication

gripping mechanisms are fully
  accessible at all times

full efficiency in all attitudes from
  vertical through to horizontal

completely self contained and
  very rugged.


 

Because of its
unrivalled versatility
as a temporary
support structure,
Towerlift can be
used in varying
ways to produce
the most economical
lifting arrangement.

Examples of typical
formats are: paired
towers with crosshead
beams; four-square towers with crosshead
beams; towers with tied cantilever beams; independent luffed towers; portalised luffed towers.



Click for larger picture

Strand Jacks
We operate a range of jacks from 15 to 560 tons
capacity each based upon lift cables of 1 to 37
strands of 18mm diameter, 7 wire, die-compacted,
prestressing strand of guaranteed minimum
breaking load of 38 tons per strand.

Jacks may be used singly, in pairs, or in groups to
give any lifting capacity required.

Power Packs
We operate a large fleet of purpose built diesel-
hydraulic and electro-hydraulic power packs.

All have multiple outlets of matched flow which
automatically ensures synchronized operation
speed of jacks connected to each of these outlets.


In addition to main hydraulics, they also deliver flow for operation of the secondary hydraulic
systems which controls jack gripping mechanisms.From this fleet, we are able to select power
pack and jack combinations to meet all functional requirements of synchronized lifting by
multiples jacks at appropriate lifting speeds.

Monitoring and Control Systems
All power packs have direct, panel mounted, monitoring and control systems.

It would be typical that an operator might control a multi-jack lift or lower by means of two
functional control levers on the power pack with the option of opening or closing hydraulic
flow to all or any of the jacks at any stage by means of line valves.

Maximum pumping pressure, hence jack lifting force, can be pre-set or altered at will by
pressure control valves on the panel.

All pumping pressures to each jack, and each jack's secondary hydraulics pressure, are
displayed on panel gauges.

Further electronic monitoring can display number of lift strokes completed and individual
stroke positions on each jack.

Similar control and monitoring facilities can also be positioned remote from the power
pack to fully computerized systems, including automatic lifting and lowering capabilities.

 
Jack Range table
Jack
Lifting capacity (tons)
Approx. overall dimensions (mm)
Closed height x width x breadth
Stroke
Weight (kg)
Lift 
Cable
Number of Strands
Cable diameter (mm)
L15 15 1200 x 200 x 150 250 70 1 18
L50 45 1700 x 400 x 300 450 400 3 75
L100 105 1400 x 600 x 550 300 750 7 122
L180 180 1700 x 500 x 550 500 1000 12 165
L300 290 2200 x 700 x 700 450 3500 19 205
L450 410 2300 x 750 x 750 450 4000 27 250
L600 560 2300 x 850 x 850 450 4100 37 305
     
 
W.B. Equipment Service Company, Inc. Tel: 866-522-5464 Fax: 201-438-7830 E-Mail: info@wbequipment.com