Heavy lifting is a
lifting technique specially developed for exceptionally
heavy jobs. The hydraulic cable lifting jack used
in this technique is a true champion when it comes
to exceptionally heavy jobs and therefore the ideal
power source for lifting and pulling activities.
The hydraulic cable lifting jacks are applied in
road and hydraulic engineering, the off-shore
industry, shipyards, the petro-chemical industry and international
prestressing world.
For a number of years,
TT Fijnmechanica B.V. has been the main supplier
of these cable stressing jacks to major international
companies which specialise in heavy lifting and
pulling jobs. One of the most recent projects which
used these cable stressing jacks, was the building
of The London Eye, (the huge millennium Ferris
wheel).
After the horizontal assembly of the giant Ferris
wheel, the wheel was pulled upright using heavy
lifting.
Since
2003 TT Fijnmechanica B.V. produces and delivers complete
heavy lifting systems. Not only the jacks, but
also the power packs and control units. Special
software has been developped which already has
been used successfully. For more information,
please, click here: HEAVY
LIFTING SOFTWARE.
The advantages
of strand jack systems (which are used in heavy
lifting)
compared with a standard crane:
strand jacks are
compact and take up
less space;
they are immensely
powerful (up to 1500 tons per unit) ;
strand jacks can
operate very accurate (in mm);
a full automatic strand
jack system can operate synchronical
very accurate (deviation less that 1
mm);
by coupling several strands
jacks together, large objects can be
easily towed or pulled.
Specifications
standard TT-heavy lifting jacks:
type:
HL45
HL84
HL156
HL228
HL289
HL372
HL444
HL660
HL821
jack
capacity (ton):
45
84
156
228
289
372
444
660
821
type strand (inch):
0.71"
0.6"
0.6"
0.6"
0.71"
0.6"
0.6"
0.6"
0.71"
type strand (mm):
18.0
15.2
15.2
15.2
18.0
15.2
15.2
15.2
18.0
number of strands:
3
7
13
19
19
31
37
55
54
max.
pressure jack (bar):
230
350
350
350
350
350
350
350
350
stroke
(mm):
200
400
400
400
400
400
400
400
400
TT
Survey of standard HL Systems
The
standard 84 ton TT strand jack.
The
biggest mobile crane on land in the world.
2000 Ton heavy lifting capacity.
