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Energy&DataTransmissionSystems
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Solutions for Ports & Container Handling
LASSTEC
Weighing Systems

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The problem….

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Just weigh these containers....!
The simple solution

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IMO Regulation
concerning container weighing
IMO (International Maritime Organisation) decided to make
container weight verification mandatory
• The SOLAS (Safety of Life at Sea) amendment for mandatory container weight
verification prior to loading containers onto a vessel was accepted the 20th of
September 2013.
• Amendment expected to enter into force in July 2016.
It is the shipper’s responsibility to declare the correct container weight!
If the shipper does not declare the correct container weight, then the terminal shall
weigh the container and charge the shipper.

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Weighing containers with weigh bridges at the gate entry
can be cumbersome if the trucks arrive with 2x20ft
containers.
Where best to weigh containers?

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Weighing with STS cranes is too late to update the stowing
plan.
Some South American countries demand containers to be
weighed as they are being off loaded.

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Weighing in the stacking yard with twistlocks is the best
option. All containers are passing by the stacking yard,
even transsipped containers.

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An innovative development
uses the spreader twistlocks to
weigh containers and to
improve safety in container
handling.
INPUT from
Twistlock Sensors
Interrogator
Interrogator cabinet
On-board monitor
Weighing on the Spreader Twistlock

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Additional Benefits
• Determining load eccentricity of containers
even in twinlift mode
• Operational safety
• Life cycle monitoring of twistlock and spreader

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The sensor measures the
elongation of the
twistlock shaft which
allows to calculate the
load on the twistlock.
The Twistlock
The twistlock becomes the load cell!

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• The TWISTLOCK can provide
viable load and safety
information.
• The neutral line of the twistlock
is not subject to torsional and
bending stresses.
• It’s the best place to measure
the load.
The Twistlock

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Alternating bands of high and low refractive index
UV Laser Light
Single-mode Optical Fibre
• Created by exposing fibre to UV laser light
• Exposed region acts as a narrowband mirror
• Reflected wavelength varies with Strain and
Temperature
• The temperature effect is compensated in the sensor
Tension & Temperature
Temperature
Wavelength
Wavelength
Manufacturing technique of a fiber optic sensor
125 diameter fiber
Technology

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Why is fiberoptic sensor technologie ideal for twistlock load
sensing?
• Inert to electro magnetic interference
• Stable over many years (glas)
• No corrosion
• The sensors are very robust and shock resistant.
• High accuracy
• Very high measuring range. The fiber breaks only when the twistlock breaks.
Technology

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Communication
between spreader and crane
o The LASSTEC system is easily
retrofitted into existing spreaders
and cranes.

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Image with empty containers Image with loaded containers
Load display
of the monitor in the crane cabin

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• Real time weight on the monitor = for the driver
• Stabilised weight (actual container weight) = for the TOS*
• Peak load (when picking up the container) = for the
maintenance
department
Type of weight information…
TOS = Terminal Operating System

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Life Cycle Monitoring
Load cycles of twistlocks and spreaders
• Graphics visualise potential structural problems of spreaders and usage of
twistlocks
Twistlock 3 showed
abnormal loadings which
later on turned into a
spreader structural
problem.

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• 190 tons overload test. The sensor breaks when the twistlock breaks.
• 2 million load cycles 0 – 10 tons.
• 1 million 0 – 90 deg twistlock lock and unlock cycles.
• 140’000 shock loads equivalent of lowering the spreader at 180m/min
onto a container.
• Load stability at 30 tons and 70 deg C during 24 hours
Twistlock overload test Interrogator shock and
vibration test
Sensor dynamic load test
LASSTEC proven product …..

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DPW: - 10 Systems in Tarragona, Spain
- 5 Systems in Aden, Yemen
- 52 Systems in T3 Dubai, UAE
APM Terminals: - 2 Systems in Houston, USA
PSA: - 1 System in Mersin Turkey
Hutchison: - 1 System in Felixstowe, UK
- 2 System at ECT, Rotterdam, Holland
ICTSI: - 7 Systems in Guayaquil, Equador
- 7 Systems in Tamatave, Madagascar
- 16 Systems in Manila, Philippines
(Sales figures as per October 2013)
LASSTEC Major References……

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Spreader OEMs provide twistlocks drilled
Spreader maker Status Twistlock part number
BROMMA Cooperation
agreement in process
1701365
RAM Fully integrated A614 – 09 - 01
STINIS Fully integrated ………..
Mi – Jack Fully integrated ………..
ELME Ready to integrate
EARLS Ready to integrate
ZPMC Integration in
progress

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The new IMO legislation will make container weight verification mandatory. Shippers
will be responsible to weigh containers, but terminals are in an excellent position to
provide the weighing service to the shippers and to make an additional revenue:
Assumtions:
Number of RTGs: 60 units
Number of STS: 20 units
Number of TEUs per year: 2’000’000
Number of containers to be weighed per year: 1’125’000
Admin cost to weigh containers per year: € 100’000.-
Charge to the shippers to weigh one container: € 5.-
Total investment cost to equip all RTGs: € 1’200’000.-
ROI of weighing systems: 2,7 months
Administrative and maintenance cost of weighing: € 0,18 per container
Annual revenue of weighing containers: € 5’525’000.- per year
And….
There is an additional opportunity to charge shipping lines for providing accurate container weights.
*** Ask your agent or Conductix to calculate your revenue potential of your terminal.
The commercial opportunity for
terminals to weigh containers

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Lasstec Weighing System

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