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Container weight verificationLet us take the weight off your mind
CWSTM ensures full compliance to the IMO’s SOLAS amendments for container weight verification
Strainstall’s Container Weight System (CWS)TM seamlessly integrates load monitoring technology onto existing container handling equipment, with no impact on operations.
CWSTM is fully configurable to suit existing Terminal Operating Systems (TOS), delivering accurate weight
verification data in real time, as part of the regular lifting cycle at the terminals.
The system can be retrofitted into the spreader, headblock or sheaves, making it a permanent feature
of the container handling equipment with minimal wear. System options are flexible including load pins,
diaphragm load cells or industry standard twistlocks.
Installed and tested in under two hours, the robust construction of CWSTM and it’s environmentally
sealed enclosures provide a lifelong, low maintenance solution to container weighing.
Developed in response to industry needs CWS™ meets the International Maritime Organization’s (IMO)
proposed amendments to SOLAS safety guidelines for mandatory verification of container weight, which
comes into effect 1 July 2016.
In January 2007, the containership MSC Napoli suffered a structural failure and broke up off the coast of the UK. Misdeclared container weights were identified as a factor causing the structural failure.
Using our extensive knowledge and expertise in load measurement and data integration, Strainstall has developed a highly accurate method for container weight verification, that is fast and easy to install.
Features and benefits of CWSTM
Features Benefits
Weighs in motion as part of the ports lifting cycle No delay to port operations
Retrofit solutions for all existing spreader based container handling systems
Flexible integrated solution
Fast installation in under 2 hours Minimal downtime required
Non-consumable load pin or load cell system solutions Low maintenance costs
Simple to install - no special tools or skills required Reduced installation costs
Rugged, proven technology Highly efficient and reliable, reduces downtime and costs
Highly accurate and consistent reliability Exceeds SOLAS requirements
12 month data logging Historic data available for analysis and insurance
Single point streaming data Suitable for TOS or insurance related quotes
Data output in various analogue / digital formats Compatible - data can be fed directly into TOS
Wireless system options Quick installation and eliminates the risk of cable damage
Identifies eccentrically loaded and overloaded containers Improved safety
Simple on-site calibration Minimises future downtime and costs
Easy field repairs in case of damage Minimises downtime
Optional 3G / 4G modem for remote access Enables remote commissioning, operational support and upgrades
Small and lightweight system with minimal power requirements Simplifies installation
Container weight verification FAQ’s
1. What’s happening?
From 1 July 2016, it will be a legal requirement for every export container to have a
verified container weight as a condition for loading aboard a vessel.
2. Why is this happening?
The mis-declaration of weights is a significant issue that arises in almost every trade and
has led to a number of catastrophic incidents. Proper container handling and safe vessel
stowage planning requires the verification of accurate container weights before the vessel
loading process occurs.
3. How can we verify the container weights?
The IMO’s SOLAS amendments provide two approved methods in determining the
container weight:
• Method 1 - weighing the loaded container
• Method 2 - weighing the contents of the container and adding the weight to the
containers tare weight
Method 1 is the only approved way to measure liquids and flexi tanks. The IMO
guidelines state that method 2 ‘would be inappropriate and impractical for certain types
of cargo’ which are not easy to weigh e.g. scrap metal and unbagged grain.
4. What happens if a container does not have verification papers
If a container turns up to a port without a verified weight it can not be loaded on to the
vessel. By installing a container weighing system at the port, any potential issues of
containers being stranded at the terminal need not be a worry.
By installing a retrofit container weighing system into existing container handling equipment
you eliminate the need to provide a dedicated weighing station, simplifying the logistical
flow of the terminal and significantly increasing the port’s operational safety and efficiency.
Twistlock
Annular load cell
Loadpin
Available options
Data processor
User interface
Output/TOS
Wireless or cabled
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Typical CWSTM specification
Developed in response to industry needs CWS™ meets the International Maritime Organization’s (IMO’s)
proposed amendments to SOLAS safety guidelines for mandatory verification of container weight.
System options:
• Bespoke data output formats or strings
• Cabled or wireless spreader / processor communications
• 3G / 4G modem can be fitted for remote diagnostics and upgrades
• Integration with client specific software / hardware
• Simultaneous wireless indication in real-time via additional handset
• Load sensing via twistlocks, annular cells or load pins
Typical specifications
Accuracy Better than ±1% of container weight
Environmental protection IP67
Data output
SerialCANEthernetWiFiOther options available on request
Hazardous area Available on request
Wireless As required
Dimensions - on the spreader 190x160x80mm
Dimensions - in the cab 190x160x80mm
Power - on the spreader 12 / 24 Vdc (max 36Vdc) <500mA
Power - in the cab 12 / 24 Vdc (max 36Vdc) <1A
