Today, the safe and secure lashing of containers remains a top priority for ship operators, port workers, and logistics planners. With larger vessels and tighter schedules, proper container lashing is important. However, as industry rules evolve, as an operator, you must stay informed on best practices.
What is Container Lashing?
Container or cargo lashing refers to the process of securing shipping containers to a vessel with the help of approved fittings. It prevents container movement due to various factors and provides cargo with safety, vessel with stability, and crew with protection.
Importance of Safe Container Lashing
- Containers that are properly lashed reduce the risk of accidents on board.
- It helps adhere to IMO, SOLAS, and CSS codes for container securing and avoids legal penalties.
- Correct lashing prevents cargo damage caused by movement, vibrations, or rough seas.
- Fewer accidents and cargo damages lead to lower insurance claims and premiums.
- If cargo carrying hazardous materials is split, it can cause environmental pollution; secure lashing prevents this.
Types of Container Lashing Systems
1. Twist Lock Systems
Twist locks lock containers vertically at the corner castings. They are available in manual, semi-automatic, and fully automatic variants. Modern twist locks are designed in a manner that they can handle higher dynamic loads while meeting updated ISO safety standards.
2. Chain Lashing Systems
Chain lashing systems are used mainly for special cargo or on flat racks and open-top containers. Chains offer flexibility and have high load-bearing capacity.
3. Bridge Fitting
Bridge fittings and stacking cones help maintain vertical alignment between containers. They are useful in mixed container stacks.
4. Lashing Rod
This system uses steel lashing rods connected to turnbuckles to tighten containers laterally and longitudinally. It provides strong resistance against rolling and pitching forces.
Pre-lashing Safety Checks
- Check all ropes, chains, straps, or wires for frays, cuts, corrosion, or broken strands before use.
- Inspect hooks, shackles, ratchets, and other fasteners for cracks, deformation, or rust.
- Inspect ratchets, turnbuckles, or tensioners for smooth operation.
- Account for weather, road conditions, and vibration factors that may affect lashing performance.
- Plan lashing points to evenly distribute tension across the cargo.
Safe Working Practices During Container Lashing
- Verify that all staff wear the required personal protective equipment, such as hard hats, gloves, boots, eye protection, and reflective clothing.
- Report and tag defective equipment immediately.
- Establish and mark safe exclusion zones around the lashing area.
- Use tag lines when guiding containers to prevent uncontrolled movement.
- Get marine transit insurance to deal with financial losses.
Common Mistakes in Container Lashing
- You are loading beyond the maximum payload or stacking limits that puts stress on lashings and structural components.
- Certain cargoes, such as liquids, heavy machinery, and bulk goods, require specialised lashing methods. If you are using generic lashings, it can result in damage or unsafe transport.
- Combining chains, wires, or synthetic straps without considering their strength, elasticity, and compatibility.
- Placing securing gear in a way that obstructs container vents or access hatches.
- Ignoring differences in stowage plans, such as bay plan changes that affect lashing requirements.
- Ignoring differences in stowage plans, such as bay plan changes that affect lashing requirements.
Emergency Situations Related to Container Lashing
- If a fire occurs within a container, it may cause internal pressure and lashings may pop or damage gear.
- A vessel collision or grounding that creates violent motion can impact container lashing integrity.
- Structural failure of lashing bridges or deck fixtures reduces load resistance.
Conclusion
Safe container lashing combines correct planning, certified equipment, proper tensioning, and continuous monitoring. By strictly following approved guidelines, investing in marine insurance, and adapting to sea conditions, operators can significantly reduce cargo loss, protect crews, and maintain vessel safety throughout the voyage.
FAQs
What are the key components used in container lashing?
In container lashings, you can find lashing rods, turnbuckles, twist locks, bridge fittings, deck sockets, and lashing bars.
Who is responsible for container lashing on a ship?
Container lashing is primarily the shipowner’s responsibility, executed by the ship’s crew or contracted lashers under the master’s supervision, following the approved cargo securing manual.
What is the consequence of improper container lashing?
Improper container lashing can cause cargo to shift or be lost overboard. They may also result in vessel instability, structural damage, crew injuries, and voyage delays.
Disclaimer: The information provided in this blog is for educational and informational purposes only. It is advised to verify the currency and relevance of the data and information before taking any major steps. Please read the sales brochure / policy wordings carefully for detailed information about on risk factors, terms, conditions and exclusions. ICICI Lombard is not liable for any inaccuracies or consequences resulting from the use of this outdated information.