Recommended Safety Features for Container Cranes
- CP&A Staff
- 4 days ago
- 5 min read
Many ship-to-shore container crane accidents are hidden from the public eye. Regulatory requirements represent the minimum standard, but it is always possible to go beyond them. We believe it is prudent to consider additional safety systems that can help prevent the most common or costly accidents occurring across the industry, reducing risk and protecting both personnel and assets.
Purchasers of ship-to-shore container cranes should consider insurance claims as a yardstick with which to measure the room for improvement in attitudes towards safety systems, this despite the existing plethora of international standards, national laws, and industry rules covering everything from design and manufacture to daily operation and maintenance.
When stack collisions, for example, account for around 10% of insurance claim costs, the need for mitigation is self-evident. If the claim costs were closer to 1% it could become a marginal issue, but at a tenth of all claim costs, it demands attention. It’s fundamentally about managing risk. By understanding the costs of specific types of accidents across the industry, companies can make informed decisions about which safety systems to implement. This targeted approach allows steps to be taken to reduce the likelihood of the most common incidents, improving both safety and operational efficiency.
Special report
Meaningful data was interspersed throughout a recent report about the minimum safety features for what it referred to as ‘quay cranes’, co-authored by the TT Club, the International Cargo Handling Coordination Association (ICHCA) and the Port Equipment Manufacturing Association (PEMA). TT Club is a provider of mutual insurance and related risk management services to the international transport and logistics industry; ICHCA provides a focal point for informing, educating, networking, shaping, and sharing industry views to help improve cargo handling throughout international supply chains; and PEMA represents a powerful public voice for the industry worldwide, as well as a platform from which to influence future legislation, policy and standards.
The report began with more than 2,000 insured operations, including over 400 ports and terminals globally, the claims data gathered by TT Club provides a real perspective of the types and causes of accidents globally. Casper, Phillips & Associates Inc. (CP&A), meanwhile, offers a wide variety of services, including specification, design, manufacturing review, modification, and accident investigation. We are all advocates for pushing those buying container cranes to go further than regulatory requirements when it improves safety and makes good fiscal sense.
As the report continued, boom-to-vessel collisions represented the single largest cost category in quay crane insurance claims. Shockingly, roughly a quarter of ship-to-shore crane claim costs result from boom-to-vessel, or boom-to-ship, collisions. In one notable case, a collision that bent a crane boom required six months and approximately $2 million to repair, with a further $6 million in lost revenue. Many cranes are fitted with trip wire boom collision prevention systems, leading some terminal operators to assume they are adequately protected. But these systems can be maintenance-intensive and, depending on gantry speed, may not react quickly enough to prevent impact.
While some incidents, like a vessel striking a crane during berthing, are harder to prevent, modern systems can stop the crane from hitting berthed vessels. The most effective solutions are electronic systems with two detection zones: a warning or slowdown zone to reduce gantry speed and alert the operator, followed by a stop zone to prevent further motion. These systems can also protect against crane-to-crane collisions. Additional safeguards include gantry-level crane-to-crane systems, rail obstruction detection, and stack profiling.
Specification - Beyond the Minimum
When purchasing any crane, the specification stage is critical for implementing safety systems because it is the point at which the operational, environmental, and safety requirements of a crane are formally defined. Typically, a crane purchaser issues a tender and a specification, which is a legal contract document that defines the seller's technical responsibilities to the buyer. The crane specification is typically part of the bid package. Defining legal obligations is obviously necessary but, as we’ve explored before, a specification can be far more valuable if it also serves as an excellent communication tool for all parties working on a project.
The original equipment manufacturer (OEM) will provide estimates to design and build a crane that meets the specifications. If the specification only requires safety systems per existing regulatory requirements, OEMs will often only supply the regulatory minimums because compliance represents the clearly defined baseline for legal safety and market acceptance. Going beyond the regulations without a clear directive to do so can add significant design, production, manufacturing, and testing costs. Unless there is a clear commercial, technical, or reputational incentive, the additional investment in extra safety measures may be overlooked because it is not required.
When selecting an OEM, price is always a consideration, though how heavily it influences the decision varies by client. This means that if a feature isn’t regulated but should be included, it needs to be included in the specifications. Otherwise, crane manufacturers will not include additional features to keep costs as low as possible.
One such feature is consideration of parking wind - not just operating and stowed conditions. In some conditions, cranes may need to operate at wind loads higher than the normal operating limit to reach their stowage positions safely. Increasing gantry drive and braking capacity to handle winds above the operating threshold, but below full stowage conditions, provides additional protection against sudden microburst gusts. Wind-related incidents account for approximately 11% of global crane claim costs, with most stemming from uncontrolled movement in high winds. It is important to note that actual wind conditions are location-dependent, and specifications should reflect site-specific environmental factors.
Another such feature is hoist emergency brakes, which are essential to prevent single points of failure in critical components. Without them, failures in the gearbox, such as damaged gears or keys, could lead to load drops. Similarly, failure of the drum coupling or high-speed shaft coupling would prevent the high-speed motor brakes from effectively transferring torque to the drum, compromising load control and safety.
The message is permeating; we are seeing increased demand at the point of specification for our crane base anti-seismic isolation system (BASIS) on ship-to-shore gantry cranes at the quayside. We have been utilizing nonlinear time history analysis (NLTHA) for research and engineering projects since 1991. BASIS is built on NLTHA and can protect the crane main structure from damage even in contingency level earthquakes. BASIS has been successfully installed and commissioned on new cranes in major seismic zones.
Elevating best practices
Membership in organizations like PEMA is one method of actively exchanging expertise to elevate industry best practices. We gain valuable insights into industry trends, including data on crane sizes and other key developments. PEMA also provides members with a platform to contribute their perspective alongside other companies in the sector. Their publications offer comparisons, analyses, and discussion of topics relevant to the community, essentially serving as informed, collective industry guidance. Building on this knowledge, our goal is to inform crane purchasers about safety features that go beyond regulatory requirements, supported by insights and commentary from engineers actively working in the industry. By combining regulatory compliance, risk awareness, and industry expertise, purchasers are better equipped to make decisions that enhance safety and operational efficiency.
Inescapably, engineers play a central role in solving complex problems and in developing both regulatory requirements and the safety systems themselves. Importantly, this perspective is not just an individual opinion, it reflects the informed views of professionals working across the industry, whose insights we support and amplify.
By combining engineering expertise with industry-wide insight, crane purchasers and operators are better equipped. Understanding risk, specifying the right safety systems, and leveraging proven industry knowledge all contribute to safer, more reliable operations, protecting both personnel and assets while supporting operational efficiency.
