Summary
How Ball Decks Keep Global Air Freight Moving Safely and Efficiently
Ball transfer units are essential components in air cargo handling systems worldwide.
Arranged in arrays called ball decks, they enable operators to load, unload, position, and weigh Unit Load Devices (ULDs) and cargo containers with precision and minimal effort. Ball decks are found in aircraft cargo holds, at cargo terminals, on weighing stations, and throughout the air freight logistics chain.
The global air cargo industry moves over 60 million tonnes of freight annually, and almost every piece of that cargo passes over ball transfer units at some point in its journey. From the moment a container is loaded at a warehouse to the point it is positioned inside an aircraft, ball decks provide the low-friction, omnidirectional movement that makes modern air freight logistics possible.
What Is a Ball Deck?
A ball deck is a flat surface embedded with an array of ball transfer units. The balls sit slightly proud of the surface, creating a low-friction platform over which heavy items — such as ULD containers and pallets — can be pushed, pulled, and guided in any direction by hand or with minimal mechanical assistance.
Ball decks are purpose-built for the air cargo industry and are engineered to withstand the heavy loads, demanding duty cycles, and strict safety requirements of aviation logistics. They are typically manufactured from steel or aluminium, with heavy-duty ball transfer units rated to handle the substantial weights involved in cargo operations.
Where Ball Transfer Units Are Used in Air Cargo Aircraft Cargo Holds
Inside aircraft cargo compartments, ball transfer units are integrated into the floor structure to allow ULDs to be rolled into position during loading and secured for flight. The omnidirectional movement provided by the balls allows ground handlers to guide containers precisely into their designated positions, even in the confined space of an aircraft hold.
Cargo Terminal Workstations
At cargo terminals and handling centres, ball decks serve as transfer platforms where ULDs are moved between different stages of the handling process — from build-up stations where containers are packed, to storage areas, to the truck or dolly that takes them to the aircraft.
Ball decks at these stations allow a single operator to reposition containers weighing several tonnes.
Cargo Weighing Stations
Air cargo floor scales use ball decks with integrated weighing systems. The ball transfer units allow ULDs to be rolled smoothly onto and off the scale, speeding up the weighing process and preventing damage to both the container and the scale. Accurate weight measurement is critical in aviation — overloaded aircraft pose serious safety risks — and ball deck scales make the process fast, safe, and reliable.
Truck and Dolly Loading
Ball transfer units are also fitted to cargo dollies and truck beds used to transport ULDs between the terminal and the aircraft. This allows containers to be rolled on and off the vehicle without the need for cranes or forklifts, reducing turnaround times and minimising the risk of handling damage.
Why Ball Transfer Units Are Critical in Air Cargo
Speed and Efficiency
Aircraft turnaround time is one of the most significant cost drivers in aviation. Every minute an aircraft spends on the ground is a minute it is not generating revenue. Ball decks enable rapid loading and unloading, with operators able to position heavy ULDs quickly and precisely without waiting for powered equipment.
Safety
Manual handling of heavy cargo is one of the most significant injury risks in the logistics industry. Ball transfer units reduce the physical effort required to move heavy loads to a fraction of what would otherwise be needed, dramatically reducing the risk of musculoskeletal injuries to ground handling staff.
Precision
ULDs must be positioned precisely within aircraft cargo holds to meet weight and balance requirements. The omnidirectional movement provided by ball transfer units allows fine positional adjustments that would be impossible with rollers or other single-axis conveying methods.
Cargo Protection
Ball transfer units provide smooth, controlled movement that minimises the jolts, impacts, and sudden direction changes that can damage cargo. This is particularly important for high- value and fragile freight, where handling damage has significant financial consequences.
Specifying Ball Transfer Units for Air Cargo
Air cargo applications place demanding requirements on ball transfer units. The key specification factors include:
Load capacity: ULDs can weigh several tonnes when loaded. Heavy-duty ball transfer units with individual load ratings of 500 kg or more are typically required, with the total ball deck capacity engineered to handle the maximum expected load with an appropriate safety margin.
Durability: Cargo handling is a high-frequency operation. Units must withstand continuous use, often 24 hours a day, without degradation in performance. Precision-machined heavy- duty units with recirculating ball designs offer the longest service life.
Corrosion resistance: Cargo handling often takes place outdoors or in environments exposed to weather, jet fuel, de-icing fluids, and cleaning chemicals. Stainless steel
construction or corrosion-resistant coatings are frequently specified.
Low friction: The whole point of a ball deck is to enable easy movement. Specify units with the lowest possible coefficient of friction to ensure operators can move heavy loads with minimal effort.
Alwayse and Air Cargo
Alwayse has been supplying ball transfer units to the air cargo industry for decades. Our heavy-duty range is engineered to meet the exacting demands of aviation logistics, with load capacities, corrosion resistance, and durability designed for continuous cargo handling operations.
We also work with air cargo equipment manufacturers and ground handling companies to design bespoke ball deck systems tailored to specific operational requirements — from purpose-built weighing station decks to modular systems for cargo terminal fit-outs.
To discuss your air cargo handling requirements, contact the Alwayse team at sales@alwayse.co.uk or call +44 (0)121 380 4700.
Frequently Asked Questions
What is a ball deck in air cargo?
A ball deck is a flat platform embedded with an array of ball transfer units, designed for the air cargo industry. It allows Unit Load Devices (ULDs) and cargo containers to be moved smoothly in any direction with minimal effort. Ball decks are used in aircraft cargo holds, at cargo terminals, on weighing stations, and on cargo dollies.
Why are ball transfer units used instead of rollers in air cargo?
Ball transfer units provide omnidirectional movement — cargo can be pushed in any direction, including sideways and diagonally. Rollers only allow movement along a single axis. In air cargo operations, where containers need to be precisely positioned in confined spaces, this directional flexibility is essential.
How heavy are the loads handled by air cargo ball decks?
Loaded ULD containers can weigh several tonnes. Ball deck systems are engineered with heavy-duty ball transfer units to handle these weights safely, with individual unit capacities typically ranging from 500 kg to over 2,000 kg depending on the application.
Can ball decks be used outdoors?
Yes. Ball decks used on airport aprons and outdoor cargo areas are typically constructed with stainless steel or corrosion-resistant ball transfer units to withstand exposure to weather, jet fuel, de-icing chemicals, and other environmental factors.