Mobile containers in offf-road operations

The equipment is on the vehicle – but the vehicle can go no further. Every fire brigade, every technical rescue organisation, every civil protection unit knows this situation: the staging area has been reached, the forest track ends, the flood embankment is waterlogged, the railway tunnel has no driveable surface. Heavy mobile containers still need to get there. Anyone relying on standard castors at this point is left pushing and struggling – losing time that no one at the incident scene can afford. At MUNK, we have developed two systems for exactly this challenge: the Offroad-Fahrwerk as the proven base solution, and the Offroad-System Premium as the new professional system, presented for the first time atInterschutz 2026.

"Our standardised vehicles are designed for roads and limited off-road use – that is Category 2 under DIN EN 1846, and rightly so. But they have a boundary: the unpaved, uneven ground beyond the staging area. That is precisely where the actual operation often begins – on the forest track, on embankments, on rail lines, over obstacles – and where the vehicle's safe passage ends. What counts from that point is logistics over the final stretch. And for that stretch, a different answer is needed."
Ferdinand Munk, Owner and Managing Director, MUNK Group | Emergency Services and Civil Protection Representative, Günzburg District | Advisory Board Member, German Fire Service Association

Off-road mobile container logistics means fitting standard mobile containers with a specialist undercarriage that moves them safely across difficult terrain. A mobile container is a manually operated wheeled transport unit – used daily by fire brigades, technical rescue organisations, and civil protection units. On smooth warehouse flooring it runs without issue. As soon as loose forest soil, waterlogged meadow paths, roots, or gravel appear, it sinks in and becomes immovable.

Three factors determine off-road capability: wheel diameter, ground clearance, and the lifting system. Tyres with a minimum diameter of 360 mm and an aggressive tread pattern significantly reduce rolling resistance on soft ground. High, adjustable ground clearance prevents the container from bottoming out. A mechanical lifting system raises it clear – even if it has already sunk in.

One clear limitation applies to all off-road systems: they work as long as the ground still provides traction. If emergency personnel are sinking ankle-deep in their boots, large pneumatic tyres will still get through. But if mud reaches knee height, even the best undercarriage reaches its limit. Mobile containers loaded with several hundred kilograms can sink even on wide pneumatic tyres once the ground loses all bearing capacity. The off-road system significantly extends the operational range – but it is not a substitute for a tracked vehicle.

This is where the mobile container clearly differs from the hook-lift container: hook-lift containers are multi-tonne swap-body units on lorry chassis, deployed only by mechanical means. A mobile container remains a compact, manually manoeuvrable unit – transported flexibly in logistics support vehicles or multi-purpose response vehicles.

Four scenarios illustrate where conventional mobile containers fail and off-road systems keep logistics moving.

Vegetation fires and wildfires

Firefighting crews must transport portable pumps, hose lines, and breathing apparatus deep into steep, inaccessible terrain. Firefighting water is often drawn from open water sources; the route to the extraction point runs across steep riverbanks. Standard castors sink immediately into loose forest soil. Off-road undercarriages speed up the establishment of containment lines and ensure a continuous water supply. Tactical details on vegetation fires and specific load configurations can be found in the dedicated article on mobile containers in wildfire operations.

Flooding and heavy rainfall events

Waterlogged ground, muddy flood embankment tracks, and inundated roads are the defining features of flood operations. Sandbags, dirty-water pumps, and generators must reach the embankment sections directly. Conventional transport trolleys with small swivel castors sink immediately into softened ground; off-road mobile containers with wide pneumatic tyres and high ground clearance cover significantly more distance. The essential prerequisite remains: the ground must still have sufficient bearing capacity for emergency personnel to stand on – once mud reaches above boot height, the use of manually operated transport systems is fundamentally limited.

Railway infrastructure and rail lines

Operations in railway tunnels or on open track are logistically extremely demanding. Long approach routes across ballast quickly exhaust breathing apparatus teams. Heavy hydraulic rescue equipment is barely moveable over ballast. The rail chassis kit (order no. 120154) solves this problem: it makes MUNK mobile containers rail-compatible for DB standard gauge track (1,435 mm gauge) and tram track (1,000 mm gauge).

Industrial sites and urban obstacles

High kerbs, cobblestones in historic town centres, deep gravel on construction sites, or debris following explosions all block standard swivel castors. Off-road undercarriages absorb impacts, protect sensitive equipment – drones, measuring instruments, breathing apparatus – and ensure low-vibration transport.

Both systems carry loads of up to 500 kg and use pneumatic tyres with a wheel diameter of 360 mm. The differences lie in flexibility, lifting function, and rail compatibility.

The Off-road suspension is the right choice when operational containers need to be equipped for standard off-road terrain and stepless height adjustment is not required. The Off-road system Premium suits units that want to attach a single undercarriage flexibly to different containers – and that need the rail chassis option or the ability to lift a sunken container.

Existing MUNK mobile containers do not need to be replaced. Both off-road systems attach to the container frame via a compatible mounting adapter set. Important: each adapter set is specific to one system only. For the new Offroad-System Premium, use the Offroad-System Premium mounting adapter set (order no. 120151); for the Offroad-Fahrwerk, use the Offroad-Fahrwerk mounting adapter (order no. 120251). The two adapter sets are not interchangeable.

The principle is the same in both cases: high-strength brackets are permanently bolted to the longitudinal frame rails of the existing mobile container – stainless steel for the Offroad-System Premium, aluminium for the Offroad-Fahrwerk. In day-to-day use, they do not interfere with the standard swivel castors or with loading onto the vehicle. In operation, the relevant off-road system is slid into the adapters and locked mechanically – tool-free, in just a few steps.

This is particularly relevant for local authority procurement: a single adapter set per container is sufficient. The off-road system moves from container to container as needed – saving costs compared to a complete solution per container unit. Fire brigades with mixed operational profiles can retrofit selectively without replacing their entire container stock.

Those procuring new mobile containers can order them directly from the factory with integrated off-road preparation via our mobile container configurator. The appropriate adapter set is then fitted at delivery – saving setup costs and ensuring compatibility from day one. For older container stocks, both adapter sets are available as accessories; the MUNK Rettungstechnik team advises which set is compatible with your containers and system.

What is the difference between a mobile container and a hook-lift container?

A mobile container is a compact logistics unit that can be moved manually or by a team – transported in logistics support vehicles or multi-purpose response vehicles, loaded via a tail lift, and moved by hand. A hook-lift container is a multi-tonne unit on a lorry chassis with a hook-lift system – deployed only by mechanical means; manual transport is not possible. For last-mile off-road logistics, only the mobile container is relevant.

Can a rail chassis be retrofitted?

Yes. MUNK offers two rail chassis solutions. Each is compatible exclusively with its own adapter set – they cannot be mixed. New solution for the Offroad-System Premium: the Rail Chassis Kit for Offroad-System Premium (order no. 120154). It attaches to the Premium Off-Road System Mounting Kit (order no. 120151). The kit covers tram track (1,000 mm) and DB standard gauge (1,435 mm), fits tool-free, and travels with the transport trolley. Existing solution: the Rail-mounted trolley set. This is a standalone system with its own adapter. It is not compatible with the Off-road suspension and its Off-road suspension mount (order no. 120251). The MUNK Rettungstechnik team can advise which solution is compatible with your mobile containers.

What to do if the container is stuck in soft ground?

The lifting units of the Offroad-System Premium can be fitted from the side even on a container that has already sunk in. The crank-and-spindle mechanism raises the container in a controlled manner – provided the ground still offers sufficient resistance for the spindle to engage and emergency personnel can stand securely. Where the ground has lost all bearing capacity, even the best off-road system reaches its physical limits. This tactical advantage when freeing a container from soft ground nonetheless sets the Premium system fundamentally apart from the Offroad-Fahrwerk.

Which surfaces does the system handle?

The 360 mm pneumatic tyres with aggressive tread pattern handle waterlogged meadow paths, wet grass, loose gravel, sandy ground, dense root networks, high kerbs, and ballast in track areas – in short, any surface on which emergency personnel can still stand and move safely. Once the ground loses all traction for people, the same applies to the undercarriage.

How is the Offroad-System Premium fitted?

Four steps: insert the lifting units into the pre-fitted mounting adapter set → fit the wheels → raise the container to the required ground clearance using the hand crank and spindle → lock the steering bar. No tools required. The fitting procedure also works on a sunken container.

What is the load capacity of the MUNK off-road systems?

Both systems – the Offroad-Fahrwerk and the Offroad-System Premium – are rated for loads of up to 500 kg. This allows the transport of portable pumps, power generators, fully loaded hose reels, or hydraulic rescue equipment.

Off-road mobile container logistics closes the tactical gap that even heavy all-wheel-drive vehicles leave open: the last 100 to 1,000 metres to the incident site. With the Offroad-Fahrwerk, we offer a permanent, proven solution for fixed operational profiles. The Offroad-System Premium – new at Interschutz 2026 – sets new benchmarks with stepless ground clearance, a lifting function for sunken containers, and an optional rail chassis kit. Anyone planning tomorrow's logistics today should be familiar with both systems.

For advice and individual configuration, the MUNK Rettungstechnik team is available directly.

Article last updated: June 2026