Kalmar DCG330
A heavy industrial forklift built for handling loaded shipping containers and other massive loads at ports and intermodal yards, at nearly ten times the capacity of a typical warehouse forklift.
Overall height, mast lowered (sources range 3.4 – 7.0 m by mast option): 4.5 m — about 2.5× an average adult's height (1.8 m). The machine is always drawn at the same size here; the human figure is what actually scales.
01Overview
A heavy industrial forklift built for handling loaded shipping containers and other massive loads at ports and intermodal yards, at nearly ten times the capacity of a typical warehouse forklift.
02Purpose
Built to lift what a standard warehouse forklift never could — a fully loaded shipping container — without needing a dedicated overhead crane at every terminal.
03Historical Development
Kalmar's heavy forklift range grew directly out of the container-shipping boom of the late 20th century: standard forklifts topped out at a few tonnes, nowhere near enough to lift a fully loaded ISO shipping container, so an entirely separate class of purpose-built heavy forklift emerged around ports and rail yards. The DCG180–330 series sits at the top of that range, covering the heaviest loads a mast-type forklift, rather than a dedicated container handler, is asked to lift.
04Core Components
- Reinforced mastA heavy-duty lifting mast engineered for loads many times a standard forklift's rating, without the excessive flex that would make precise container placement impossible.
- CounterweightA substantial rear counterweight balancing the load moment of a multi-tonne container carried well forward of the front axle.
- Variable hydraulic lift systemAdjusts lift speed and force through the stroke, rather than applying constant hydraulic flow regardless of load.
- Selectable drive modesOperator-selectable modes tuned for precision spotting versus faster yard travel between stacks.
05How It Works
A hydraulic lift cylinder raises the mast's carriage and forks, with lift speed and hydraulic pressure managed by a variable system that trades speed for smoother, more controlled placement as a load nears its final position. The rear counterweight, positioned well behind the drive axle, keeps the whole machine stable even with tonnes of container cantilevered out in front, exactly the same lever-balance principle behind every forklift regardless of size, just scaled to loads no ordinary warehouse machine could approach.
06Engineering Principles
The mast's lift cylinder is a direct, large-scale application of hydraulic linear force, sized for loads many times a standard forklift's.
HydraulicsPascal's LawThe same pressurised-fluid principle behind a small warehouse forklift scales up here simply by increasing cylinder bore, following Pascal's Law directly.
MechanicsMechanical AdvantageThe rear counterweight and mast geometry together form a lever system balancing a forward, off-centre load against the machine's own weight.
07Performance Characteristics
| Lift capacity | 18 – 33 t (model-dependent) |
| Typical duty | Loaded ISO shipping containers |
| Primary environment | Port terminals, heavy industrial yards |
08Notable Examples
- Container terminals worldwideHeavy forklifts in this class handle loaded containers wherever a dedicated reach stacker or crane isn't already positioned for the job.
09Interesting Facts
- A single loaded 40-foot shipping container can weigh over 30 tonnes — well beyond what any warehouse forklift could safely approach.
- Heavy forklifts like this trade the reach and stacking height of a dedicated container handler for tighter manoeuvring in congested yards.
- Multiple drive-mode settings let the same machine prioritise fuel efficiency on long yard runs or maximum control during a delicate stacking placement.