How to Unload a Shipping Container: Equipment and Methods

Container unloading looks simple until the container arrives and the forklift does not fit through the doors, the trailer is too high to reach, or the heaviest crate is at the back. The right equipment depends on three things: whether you have a loading dock, how the goods are packed, and how heavy the heaviest item is. This guide covers each case.

Know the Container

Standard 20 ft and 40 ft containers have a door opening of roughly 2.3 m wide by 2.3 m high. High-cube containers are about 30 cm taller, with a door height of roughly 2.6 m. Inside, the forklift has to clear the door frame and the roof with its mast lowered, and lift loads high enough to stack or clear the floor without hitting the roof.

Method 1: At a Loading Dock

With a dock and a dock leveller, the container floor is at warehouse floor height and a forklift drives straight in. This is the simplest method. The forklift needs a low lowered mast height to pass through the door and full free lift, meaning the forks can rise without the mast extending upwards. Forklifts set up this way are often described as having a container mast. Electric forklifts suit this work well where the dock is indoors.

Method 2: At Ground Level With a Ramp

Without a dock, a mobile yard ramp bridges the gap between the ground and the container floor while it is still on the trailer. The forklift drives up the ramp and into the container. Ramps have a rated capacity, which must cover the forklift and its heaviest load together, and the trailer must be secured so it cannot move. Check the ramp's rating plate before the first lift.

Method 3: Unloading From the Doors

If goods are palletised and near the doors, a forklift on the ground can sometimes reach the first pallets with its forks raised to trailer-bed height, then use extension forks or a pallet jack inside the container to bring the rest forward. It is slower and only works for lighter, well-packed loads, but it avoids the need for a dock or ramp.

When You Need a Crane Instead

To lift a loaded container off a trailer and set it on the ground, use a crane. Taking a container off a trailer is typical work for a 25 ton crane, sized by the container's weight and the radius from where the crane stands. A crane is also the answer for very heavy single items, such as machinery, that are too heavy for the container floor or the ramp to carry a forklift with the load.

Loose and Floor-Loaded Cargo

Cartons stacked loose on the container floor are usually unloaded by hand onto pallets at the doors, with a forklift taking the full pallets away. Planning the labour matters more than the machine here. If you receive loose cargo regularly, ask your shipper about palletising or slip sheets.

What to Tell Us Before We Send a Forklift

• ✓Container size: 20 ft, 40 ft or high-cube
• ✓Dock, ramp or ground level
• ✓How goods are packed: pallets, crates, loose cartons or long items
• ✓Weight and size of the heaviest item, and where it sits in the container
• ✓How many containers, and how often

For local delivery details, see our pages for Jebel Ali, KIZAD and Khalifa Port, Sharjah Industrial Area and forklift rental in Dubai.