40ft New Double-Door Container

excl. VAT · incl. VAT: €5,710.81

A container with no back wall: what a 40ft new double door container really is

Every ordinary freight container has one end you can open and one end you cannot. A 40ft new double door container removes that second end and replaces it with a full set of cargo doors, which is why the type is also called a tunnel container. The recorded internal length is 1203.20 cm, the internal width 235.20 cm and the internal height 239.50 cm, giving 28.37 m² of floor and 67.01 m³ of volume. Both apertures are recorded at 234.01 cm wide by 227.99 cm high. That symmetry is the whole point of the design. It changes how goods move through the box, and it changes what the box is doing structurally, which is why it deserves to be understood rather than simply ordered.

Recorded specification

Taking the tare off the maximum gross leaves 26,480 kg of carrying capacity. Note the tare of 4,000 kg: a second door end is heavier than a corrugated blind end, because the frame section, the header, the sill and the door leaves with their hinges, cams and locking bars all weigh more than a single steel panel. That weight is not waste, it is what keeps the open end from becoming a weak point.

Load flow, the real argument for doors at both ends

First in, first out

A single ended box is a stack. Whatever went in first comes out last, and if it is stock with a date on it, that is a problem you manage with paperwork and hope. With doors at both ends the box becomes a queue instead. Goods go in at one end and come out at the other in the order they arrived. For consumables, chemicals with a shelf life, seasonal stock, spares with a service interval or anything that must rotate, that single change removes a whole category of daily handling. It also removes the practice of unloading half a container onto the yard to reach one pallet at the back, which is where damage and lost time usually come from.

Shuttle loading and working from both ends

Loading a forty foot box from one end means the last pallets are placed twelve metres from daylight. The forklift travels the full length each time, the visibility is poor and the cycle time climbs steadily as the box fills. Two apertures let two crews work towards the middle at once, which is close to halving the working depth for each of them. Even with one crew, the ability to load the far half from the far door and then close it and finish from the near door reduces travel considerably. Where a container is being used as a buffer between a production line and a despatch bay, one end can face the line and the other the bay.

Drive through and walk through

With a clear opening recorded at 234.01 cm wide by 227.99 cm high at both ends, a tunnel container can serve as a covered pass through rather than a dead end. Small plant, mowers, sweepers, compact tracked machines, quads and narrow lift trucks can be driven in one end and out the other rather than reversed the full length. That is a genuine safety improvement, since reversing blind down a long steel box in poor light is one of the more avoidable risks on a yard. The same logic applies to people: as a store, a workshop, a drying room, a wash down bay or a covered walkway between two working areas, a through route is simply better than a cul de sac.

Long loads and awkward items

Anything long is easier to handle when both ends open. Pipe, timber, profile, scaffold tube, ladders, ducting, rolled goods, masts and long crates can be fed in from whichever end has the room, which matters when the container is parked against a fence or a building and only one end has space in front of it. Loading from either end also gives more freedom in how the load is built, because you are not forced to work from the deepest point outwards. Do keep the door aperture in mind rather than the internal height: at 227.99 cm the opening is lower than the 239.50 cm internal height, and anything sitting on forks is raised further still.

What a second door end does to the structure

Racking and bracing

A shipping container is a monocoque. Its stiffness comes from the corrugated panels working together with the frame, and the closed end wall of an ordinary box is one of the main panels resisting racking, the parallelogram movement that puts a twist through the frame. Replace that panel with an opening and the resistance has to come from the corner posts, the door headers and sills, the roof rails, the bottom rails and the floor structure. Builders compensate with heavier frame sections at the door ends, which is visible in the recorded tare. What it means for you is practical rather than alarming: level bearing under all four corner castings matters more on a tunnel container than on a standard one, because there is less panel stiffness available to absorb an uneven surface. Put the unit on concrete, sleepers or load spreading pads, check it is level, and check the doors close on both ends before the delivery vehicle leaves.

Two further consequences follow. Lifting and stacking should always be at the corner castings, never by slinging around the body. And if you plan later modifications, remember that cutting a personnel door, a window or a vent into a side panel removes shear area from a structure that has already given up one panel. Modifications of that kind should be planned against the specific unit rather than assumed to be harmless.

Sealing and security

Two door ends mean twice the sealing perimeter and twice the door gear. Gaskets are the part that decides whether a container stays dry, so both sets need to seat cleanly and both sets need occasional attention. Keep the cams and cam keepers greased at both ends, and be aware that a hinge left unlubricated on the end you never open is exactly the hinge that will seize. On security, a box is only as strong as its weaker end. Decide before ordering how each end will be secured, ask what locking arrangement is fitted, and if a lock box or a high security padlock arrangement is required, ask whether it is fitted to both ends or only one.

Siting and access

The advantage disappears if the unit is placed where only one end is reachable. Plan the position so there is standing and turning room at both ends, and remember that door leaves swing wide and need clear ground through their arc. If the container is to be used as a drive through, the approach and exit both need a firm surface, and it is worth checking the sill height against whatever will be driven in. Where two containers are set end to end, the tunnel type lets you create a continuous run, which is a common arrangement for long term storage of long goods.

Buying new

Ordering a 40ft new double door container rather than a used one buys you consistency at both ends. Door gear that has never been forced, gaskets that have never been crushed, a clean floor and an interior with no residue from previous cargo. That matters more on this type than on a standard box, because a used tunnel container has twice as much door hardware that could have been damaged in handling, and door alignment is exactly the thing that is expensive to put right afterwards. A new unit also gives you an unmarked shell if the container will be lined, insulated, branded or fitted out.

When a tunnel container is the wrong choice

If the box will stand against a wall, in a row, or in a corner where only one end is ever accessible, you are paying for an aperture you cannot use and accepting a second sealing perimeter to maintain for nothing. If you need the maximum number of internal fixing points and full length racking against a solid end, a single ended box gives you more to work with. And if the load is dense enough that weight rather than access is the constraint, the argument for two ends weakens considerably. Where access, rotation and flow are the constraint, which is most of the time in storage and light industrial use, the case is a strong one.

What is the difference between a 40ft new double door container and a standard one?

A standard container has a corrugated blind end and one set of doors. This type has full cargo doors at both ends, each recorded at 234.01 cm wide by 227.99 cm high. That allows goods to pass through rather than in and out of the same aperture, which supports stock rotation, loading from both ends and driving small plant straight through.

Is a tunnel container weaker than a standard container?

It is built differently rather than simply weaker. A closed end panel contributes stiffness against racking, so with two door ends that job passes to the corner posts, headers, sills, rails and floor, and builders use heavier frame sections to compensate. In practice it means level bearing under all four corner castings matters more, and lifting should always be at the castings.

How much can it carry?

The recorded maximum gross weight is 30,480 kg and the tare is 4,000 kg, leaving 26,480 kg of carrying capacity across 28.37 square metres of floor and 67.01 cubic metres of volume. The tare is higher than a blind ended box because the second door frame, leaves, hinges and locking bars weigh more than a single steel panel.

Can I drive a small machine through it?

Both openings are recorded at 234.01 cm wide by 227.99 cm high, so compact plant, mowers, sweepers, quads and narrow lift trucks may pass through depending on their own dimensions. Check the machine against the aperture, check the sill height, and make sure the approach and exit surfaces are firm. Driving through avoids reversing the full length of the box.

Does having two door ends make it harder to keep dry and secure?

There is twice the sealing perimeter and twice the door gear, so both sets of gaskets and both sets of cams need occasional attention, particularly on the end that is rarely opened. On security, the unit is only as strong as its weaker end, so decide in advance how both will be locked and ask what locking arrangement is fitted to each end.