Stacking Shipping Containers
ISO shipping containers are designed to be stacked in order to maximise space on cargo vessels. This is due to the structure of the container: the top and bottom rails of shipping containers don't actually meet! Instead, all the weight is carried through the four corner posts, and containers are locked in with twist locks whilst in transit. This is one of the main reasons why shipping containers have to conform to standard dimensions.
The reason why containers are stacked for storage reasons is to maximise space. Stacking containers is a great way to utilise and increase the storage capability of your site if the ground footprint is limited. Most commonly seen in shipping container depots, and even in self-storage container yards, stacked shipping containers are a very useful feature when considering storage options.
Twist Locks
Twist Locks are essential for stacking as they ensure the corner posts are locked together. This is in order to stop the containers from moving independently of one another, and to ensure the top one doesn't fall, for example, in extreme weather conditions. Another method to ensure the container is secured when stacked, it to employ a welder on site to spot weld the containers together via the corner posts. This is best done if the containers are intended to be a permanent structure.
Cut Down Containers
We specialise in cut down shipping containers for storage, modifying the length to suit individual requirements by cutting down from 40ft or 20ft containers. In most cases, this means that you are unable to stack these containers, as the corner posts are typically removed during the process. If you do need to stack containers which are cut down in length, we are able to help! We have a process called "Cut and Shut" where we retain the corner posts allowing for the units to be stacked on top of each other. Usually, you would require the units to be exactly the same size to ensure that the corner posts rest exactly one on top of the other to support the weight of the top container. However, if you need a smaller unit to sit on top of a larger one, we can also add a welded "goalpost" inside the container, with additional corner castings at the required length along the top and bottom, to support the top unit. Our sales team can always help if you have specific requirements in mind.
Staircases
Once you've stacked your containers, you need a way to access the top one! Containers Direct can provide specialised container staircases, complete with platform, so you can access your top level storage space. These units need assembling and bolting, or welding, to brackets to keep them secure once on site.
Doors in the side?
A common request to make it easier to access the storage on the top level is to have a set of doors in the side of the container. These can be instead of, or in addition to, the original container doors. The staircases provided can be altered to allow for side entry if required.
Delivery
Most hauliers will add on an additional delivery charge for stacking units, which can affect the overall delivery rate. This is due to the additional time required on site to ensure the containers are directly on top of each other and level.
Request a Quick Quote!
Contact our sales team for your no obligation quote, including delivery!Testimonials
As a long established and reputable shipping container company, we want to instil confidence in our customers that we can deliver on our promises, and provide high quality products and service.But don't just take our word for it, see for yourself what our past and present clients have to say about Containers Direct.
"This is our 2nd container ordered from you guys. Cory has always been very helpul, quick at getting us the information we need and getting the order over the line and delivered."Scitek Consultants Ltd
15th August 2025
order - a New 'Once-Used' 20ft Container
"Cory (Sales) was very helpful, friendly and prompt with responses to my questions about the container. Steve (Delivery driver) contacted us on the delivery day with an estimated arrival time and was equally friendly and helpful during the delivery. Excellent service throughout."Sue
14th August 2025
order - a 3m Flat Pack Store Container
"Communication with Cory from the off was great! I was made aware at every stage of the process what was happening and when. We paid extra for a AM delivery which came on time and was a smooth and simple process. Thanks for all your help!"Kayleigh - Best Day Ever Venues
13th August 2025
order - a Used 10ft Container
"Communication was excellent from start to finish and the transport company that you used were brilliant. The two drivers who came were really helpful and very good at what they do."Stephen Tweddall
12th August 2025
order - a CarTainer 2016 (20ft x 16ft Double Container Garage)
"Cory was great. We ordered 2 containers within a week of each other and he managed to get the second loaded with the first delivery which means that these will be ready for use wen school returns. The delivery driver is lovely, very friendly and polite. I have recommended you to other services within our group should they need a container."Nicola Toole - Aurora Woodlands School
12th August 2025
order - a 3m Flat Pack Store Container
"Neil and the team are great we have over 10 flat pack containers on site now and will definitely get more. I always recommend to other schools. Steve the delivery driver has delivered to us many times always very friendly and polite, nothing is ever to much of a ask."Samuel Cody School
11th August 2025
order - a 3m Flat Pack Store Container
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Committed to Quality
We are ISOQAR Approved; certified to the ISO standard relating to Quality Management Systems, demonstrating our Company's commitment to quality. We are also members of MakeUK who champion and celebrate British manufacturing and manufacturers, and member of the Container Self Storage and Traders Association; an international organisation representing the interests of Container Self-Storage Operators, Traders and Innovators.
ISO Cert No. 13586-QNS-001
ISO 9001:2015
