These strong & sturdy extra heavy duty boxes from Kite Packaging are a popular alternative to triple wall boxes because they're lighter, easier to handle, and more cost-effective.
- Extra strong for transporting heavy items
- Up to 85% recycled content and recyclable
- Maximum load, Edge Crush Test and Box Compression Test values printed on small flap
- Technical drawings and other data are provided for each size; click the 'more info' link to view
- Please note: These boxes are subject to a manufacturing tolerance of +/-10mm
Not sure which box is right for you? Contact our experienced team today for recommendations.
Extra heavy duty boxes
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About Heavy-Duty Cardboard Boxes
Strong Cardboard Boxes for Heavy Items
Our strongest, sturdiest corrugated boxes are designed for heavy goods, providing maximum protection.
Whether you’re moving house and looking for reliable removal boxes or shipping high value items, our extra heavy duty cardboard boxes will more than deliver on the promise of providing the right protection.
We have a wide range of sizes suitable for engineering equipment, automotive parts, electronics equipment, machined parts, hydraulic components and much, much more. From large cardboard boxes up to 1,200x600x600 mm to our smallest 180x180x180 mm boxes, there’s a solution for every packaging need.
Extra Heavy Duty Boxes Testing Procedures
We’ve made it easy to access all the details you need to select the right box. The 'Product' tab on the left contains the products table, which highlights the key technical specifications of each box, such as:
Maximum load:
This is the maximum weight that the box can support without the sides buckling.
Edge Crush Test (ECT):
This measures the top to bottom compression strength of the board. It gives information on the ability of a particular board construction to resist crushing from a laboratory test.
Box Compression Test (BCT):
This measures the compression resistance, shape change and stacking capability of the carton. The BCT of a corrugated box is the maximum force sustained by the box during compression and is an indication of the stacking resistance of the box during storage and transport.
You can find the measurements of each box by clicking the 'More Info' button on the product table. External dimensions are especially important for exporting, as they affect shipping costs.
If you need more information about our extra heavy-duty cardboard boxes or anything else in our range, our sales team is here to help!
Frequently Asked Questions
Are Heavy Duty Boxes Sustainable?
Made with up to 85% recycled materials, these packaging boxes are fully recyclable and widely kerbside recyclable, ensuring convenient and responsible disposal for the end consumer. This helps businesses to remain environmentally friendly whilst packing and shipping items—without compromising on quality or performance.
How Much Weight Can You Put in a Cardboard Box?
This can vary depending on several factors, but mostly boils down to the strength of the box and whether it is extra heavy duty, double-walled, or single-walled. When packed with the appropriate void fill and cushioning protection, our extra heavy-duty boxes can support heavy freight, with the smallest supporting goods of up to 111kg and our extra-large heavy-duty cardboard boxes carrying a maximum load of 472kg.
What is the Difference Between Heavy Duty and Double Walled Cardboard Boxes?
The main difference is in their strength and what they’re best used for. Double walled cardboard boxes are made with two layers of fluted cardboard, making them strong and great for heavier or fragile items. They’re a step up from single wall boxes but still lightweight and cost-effective.
Heavy duty cardboard boxes are also double walled and made with two layers of fluted cardboard, but they're much stronger than standard double walled boxes. These boxes are designed for especially heavy or large items, like machinery or bulk goods.
