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Double wall boxes, often referred to as heavy duty cartons, are an ideal choice for shipping or storing heavier industrial items. With 3 layers of liners and 2 layers of fluting, double wall board is more durable than the single wall board. It offers greater rigidity and a higher level of protection. 

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With extra support and stability double wall cartons are a better option for storage than single wall cartons. 

The perfect size box should be just slightly bigger than the item being shipped, just enough to accommodate some protective material around the product, to prevent it from getting damaged during storage or transportation. Keep in mind it is best to use the smallest box you can work with to ensure shipping costs are kept to a minimum.

  • Choose from our stock sizes or create that perfect custom size.
  • Available in Kraft and Oyster (White).
  • Each type of corrugated cardboard box is available for custom printing.
  • Most commonly double wall boxes are manufactured with glue, however, stapled cartons are available for heavy duty applications.
  • Multi depth cartons available - with creases at intervals just simply cut the box to your desired height, save on shipping costs and inventory space. 

Don't have that perfect size box on hand but really need to ship that item immediately? Customize your carton size with a carton reducer tool. 

Visit our knowledge Centre for more information:


What is the Most Common Double Wall Carton Material?

The most common double wall carton material is 42ECT with BC fluting, this board grade can be used to create many different box styles, generally being used for larger and heavier parts. However if the box is going to be exposed to extreme handling conditions heavier board grades are available in double wall materials without having to step up to a triple wall box.

Edge crush test (ECT) describes the weight capacity the corrugated cardboard can safely withstand during stacking and palletization without deforming.  Double wall cartons are available in 42ECT, 48ECT and 51ECT.

The flute is the layer in between the cardboard liners. There are various sizes of flutes. Larger flute provides more protection as it has the ability to absorb more shock. Short flutes have a greater crush resistance. B and C flutes are the most commonly used flutes in double wall cartons. For more heavy-duty boxes or containers flutes can be combined, for example A/C, B/C, B/E.

Visit our knowledge Centre for more information:


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Product description and specifications content is accurate and true to the best of SmartShield Packaging's knowledge.
Style, colour or size in some pictures may not depict product exactly.