Using Heavy-Duty Boxes for Moving

U-Haul heavy duty moving boxes.

When it comes to packing for moving, shipping, or storage, selecting cardboard boxes that provide optimal protection is crucial. That's where U-Haul Heavy-Duty Boxes come in. These versatile moving boxes offer the same advantages as our standard moving boxes, but with more durable construction.

Not sure if heavy-duty boxes are right for you? This guide will tell you everything you need to know about these strong packing tools so you can choose the boxes that best meet your needs.

Close up image of a double wall box.

What are Heavy-Duty Boxes?

Heavy-duty boxes – also called double-walled boxes – are cardboard boxes that are made with two layers of corrugated cardboard, providing them with double the strength and durability of standard cardboard boxes that only feature one layer.

This added durability makes them perfect for packing fragile items that require extra protection, as well as large and bulky items that need a sturdier box. Additionally, double wall boxes have puncture-resistant side walls, making them the top choice for shipping.

How Strong is Double-Walled Cardboard Vs. Single?

The short answer: double-wall cardboard is much stronger than standard, or single-wall cardboard. For example, our Large Heavy-Duty Box holds up to 80 pounds, while the standard Large Moving Box holds up to 65 pounds. The heavy-duty box also has a 48 edge crush test (ECT), which refers to stacking strength. For comparison, the standard box only has a 32 ECT. So, if you're looking for some serious cardboard muscle, our heavy-duty boxes are the way to go!

An illustration of single wall cardboard vs. double wall cardboard.

To get a better idea of how this works, imagine the walls in your home, but with twice the insulation and structure. Or think of how double-pane windows prevent outdoor temperatures and UV rays from entering your home. An extra layer can go a long way toward protection and insulation!

Heavy-Duty Box Sizes

U-Haul heavy-duty boxes come in four sizes (like the standard boxes) to provide as much flexibility as possible when it comes to packing, shipping, and storing your belongings.

Available sizes:

  • Small: 16-3/8" x 12-5/8" x 12-5/8" (W x L x H), 1.5 cu. ft.
  • Medium: 18 1/8” x 18” x 16” (W x L x H), 3 cu. ft.
  • Large: 18" x 18" x 24" (W x L x H), 4.5 cu. ft.
  • Extra-Large: 24" x 18" x 24" (W x L x H), 6 cu. ft.

U-Haul heavy duty box sizes.

Looking for the best boxes for shipping?

All U-Haul heavy duty boxes meet UPS, USPS and FedEx shipping requirements, are 100% recyclable and reusable, and feature perforated handles for easier carrying and loading. If you’re looking for reliable shipping boxes, look no further!

What Are Heavy-Duty Boxes Used For?

There are many ways to use heavy-duty boxes. Here are some popular ways U-Haul customers use them to Make Moving Easier®.

  • Carrying Multiple Items: A sturdier box allows you to fit more items in each box. This reduces the number of boxes needed to complete your move, saving you money and space.
  • Packing Fragile Items: By combining heavy-duty boxes with packing supplies like Packing Paper, Cushion Foam, or Packing Peanuts, you can safely move your most fragile items.
  • Hauling Heavy Items: Using heavy-duty boxes to move your bulky items minimizes the chances of your boxes collapsing, tearing, or splitting at the bottom and causing damage to your items.
  • Storing Valuable Items: Heavy-duty boxes are the best boxes for long-term storage of valuable items like small appliances, electronics, kitchenware, book and vinyl collections, and more.
  • Shipping: Given the strength of double-wall cardboard vs. single, we recommend using double wall boxes for shipping to supply better protection against side wall punctures and other damage. Learn more about choosing the right boxes for shipping.

Where to Buy Heavy Duty Boxes

You can find heavy-duty boxes at most U-Haul locations. If your local U-Haul doesn't carry heavy-duty boxes, you can order them online. When you order online, you have the choice of same-day delivery or free in-store pickup, ensuring that you get the moving supplies you need, exactly when you need them.

Order Your Boxes

Packing Made EasierSM

Ready to see why U-Haul is the best place to get boxes for moving? Easily order moving boxes – including double wall boxes and other essential moving supplies – online today! Get your moving boxes delivered the same day or pick them up in-store for free on your schedule.

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