When selecting corrugated boxes for shipping, packaging, and storage, you might be unfamiliar with the terms used to describe each box’s thickness. One particular term, ECT, is used to describe corrugated material with varying numbers in front of it. But what does this mean? What is ECT, and how does it differ from weight-based measurements? How do you know what ECT or weight limit is right for your packaging? Packaging HERO has the answers.

What is ECT?

Simply put, ECT stands for Edge Crush Test. This is a type of measurement that tests just how much weight can be stacked on top of a box without the edges sustaining damage. This is accomplished by applying compression to a small segment of corrugated board between two plates until a peak load is established. The number you’ll see in front of the ECT on corrugated materials therefore stands for its rating, with 32 being common for single-wall corrugated, 44 for double-wall, and 60 for triple-wall being standard as well.

What does this mean, exactly, though? In essence, a 32ECT single-wall corrugated box can withstand 32 lbs. of pressure on its edges. This type of test is ideal for measuring package strength for B2B shipping, especially if you plan to use a palette or stack multiple packages on top of each other.

What Does 200# Mean?

So now that we understand what ECT is, what does 200# mean for the strength of a corrugated box? 200#, or 200 lbs., is a similar strength measurement that is accomplished through different means. These measurements utilize the Mullen burst test. This test is used to determine the amount of pressure that a box can withstand before it breaks or ruptures. While ECT rating is determined by applying pressure to the cardboard’s edge, the Mullen test places weight directly upon the surface of the cardboard, applying pressure until it bursts. Corrugated with a 200# rating means that it can withstand 200 lbs. per square inch before collapsing.

Which Is Best for My Packaging?

Given that ECT is through different tests like the 200# Mullins test and burst tests, it’s hard to use one to measure the other. While each number may say similar things about the strength of the corrugated material, it should not be assumed that a 32ECT corrugated box can withstand 200# or vice versa. Instead, it’s important to apply each measurement to a specific use case scenario.

When measuring the strength of a package for its ability to withstand pressure upon a palette, ECT is the ideal measurement. This is due to the fact that the edges of the box support the weight of the other packages and materials placed on top. 32ECT packaging is typically lightweight, cost-effective, and environmentally friendly, though it is not quite as strong as 200# corrugated.

Meanwhile, 200# corrugated is perfect for shipping heavier items or dense packaging. The added protection prevents the package from bursting or collapsing, and 200# represents a reliable choice for businesses that want to confirm the safe delivery of their products.

Fortunately, at Packaging HERO, we offer the best quality at the best prices available in bulk, meaning you can maximize your packaging needs. Contact us today for more information or create an account for 24/7 access and on-demand packaging shipments.