If you are new to buying boxes it is important to know a few things.
Measure Boxes the Right Way!
Length x Width x Height
The longer side of a box is the length. The shorter is the Width. The spine of the box is the height or depth.
"L" Always measure a box by the length first. This is always the horizontal measurement of the assembled box front.
"W" The width is the measurement of the box from front to back. This is always the sides of the assembled box.
"H" The height or depth is the last measurement. It is the vertical measurement of the assembled box. Also, top to bottom as it sits.
The strength of a box is commonly measured in Edge Crush (ECT), Gross Weight Limit (lbs), and Bursting Strength (Test). This information lets you know how much weight can be put into each box and how much weight can be stacked on the boxes. Every box made in North America has a stamp on it that states the pertinent information for each carton. Test is an industry term for the bursting strength of the box, as measured in how much weight it can hold. Weight is the actual pounds a box can safely contain without damage. Edge Crush Test (ECT) is the pounds per square inch strength. Here is a conversion chart so you can compare the scale for each measurement:
1. Bursting Strength (MULLEN)
|2. Maximum Weight Limit||3. Edge Crush Test (ECT)|
|125 Test||20 Lbs||23 ECT|
|150 Test||35 lbs||26 ECT|
|175 Test||50 lbs||29 ECT|
|200 Test||65 lbs||32 ECT|
|275 Test||95 lbs||44 ECT|
|350 Test||120 Lbs||55 ECT|
|1. Bursting Strength (MULLEN)||2. Maximum Weight Limit||3. Edge Crush Test (ECT)|
|200Test||80 Lbs||42 ECT|
|275 Test||100 lbs||48 ECT|
|350 Test||120 lbs||51 ECT|
|400 Test||140 lbs||61 ECT|
|500 Test||160 lbs||71 ECT|
|600 Test||180 Lbs||82 ECT|