Did you ever notice that circle on the bottom of corrugated boxes? That's the box certification. It includes:

* the name of the manufacturer of the carton (outside ring)

* whether the box is SINGLEWALL or DOUBLEWALL (one layer of corrugate or two)

* the type of test the box has undergone to test its strength (edge crush or bursting)

* weight it can withstand per square inch

* the maximum size of the box (length x width x height)

* gross weight limit (maximum weight you can safely load into the carton)

In general, there is a distinction between shipping boxes and moving boxes. The Edge Crush Test usually identifies a moving box, but if used according to the remaining specifications on the seal, ECT boxes can make suitable shipping boxes.

Be sure to use the correct box for shipping your items. If you have any questions about proper packaging techniques and products, visit your local The UPS Store where the packaging experts can advise you or pack your items for you. If you use the wrong carton for the product and there is damage to the item and a UPS investigation determines that you used an incorrect box or packaging material for the shipment, the claim will be denied.