Allow products to have multiple shipping dimensions because many items ship in more than just one box. This feature is necessary in order to capture actual shipping cost.

For example, widget A is a large item and ships in two separate boxes:

Box 1: 56 LBS and 24 x 24 X 12
Box 2: 48 LBS and 12 x 6 x 20

Some products ship in more than 2 boxes.