This module is a 3rd party module for Übercart allowing to calculate shipping cost based on total order weight or total order price, and managing ranges.
You can define weight ranges: a lower weight, an upper weight and a cost.
An order which total weight is greater of equal than a range's lower weight and lower than the same range's upper weight will get the shipping cost corresponding to this range.
The outdated 6.x-2.0 version has many bugs that are being working on. Please use the dev version meanwhile.