There are two weights displaying on the report sheet. The first is in Column M and is the Weight (length X unit weight). For this calculation, the spreadsheet takes the length of the member and multiplies it by the weight per unit length. For example, if you have a 10–foot beam and the unit weight is 45 pounds per foot, then the weight in Column M is 450 pounds. In Column R, the weight (volume X density) is calculated. The volume takes into account all copes, cuts, holes, and so forth. The density comes from the report component data and is the density of the material. The value in Column R is almost always less than the value in Column M.