Simply pick column width from the drop-down menu (3,4,5, 3-3/16,4-3/4 inches). Enter 1st bay clear span beam dimension (e.g. 96”), how many bays of that size (e.g. 15) and it will display the out to out column dimensions of the row. The App allows for 3 different clear span bays to be calculated. For example, a bridge bay at 144” clear span and/or a ½ bay at 48” can be added to the calculation. A simple must have App for material handling sales inside and outside, consultants, warehouse managers, and others.