Abstract
At Adelphi University (AU), the circulating collections of two satellite libraries needed to be merged into the circulating stacks of the main campus library. However, there were no architectural shelving blueprints to use to determine the amount of available shelf space in the main stacks, and no accurate, current information on the size of the collections to be merged. With Excel, the borders function was used to create stack blueprints, measure the amount of shelf space available, and determine where shelves could be added or built. Classmark counts for the three collections were obtained from the library OPAC, and average classmark widths from library literature were used to obtain measurements of each classmark. This shift and merger was successfully completed using the methodology described. In addition, the blueprints were then modified to create floor plans on each stack level.