This portion of the chapter focuses on the changes to the program interface made primarily to facilitate the use of refined methods of analysis in the computation of Live Load Distribution Factors. You will notice that in many screens in Precast/Prestressed Girder, to ease the users burden of inputting additional data and to guide them through the user interface, we now grey out or make unavailable data input fields unrelated to the user-selected method of Live Load Distribution Factor computation. Please pay careful attention to this methodology as you read the following topics.