Structural Calculation - 3EB computes earth loads on concrete pipe in accordance with the methods presented in the Concrete Pipe Design Manuals of the American Concrete Pipe Association, the Ontario Concrete Pipe Association and Tubecon. 3EB analyzes underground pipelines for standard installation conditions, trenches, embankments, and jacked and tunneled pipe. Loads are derived using the indirect design method that relates the supporting strength of the buried pipe to the strength obtained in a Three-Edge Bearing test (thus the 3EB acronym) through the use of bedding factors. The program analyzes all standard live loads such as aircraft and railroad loadings, as well as AASHTO and Canadian truck loads.