This document contains menus and diagrams for S2D, a software for steel structural design. It includes a visual table of contents, file menu, view menu, windows menu, and help menu. It also contains use case and activity diagrams that show the user accepting inputs, the software computing an answer by checking if members are greater than or less than 50, producing output, and saving. The document is the thesis of Jane G. Macasa and Nona Theresa M. Colico, presented to the faculty of computer science at New Era University in partial fulfillment of a Bachelor of Science in Computer Science degree.