A microcomputer-aided design (MICROCAD) system is presented for interactive design of connections in steel buildings made of standard rolled I-sections. Design of different connections is based on the American Institute of Steel Construction specification. Connecting elements may be plates, angles, or T-sections. Connectors may be bolts or welds. The MICROCAD system can display/plot any isometric view of the connection plus the orthographic views, i.e. front, side, and top views. Program structure and graphic algorithms for the MICROCAD system are presented in an accompanying paper. In this paper applications of the MICROCAD system for design of bolted and welded connections are presented. Different menus available to the user are discussed. Microcomputer graphics for displaying the orthographic views with dimensions and designations, and isometric views are presented. This MICROCAD system can be used effectively for practical design of connections in steel buildings