Composite steel and concrete lateral force resisting systems are not commonly used as the primary lateral force resisting system in regions of high seismicity. This presentation discusses one particular type of composite steel and concrete lateral force resisting system, the Composite Partially Restrained Moment Frame (C-PRMF). ASCE 7 permits the use of this system in Seismic Design Categories A through D. The moment frame is created by using the composite floor slab and a seat angle attaching the bottom of the steel beam to the steel column. As part of the presentation, a worked example of this system will be shown.

Learning Objectives:

Upon completing this course, you will be able to:

• Learn about the composite partially restrained moment frame (C-PRMF);
• Learn loads and load combinations for the design of a C-PRMF system;
• Learn the special aspects of analysis for partially restrained buildings; and
• Learn the basic code-required checks for a C-PRMF system.