The Steel Joist Institute (SJI), a nonprofit organization of active joist manufacturers and other individuals and entities connected to the industry, was founded in 1928 to address the lack of uniform joist standards within the industry. SJI continues to maintain the standards for steel joist construction as a Standard Developing Organization (SDO). In addition, SJI provides design tools, such as the Roof and Floor Bay analysis, to assist the structural engineer with utilization of steel joist products. SJI also provides educational opportunities for construction professionals utilizing a library of printed publications, continuing education live and recorded seminars, as well as, assistance in identifying existing joists in buildings undergoing retrofit.