Our Story

The Steel Joist Institute (SJI) was founded in 1928 to address the lack of uniform joist standards within the industry. We are a nonprofit organization of active joist manufacturers and other individuals and entities connected to the industry. Today, the Institute continues to maintain the standards for steel joist construction. In addition, the SJI provides educational opportunities for construction professionals utilizing a library of printed publications, design tools and live and recorded webinars. We also offer assistance in identifying existing joists in buildings undergoing retrofit.

140 W. Evans Street
Suite 203
Florence, SC 29501
Phone: (843) 407-4091

J. Kenneth Charles, III

J. Kenneth Charles, III

Managing Director

Stay Informed

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Applications of Steel Joists

View projects featuring steel joists, Joist Girders and composite steel joists.

SJI Resources

The Steel Joist Institute offers a robust library of articles, publications, webinars and design tools to assist you in your next project.

Signing & Sealing

SJI’s provides a position paper to avoid both the misuse of the joist engineer’s professional seal and clarify the responsibilities of the Design Professional of Record.

Environmental Product Declaration (EPD)

With more than 85% of steel used in production of steel joist products in North America being recycled, steel is the leading material for safe, sustainable construction. The EPD provides the merits of sustainability for steel joist construction