In this short Steel Joist Institute (SJI) video, we explain the 100 Pound Rule and 500 Pound Rule, which provide guidance for handling nominal concentrated loads without requiring additional struts.

Learn how load magnitude and location—particularly in relation to panel points—affect whether reinforcement is necessary. The video also highlights key limitations, including why these rules cannot be combined.

Watch to better understand how these provisions can simplify design and reduce unnecessary field modifications while maintaining proper load considerations.