Understanding Substantial Structural Damage in the International Existing Building Code

The document provides detailed information on Substantial Structural Damage (SSD) within the International Existing Building Code (IEBC). It explains how the SSD concept is used within the IEBC, particularly focusing on natural hazards-related provisions from the International Building Code (IBC) and International Residential Code (IRC). The document details the provisions, repairs, and improvements required by the IEBC in cases of SSD, covering damage assessment, retrofit criteria, and design considerations based on two types of SSD triggers: lateral system and gravity system. It also explains the building code provisions related to repairing, restoring, and improving structures after sustaining various levels of damage.