Building Performance: Hurricane Iniki in Hawaii - Observations, Recommendations, and Technical Guidance

On September 22, 1992, at the request of the Mayor of Kauai County, the Federal Coordinating Officer for the Iniki disaster tasked the Federal Emergency Management Agency?s (FEMA?s) Federal Insurance Administration (FIA) to assemble a team of experts to assess the performance of buildings. The team was tasked with surveying the performance of primarily residential structures under wind and water forces generated during Hurricane Iniki. The goal of this effort is to provide guidance and offer recommendations for reducing damage from future hurricanes. This goal is best met through learning from both failures and successes of building performance. During the field assessment, the team investigated primarily structural systems (i.e., systems in a building that resist lateral and vertical forces. For all buildings, the performance of exterior architectural systems, such as roofing, windows, and doors was analyzed. The analysis also included the effects of windborne and waterborne debris and the quality of construction and materials. The majority of building types observed were one- and two-story, wood-frame, single-family and multi-family residential structures. However, pre-engineered steel commercial and industrial buildings, as well as resort hotels and condominiums constructed of reinforced concrete and masonry, were also examined. This report includes detailed engineering discussions of building failure modes and successful building performance. It also provides detailed recommendations for enhancing building performance under hurricane and flood conditions.