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How to Use This Guide
This new version of FEMA 74, FEMA E-74 Reducing the Risks of Nonstructural Earthquake Damage—A Practical Guide, Fourth Edition, is designed to be used primarily online. The purpose of the document is the same as for the original: to explain the sources of nonstructural earthquake damage in simple terms and to provide methods for reducing potential risks. Since nonstructural failures have accounted for the majority of earthquake damage in several recent U.S. earthquakes, it is critical to raise awareness of potential nonstructural risks, the costly consequences of nonstructural failures and the opportunities that exist to limit future losses.
This guide is organized as follows:
Chapter 1. Introduction
Defines the scope and limitations of the guidance provided in this e-document.
Chapter 2. Behavior of Nonstructural Components
Provides background information on nonstructural components in buildings, their behavior in earthquakes and the consequences of damage.
Chapter 3. Survey and Assessment Procedures for Existing Buildings
Defines survey and assessment procedures for nonstructural components in existing buildings. The forms, checklists and risk ratings used in the procedures are included in Appendix C, Appendix D, and Appendix E.
Chapter 4. Nonstructural Risk Reduction for Existing Buildings
Provides background information on nonstructural hazard reduction programs for existing buildings.
Chapter 5. Nonstructural Risk Reduction for New Buildings
Provides background information on nonstructural hazard reduction programs for new construction.
Chapter 6. Seismic Protection of Nonstructural Components
Provides both a general overview and detailed illustrations of protection measures against nonstructural damage. Currently, sections 6.3 through 6.5 contain seventy-two examples, complete with photos of actual damage and details illustrating correct mitigation measures.
Chapter 7. Post-Earthquake Data Collection
Provides motivation for collection of post-earthquake nonstructural component data and resources for conducting systematic collection of data for two selected nonstructural components.