States that can survive on their own1/11/2024 Other jurisdictions have been slow to adopt the latest code editions. Some states and local jurisdictions have adopted the codes but have made amendments or exclusions relating to the seismic provisions. FEMA’s companion document Earthquake Resistant Design Concepts (FEMA P-749) provides a nontechnical background explanation.Īdoption of the model codes is uneven across and within states, even in areas with high levels of seismic hazard. A primary resource is the 2020 NEHRP Provisions Edition Volume I and Volume II. These seismic provisions represent the best available guidance on how structures should be designed and constructed to limit seismic risk.Ĭhanges or additions to the seismic provisions come from many different sources, including new research results and documentation of performance in past earthquakes. Some provisions within the IBC, IRC and IEBC are intended to ensure that structures can adequately resist seismic forces during earthquakes. In 2000, the three regionally-based model code organizations (BOCA National Code, SBCCI Standard Code and ICBO Uniform Code) combined together to form the ICC. The ICC publishes new editions of the International Codes every three years and many states and localities have adopted them since the first editions were issued in 2000. International Existing Building Code (IEBC): Applies to the alteration, repair, addition or change in occupancy of existing structures.
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