Improved seismic design and seismic retrofitting of vulnerable configurations will increase the probability that homes are available to provide shelter immediately following moderate to large seismic events. The purpose of this prestandard is provide a methodology to identify and retrofit specific known vulnerabilities in wood light-frame dwellings. Development of the assessment and retrofit provisions has included use of the best available seismic numerical modeling tools and engineering practices to assist in development of assessment methods and to identify retrofit criteria to best achieve targeted performance objectives. Use of the provisions is anticipated to improve earthquake performance but is not intended to prevent earthquake damage.
This prestandard provides a stand-alone resource for assessment and retrofit, incorporating all provisions required for implementation, and includes figures containing prescriptive, pre-engineered structural drawings and commentary, as well as appendices that are expected to remain non-mandatory.
Note: FEMA documents are available online free of charge, and in hard copy by contacting FEMA (phone: 1-800-480-2520). The above cost is the cost of handling.