Now Available! FEMA P-2090/ NIST SP-1254 Special Report

The joint FEMA P-2090/ NIST SP-1254 Special Report, Recommended Options for Improving the Built Environment for Post-Earthquake Reoccupancy and Functional Recovery Time, is available for immediate download.  This report was requested by Congress as part of the most recent National Earthquake Hazards Reduction Program (NEHRP) reauthorization, and is the work of a Committee of Experts including more than 30 individuals from federal agencies, nongovernmental organizations, private sector entities, disaster management professional associations, engineering professional associations, and professional construction and homebuilding industry associations.

The report provides options in the form of recommendations, tasks, and alternatives for improving the built environment to increase resilience and reduce the impacts of future natural hazard events.  It includes one overarching recommendation and six additional supporting recommendations. Across all recommendations, there are 17 tasks identifying necessary actions and nine possible alternative actions needed for implementation.  Finally, the report includes an assessment of the recommendations and describes a path forward for implementation.  

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November 5, 2001

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The Applied Technology Council (ATC) and the City of Los Angeles Department of Building & Safety (LADBS) are pleased to announce the ATC-50 Seminar on Seismic Evaluation, Grading, and Rehabilitation of Single-Family Wood-Frame Dwellings, to be held January 17, 2002 in the City of Commerce at the Wyndham Hotel. The seminar is the capstone activity in the ATC-50 project, which was initiated by the City of Los Angeles Mayor's Blue Ribbon Panel because of the high financial losses resulting from damage to single-family wood-frame dwellings as a result of the 1994 Northridge earthquake. The purpose of the 1-day seminar is to provide participants with detailed information about the ATC-50 seismic evaluation, grading and rehabilitation procedures, including an overview of the pilot testing phase of the project in which 500 buildings were evaluated and graded using preliminary versions of the procedures, and 50 homes are being retrofitted.

The seminar program has been developed for building inspectors, contractors, structural design professionals, building officials, and representatives of insurance companies and financial institutions. Topics to be addressed include:

  • the ATC-50 Seismic Evaluation and Grading Procedures, which enable a certified inspector to evaluate a detached single-family wood-frame dwelling and assign a seismic grade, ranging from A through D. (Each grade represents an expected range of damage, expressed as a percentage of replacement cost, should the dwelling be subjected to severe earthquake ground shaking),
  • the ATC-50-1 Seismic Rehabilitation Guidelines, which provide prescriptive methods, simplified engineering methods, and fully engineered methods that, if implemented, allow the homeowner to improve the seismic grade, and
  • incentives for homeowners to participate voluntarily in the program (ATC-50-2 report, Safe at Home in Earthquakes: A New Earthquake Safety Program).

The seminar program will include plenary sessions and break-out sessions to provide a more conducive environment for questions and discussions about the new ATC-50 procedures. The seminar speakers, including local practicing structural engineers and building regulatory officials involved in ATC-50 developmental work, were selected by ATC for their technical expertise and their ability to convey technical information effectively to large audiences.

The seminar registration fee is $150 ($120 for ATC Subscribers) and covers copies of the ATC-50, ATC-50-1, and ATC-50-2 reports, luncheon, and coffee breaks. A late fee of $25 will be imposed on registrations postmarked or faxed after January 7, 2002. For further information, contact: ATC-50 Project, Applied Technology Council, 555 Twin Dolphin Drive, Suite 550, Redwood City, CA 94065; Fax: 650/593-2320; E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. A PDF version of the registration form can be downloaded here.


A Commitment to Ethics, Equity, Diversity, and Inclusion

As structural engineers, we frame our contributions to society through our professionalism and ethics in the duties we perform. In our practice, we serve society and are active participants in the fabric of the communities in which we live. As structural engineers, we cannot limit ourselves to solving only problems of science and engineering. Ignoring the social, economic, and political contexts surrounding our engineering work is a path to irrelevancy. Our active participation includes a moral obligation to right the social and ethical wrongs we observe.

Therefore, as part of our active strategic planning process, we will critically examine the ethical values, equity, and diversity present in our internal processes and practices related to our staff, clients, and consultants.  Please read our full statement here.

Recently Released Reports

September 19, 2017 Puebla-Morelos, Mexico Earthquake: Seismological and Structural Observations by the ATC Reconnaissance Team

The ATC-141 report documents the findings of the field team, including observation of earthquake effects for 70 buildings, microtremors recorded using monitoring instruments at 7 buildings, and a compilation of processed ground motion recordings from UNAM (National Autonomous University of Mexico) and CIRES (Center of Instrumentation and Seismic Records). This report also serves as a reference to two papers approved for publication in Earthquake Engineering Research Institute (EERI) Spectra Journal.

CEA-EDA-01,  Earthquake Damage Assessment and Repair Guidelines for Residential Wood-Frame Buildings, Volume 1 – General Guidelines

This two-volume series describes the process of identifying, evaluating, and repairing common earthquake damage in typical residential wood-frame houses and is intended to increase the efficiency, consistency, and reliability of the earthquake damage assessment and repair process. Volume 1 (CEA-EDA-01) is intended to be used by insurance claim representatives, building contractors, homeowners, and others familiar with construction and repair. 

CEA-EDA-02, Earthquake Damage Assessment and Repair Guidelines for Residential Wood-Frame Buildings, Volume 2 – Engineering Guidelines

Volume 2 (CEA-EDA-02) is intended to be used by structural and geotechnical engineers, and others with relevant technical experience. The Guidelines help users create a conceptual scope of repair for a wood-frame house damaged by an earthquake.

Proceedings: FEMA-Sponsored Summit on Unreinforced Masonry Buildings in Utah

The Applied Technology Council is pleased to announce the availability for free of ATC-137-2, Proceedings: FEMA-Sponsored Summit on Unreinforced Masonry Buildings in Utah presents the summit agenda, include slides from the plenary presentations, and summarize the themes expressed during the breakout discussions. 

FEMA P-530, Earthquake Safety at Home

Half of all Americans live in areas subject to earthquake risk, and most Americans will travel to seismically active regions in their lifetime. FEMA P-530, Earthquake Safety at Home, shows readers why earthquakes matter where they live, and how they can Prepare, Protect, Survive, Respond, Recover, and Repair in response to an earthquake.