American Society of Civil Engineers (ASCE) 7

American Society of Civil Engineers (ASCE) 7
Name	ASCE 7
Genre	Building code standard
Published	20th century–present
Publisher	American Society of Civil Engineers

American Society of Civil Engineers (ASCE) 7 is a technical standard that prescribes minimum design loads for buildings and other structures, produced by the American Society of Civil Engineers and used widely in the United States and internationally. It informs model building codes and engineering practice by integrating criteria from organizations such as the National Fire Protection Association, the International Code Council, and the Federal Emergency Management Agency while aligning with work by the National Institute of Standards and Technology, the United States Geological Survey, and the American Institute of Architects.

History and Development

The standard emerged from early 20th-century efforts linking engineering societies such as the American Society of Civil Engineers, the American Society of Mechanical Engineers, the Institution of Civil Engineers, and the Royal Institute of British Architects to address failures studied after events like the 1906 San Francisco earthquake and the 1933 Long Beach earthquake, drawing on investigations by the National Academy of Sciences and the Seismological Society of America. Later developments incorporated research from organizations including the United States Geological Survey, the National Bureau of Standards, the Federal Emergency Management Agency, and the Pacific Earthquake Engineering Research Center after disasters such as the 1964 Alaska earthquake, the 1989 Loma Prieta earthquake, and the 2011 Tōhoku earthquake and tsunami. Committees and task forces composed of members from entities like the American Concrete Institute, the American Institute of Steel Construction, the Structural Engineering Institute, the National Institute of Standards and Technology, and university programs at Massachusetts Institute of Technology, University of California, Berkeley, and Stanford University shaped the evolution of the standard.

Scope and Purpose

The standard defines minimum loads for structural design to address hazards recognized by organizations such as the International Code Council, the National Fire Protection Association, the Occupational Safety and Health Administration, the Environmental Protection Agency, and the Department of Housing and Urban Development. It covers provisions influenced by studies from the National Research Council, the National Earthquake Hazards Reduction Program, the Federal Highway Administration, and the American Society for Testing and Materials, integrating criteria relevant to wind analyzed by the American Meteorological Society, snow assessed by the National Oceanic and Atmospheric Administration, and seismic parameters provided by the United States Geological Survey. Intended users include licensed professionals affiliated with state licensing boards, municipal building departments, consulting firms, and academic researchers at institutions such as Columbia University, Princeton University, and University of Illinois Urbana-Champaign.

Editions and Revisions

Editions have been released periodically with input from committees and standards organizations including the International Code Council, the American Institute of Architects, the National Fire Protection Association, and the National Society of Professional Engineers. Revisions responded to lessons from events such as the 1995 Kobe earthquake, the 2005 Hurricane Katrina, the 2010 Haiti earthquake, and post-event analyses by the National Institute of Standards and Technology and the Pacific Earthquake Engineering Research Center. Working groups featured participants from the American Concrete Institute, the American Institute of Steel Construction, the Structural Engineering Institute, university researchers at California Institute of Technology and University of California, Los Angeles, and government labs such as Sandia National Laboratories.

Key Provisions and Load Criteria

The standard details load combinations, dead and live loads, wind loads, seismic forces, snow loads, rain and flood considerations, and special load cases guided by research from the United States Geological Survey, the Federal Emergency Management Agency, the National Oceanic and Atmospheric Administration, and the American Meteorological Society. Seismic design metrics reference ground motions and spectra developed through collaborations among the Pacific Earthquake Engineering Research Center, the National Earthquake Hazards Reduction Program, the United States Geological Survey, and university programs at University of Washington and University of California, Santa Barbara. Wind provisions incorporate data and methodologies from the National Weather Service, the American Society of Civil Engineers, the International Code Council, and the American Society of Mechanical Engineers, while snow criteria align with studies by the National Oceanic and Atmospheric Administration and the American Society of Agricultural and Biological Engineers.

Adoption and Legal Status

Jurisdictions adopt the standard through incorporation by reference into model codes and state statutes via bodies such as the International Code Council, state legislatures, municipal councils, and regulatory agencies including state departments of buildings and licensing boards. Adoption processes involved stakeholders like the American Institute of Architects, chambers of commerce, insurance regulators, and emergency management agencies such as the Federal Emergency Management Agency and state emergency offices. Legal challenges and code amendments have involved courts, administrative tribunals, and commissions influenced by professional societies including the National Society of Professional Engineers and the American Bar Association in matters concerning liability, enforcement, and code compliance.

Impact on Engineering Practice and Design Standards

The standard shapes practice across structural engineering firms, consulting practices, municipal permitting offices, and academic curricula at institutions such as Georgia Institute of Technology, Purdue University, and University of Texas at Austin. It informs material specifications used by the American Concrete Institute and the American Institute of Steel Construction, influences insurance underwriting by insurers and rating agencies, and guides disaster mitigation programs run by the Federal Emergency Management Agency and the National Institute of Standards and Technology. The standard also underpins international collaborations and technical exchanges involving organizations such as the International Code Council, the World Bank, the Asian Development Bank, and the United Nations Office for Disaster Risk Reduction.

Category:Engineering standards