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NIST Technical Note 1664: Occupant Behavior in a High-rise Office Building Fire - Picture 1 of 1

NIST Technical Note 1664: Occupant Behavior in a High-Rise Office Building Fire by U. S. Department U.S. Department of Commerce (2014, Trade Paperback)

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The level of safety that a building affords occupants during a fire is determined in one of two ways: 1) the use of prescriptive codes and 2) the use of performance-based codes or design. In the first case, an engineer consults a set of building and/or fire codes to ensure that the building has the required number and width of exits, appropriate number and spacing of suppression and detection systems, etc. However, very few of these regulations are based on a scientific understanding of how occupants will use the building and take action during an emergency (i.e., occupant behavior). In the second case, an engineer determines whether the time when untenable conditions develop in the building (ASET or available safe egress time) exceeds the time needed for occupants to evacuate the building or a portion of the building (RSET or required safe egress time). Engineers use tools ranging in sophistication from back-of-the-envelope evacuation calculations to computer-based evacuation simulation models. However, due to a lack of data on occupant behavior during fire emergencies, these tools often simplify each evacuation scenario such that occupant behavior is mostly ignored and only the time required for occupant movement is accounted for.