Abstract
This study analyzed the RSETs for 11-story or less apartments where the building-related laws were not retroactively applied, with consideration of the decrease of direct stairs width due to obstacles piled up on the direct stairs. The RSET was shown to be 631.8 seconds when the width of the direct stairs was 1,260mm. The evacuation time exceeded 5 minutes even when there were no obstacles due to the delayed evacuation start time. The risk increased when the width of the direct stairs was decreased to 960mm, 760mm, and 560mm because of obstacles, and the RSETs were 768.8 seconds, 803.3 seconds, and 834.4 seconds respectively. There are various ways to eliminate the occurrence of obstacles on direct stairs which increase RSET : First, it is necessary to remove the exception that permits the placement of obstacles on the stairs. Second, penalties for the placement of obstacles on the direct stairs should be enforced as written. Third, the fire safety managers need the authority to act on behalf of the fire officials. Lastly, it is necessary to encourage residents to report instances of obstacle accumulation. Henceforth, more research is needed on the spread speed of smoke and toxic gases depending on whether fire doors are installed through fire simulation.
Highlights
Research ArticleArticle History: Received: 11 January 2021; Accepted: 27 February 2021; Published online: 5 April 2021
Apartments with eleven stories or less that were approved for business before December 30, 2003 do not have fire doors installed on all floors
In a 11-story or less apartment complex, residents are familiar with the building's interior, alarm and evacuation routes, but the evacuation time was set at less than five minutes, assuming that they were likely to be asleep in the event of a fire at night, and that they were notified of the fire through non-training staff who were night guards.[14]
Summary
Article History: Received: 11 January 2021; Accepted: 27 February 2021; Published online: 5 April 2021. Abstract:This study analyzed the RSETs for 11-story or less apartments where the building-related laws were not retroactively applied, with consideration of the decrease of direct stairs width due to obstacles piled up on the direct stairs. The RSET was shown to be 631.8 seconds when the width of the direct stairs was 1,260mm. The risk increased when the width of the direct stairs was decreased to 960mm, 760mm, and 560mm because of obstacles, and the RSETs were 768.8 seconds, 803.3 seconds, and 834.4 seconds respectively. There are various ways to eliminate the occurrence of obstacles on direct stairs which increase RSET : First, it is necessary to remove the exception that permits the placement of obstacles on the stairs. Penalties for the placement of obstacles on the direct stairs should be enforced as written. Keywords : Pathfinder, Apartment, Direct Stairs Width, Required Safe Egress Time, Obstacles
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