Multi-Hazard Mitigation Plan: 17. Shelters

Home

Chapter 17:Shelters chord bearing points. Other retrofits and/or documentation are required to comply with the criteria of a Type A hurricane shelter. • Complete all retrofits listed above required for Type B classification • Provide retrofits so that all openings (doors, windows, and louvers) meet ASTM E 1886 and ASTM E 1996 test standards for 115 mph design wind pressures and missile impact level C protection or better, or provide documentation of any existing openings that may be claimed to meet these performance requirements In addition to retrofits that must be made to Building D, architectural requirements must be considered as well. The Summary of Recommended Criteria and Guidelines for Hurricane Shelter Classifications require that Type EHPA hurricane shelters have a restroom within the shelter area. Although the restrooms are contained within Building D, they are not accessible through interior openings of all other designated shelter areas within the building. • Complete all retrofits listed above required for Type A and Type B classification • Install a deployable protective screen enclosure or similar device around the building to allow a safe access corridor to the restrooms. The screen must be pressure rated for design wind speeds of 140 mph or greater and missile level D impact rated or higher • Since most structural elements begin to approach or exceed their allowable load capacity under partially enclosed conditions at around the minimum acceptable wind speeds for Type EHPA shelters, the wind loads can be reduced by creating enclosed conditions. To accomplish this all fixed louvers must be closed by some method during storm events or operable louvers installed. These and all other openings must be pressure rated for design wind speeds of 140 mph or greater and missile level D impact rated or higher. • Provide retrofits so that all openings (doors, windows, and louvers) meet ASTM E 1886 and ASTM E 1996 test standards for 140 mph design wind pressures and missile impact level D protection or better, or provide documentation of any existing openings that may be claimed to meet these performance requirements 17.1.1.3 Waikoloa Elementary School- Classroom Building E 17-11 Hawaii County Multi-Hazard Mitigation Plan