47.5 MB - The Whole Building Design Guide

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Figure 2-12:Katrina’s storm surge flooding knocked down thisfence adjacent to a fire station (2005).Figure 2-13:Flooding caused the failure of this road bed.Source: U.S. Army Corps of EngineersParking lots and parking garages: Paved parking lots may be damagedby failure of bedding materials and loss of driving surface.Vehicles left in parking lots and parking garages could also bedamaged. Most large parking garages are engineered structuresthat can be designed to allow for the flow of water.Stormwater management facilities and site drainage: Site improvementssuch as swales and stormwater basins may be eroded,filled with sediments, or clogged by debris.2.2.2.2 Structural DamageStructural damage includes all damage to the load-bearing portionsof a building. Structural damage can be caused by eachof the characteristics of flooding described in Section 2.1.1.MAKING CRITICAL FACILITIES SAFE FROM Flooding2-43
Damage to other components of buildings is described below,including saturation of materials (Section 2.2.2.3), utility serviceequipment (Section 2.2.2.4), and contents (Section 2.2.2.5).Depth: <strong>The</strong> hydrostatic load or pressure against a wall or foundationis directly related to the depth of water (refer to Figure2-9). Standard stud and siding, or unreinforced brick veneerwalls, may collapse under hydrostatic loads associated with relativelyshallow water. Reinforced masonry walls perform betterthan unreinforced masonry walls (see Figure 2-14), althoughan engineering analysis is required to determine performance.Walls and floors of below-grade areas (basements) are particularlysusceptible to damage by hydrostatic pressure. When soilsare saturated, pressures against below-grade walls are a functionof the total depth of water, including the depth below-grade andthe weight of the saturated soils.Figure 2-14:Interior unreinforcedmasonry walls of the PortSulphur High School inLouisiana were damagedby hydrostatic loadsassociated with HurricaneKatrina’s storm surge(2005).2-44 MAKING CRITICAL FACILITIES SAFE FROM Flooding
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Risk Management SeriesDesign Guidef
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Any opinions, findings, conclusions
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ational during and after a major di
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TARGET AUDIENCEThis manual describe
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Appendix A contains a list of acron
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Forster, FEMA; David Godschalk, Uni
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Chapter 2- Making Critical faciliti
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2.4.6 Utility Installations .......
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4.4.8 Utility Plumbing Systems.....
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avoid them when feasible. In cases
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It then crossed Florida into the Gu
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Figure 1-2: Mississippi coast SLOSH
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isks for the facility at the propos
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m Appoint a building program manage
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-Figure 1-3: Process flow chart for
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hazards, usually refers to a buildi
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occurrence during a specified time
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Page 44 and 45: 1.4 REFERENCESAmerican Society of C
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Page 48 and 49: m Land subsidence, which increases
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Page 54 and 55: year, a very low probability flood
Page 56 and 57: m FIRMs and Flood Insurance Studies
Page 58 and 59: Figure 2-3: Riverine flood hazard z
Page 60 and 61: have been prepared by the U.S. Army
Page 62 and 63: ABFEs represent the best estimate o
Page 64 and 65: The following characteristics that
Page 66 and 67: Figure 2-7 shows the general relati
Page 68 and 69: 2.1.2.5 Hydrodynamic LoadsWater flo
Page 70 and 71: stillwater depth) and that waves pr
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Page 76 and 77: 2.1.3.2 Summary of the NFIP Minimum
Page 78 and 79: complished through a State permit,
Page 80 and 81: Developed through a consensus proce
Page 82 and 83: 2.2 CRITICAL FACILITIES EXPOSED TOF
Page 84 and 85: listed includes health hazards, los
Page 86 and 87: overview on performance-based desig
Page 90 and 91: Buoyancy and uplift: If below-grade
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Page 94 and 95: Metal components: Metal structural
Page 96 and 97: Emergency power generators: Generat
Page 98 and 99: Office records and police files: Wh
Page 100 and 101: 2.3 REQUIREMENTS AND BESTPRACTICES
Page 102 and 103: terior drainage (on the land side);
Page 104 and 105: Slab-on-grade foundation on structu
Page 106 and 107: and debris and ice impact loads. Fl
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Page 114 and 115: 2.3.2.1 Elevation ConsiderationsThe
Page 116 and 117: Figure 2-30:Flood hazard zones inco
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Page 120 and 121: ular attention to underfloor utilit
Page 122 and 123: 2.3.5.4 Storage Tank InstallationsA
Page 124 and 125: 2.4.2 SITE MODIFICATIONSA plan to m
Page 126 and 127: Mobilized floodwall: This category
Page 128 and 129: methods used to move other types of
Page 130 and 131: Even if a facility is unlikely to s
Page 132 and 133: Wastewater system components become
Page 134 and 135: Emergency barriers are measures of
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Table 2-3: Checklist for Building V
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FEMA, Protecting Building Utilities
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MAKING CRITICAL FACILITIES SAFE FRO
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flow is typically 6,000 to 12,000 f
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Tornado: This is a violently rotati
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Figure 3-3: Design wind speeds for
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Exposure: The characteristics of th
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Internal pressure (building pressur
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Figure 3-7:Schematic of internalpre
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Figure 3-8: Relative roof uplift pr
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larities will normally be based on
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spread in both of those storms. Pri
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and subsequent progressive failure;
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3.2 CRITICAL FACILITIES EXPOSED TOH
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Wall coverings, soffits, and large
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oof panels were applied over metal
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3.2.2 Evaluating Critical Facilitie
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Step 2: Perform a field investigati
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3.3.1.1 SiteWhen selecting land for
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schools are required to be designed
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As part of the detailed design effo
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steel. FEMA Technical Bulletin, Cor
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a window submittal should show that
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and limited uplift resistance of de
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Figure 3-23:View looking down at th
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m For buildings that have mechanica
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sionals should also specify the att
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Figure 3-31:Door sill pan flashing
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Adjustable jamb/head weatherstrippi
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E 2112 provides guidance on the des
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Soffits: Depending on the wind dire
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mph, those used for hurricane shelt
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Figure 3-47:These four ties werenev
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m Install ties as the brick is laid
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At the hospital shown in Figure 3-5
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etween the hospital and the medical
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metal panels were attached with con
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avoid blow-off. Stainless steel or
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If the roof system is fully adhered
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Figure 3-60:View of the underside o
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ities. For FMG-insured facilities,
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Figure 3-65:The original modifiedbi
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Figure 3-66:If mechanically attache
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Loads and Attachment Methods 9Infor
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Fan cowling attachment: Fans are fr
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Condenser attachment: In lieu of pl
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Boiler and exhaust stack attachment
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Figure 3-78:Collapsed hospital ligh
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Figure 3-80:The antenna tower atthi
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Table 3-3: Risk Reduction Design Me
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Table 3-3: Risk Reduction Design Me
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Chapter 4 for information on the pe
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Figure 3-83:Open walkways donot pro
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ASTM E 1996 specifies five missile
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ASCE 7 refers to ASTM E 1996 for mi
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For interior non-load-bearing mason
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m For structural metal roofs, it is
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Mechanically attached and air-press
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Figure 3-92:To avoid walkway padblo
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3.4.4.2 Mechanical PenthousesBy pla
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To enhance the wind performance of
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Mechanically attached single-ply me
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to power generation stations and by
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occupants can have bottled water pr
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Table 3-4: Recommendations for Desi
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Strong and violent tornadoes can ge
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For critical facilities located in
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Retrofitting a shelter space inside
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funds are not available for strengt
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Figure 3-106:The school’s built-u
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3.6.2 Building EnvelopeThe followin
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Shutters are typically a more econo
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semblies with laminated glass assem
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Figure 3-116:The edge nailer on top
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Figure 3-118:The antenna at thishos
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3.7 Checklist for BuildingVulnerabi
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3.8 References and Sources ofAdditi
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American Society for Testing and Ma
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FEMA, Attachment of Brick Veneer in
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accompanied with suggestions on pos
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Hurricane Katrina emphasized the fa
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The water supply was interrupted an
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Hancock Medical Center in Bay St. L
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Figure 4-4:Penthouse at the WestJef
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Figure 4-6:Repair of EIFS wallcover
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The primary cause of window breakag
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West Jefferson Medical Center lost
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4.2.8 Mechanical and ElectricalSyst
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covering the fill cap and all vent
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emergency communications frequently
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mary and West Jefferson Medical Cen
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4.3 EDUCATIONAL FACILITIES4.3.1 Bac
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4.3.2 Effects of FloodingThe most d
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Figure 4-17:Broken windows atD’Ib
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St. Stanislaus High School in Bay S
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4.3.6 Structural SystemsMost of the
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The St. Stanislaus High School camp
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Figure 4-27:Metal roof covering pee
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ment, especially HVAC systems, was
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Figure 4-30:Interior damage at Char
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m Doors should be designed to meet
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different, most of them require and
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4.4.3 Effects of High WindsThe high
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Figure 4-33:Jackson County EOCFigur
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them experienced significant proble
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Figure 4-37:Back Bay Fire Company#3
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Figure 4-39:Gulfport Fire Station #
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Third District Fire Station in New
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Figure 4-44:Roof damage at HancockC
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underground tank for toilets and wa
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Figure 4-47:Generator mounted atgra
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Figure 4-49:Broken communicationsma
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erate without adequate emergency po
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FISFMAFMGFMRHMGPIBCICCICULPSMEPSMOB
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Building, enclosed. A building that
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Floodway. The channel and that port
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OOpenings. Apertures or holes in th
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FEMA Mitigation ProgramscFederal fu
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Table 1: Side-by-Side of FEMA Progr
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todial care facilities (including t
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aged windows with impact-resistant
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tions, and wastewater treatment pla
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