FEMA 453 Design Guidance for Shelters and Safe Rooms

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CBR ThReaT pRoTeCTion Figure 3- Task 3. Determine the Level of Safe Room Positive Pressure Required For a safe room of this height, buoyancy pressure is significant, and both wind pressure and buoyancy pressure must be considered in determining the safe room operating pressure. As a corner stairwell, it has two exterior walls. The pressure requirement is defined as the velocity pressure of a 20-mph wind plus the buoyancy pressure that occurs against ground-level doors and other points of leakage at winter design conditions. With a height of 140 feet, the maximum buoyancy pressure at the lowest level of the stairwell is calculated at 0.11 iwg for a 60-degree Fahrenheit indooroutdoor temperature differential. Adding the maximum wind pressure of 0.2 iwg for a 20-mph wind yields a design pressure of 0.3 iwg. At an internal pressure of 0.3 iwg, the force required to a blower door test on the selected safe room aids in estimating the size of air-filtration unit required and in identifying air leakage paths. SoURCe: BaTTelle 3-3
Figure 3- open the doors into the stairwell is slightly less than 30 pounds at the door handle for the (inward opening) doors, the maximum door opening force allowed by fire code. Ideally, a blower door-test is performed after the permanent sealing measures, including door seals, have been added. In performing the blower door test before these permanent sealing measures are applied, the doors are taped temporarily at the periphery to simulate their being permanently sealed. Results of the blower door test, graphed in Figure 3-6, show that, with doors sealed with tape, the stairwell could be pressurized to 0.3 iwg with about 3,000 cubic feet per minute (cfm). Blower-door test results on the stairwell selected for a safe room SoURCe: BaTTelle 3-3 CBR ThReaT pRoTeCTion
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Risk Management Series Design Guida
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Any opinions, findings, conclusions
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This guidance focuses on safe rooms
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protect occupants until law enforce
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of best practices (based on current
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Project Advisory Panel: Ronald Bark
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1.7.1.1. Tornado.or.Short-term.Shel
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2.6.6. RM1.and.RM2.Reinforced.Mason
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4.5. Community.Shelter.Operations.P
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FIgUREs chapter 1 Figure.1-1.. Terr
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Figure.2-16.. Spray-on.elastomer.co
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chapter 4 Figure.4-1.. Preparedness
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in response to the manmade CBRE thr
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decides not to chance fate and cons
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Although operational security measu
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Table 1-2: Safe Evacuation Distance
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Figure 1-1 terrorism by event 1980
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odorless. Their effects occur mainl
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Figure 1-3 radioactive materials sm
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Table 1-3: Correlation of ISC Level
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Table 1-4: ISC CBR Levels of Protec
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m It is partially shielded by the s
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m Single-use shelters. Single-use s
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structure or a new structure to be
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m Territoriality (promotes a sense
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Figure 1- examples of internal shel
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Figure 1-9 examples of internal she
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loading depending upon the building
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model building codes all have provi
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Figure 1-10 national Weather servic
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operations and maintenance plan. De
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For tornado shelters, the most crit
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Reference Standard 6-1 Photolumines
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every building should have an emerg
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Three methods are followed for the
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partitions for areas of about 12,00
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the 2006 editions of nFPa 101, Life
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Figure 1-13 operations Zones, casua
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Figure 1-1 nrP-cis emergency decont
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Figure 1-1 example of Pentagon stag
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Figure 1-19 site and evidence colle
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2.1 OVerVieW Structural deSign crit
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affect the hazard potential of the
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2.2.1 Blast effects in low-rise Bui
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As an example, panelized constructi
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2.3 hardened cOnStructiOn 2.3.1 Str
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Protective design further requires
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deformed, and transfer them to the
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pressures, such that they overcome
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façade materials intact and attach
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2.4 neW cOnStructiOn The design of
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Blast-resistant detailing requires
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the slab, the slab reinforcement mu
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spacing of 16 inches that extends i
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In order for the glazing to realize
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precast panels, the spacing of the
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to a column or a vehicle-borne expl
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without any means of attachment or
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polycarbonate glazing can be mixed
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Rigid catch bar systems were design
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stainless steel cables connected wi
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Alternatively, an unreinforced maso
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Figure 2- 9 Metal stud blast wall I
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2.5.3 checklist for retrofitting is
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Shearwalls consist of straight or d
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Light wood frame structures do not
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eam column joints, all member stres
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Steel moment frame structures provi
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Steel frames with infill masonry wa
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esponse to 500 pounds of TNT at a s
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Page 156 and 157: 3.1 oVeRVieW This chapter describes
Page 158 and 159: m Class 2. This class also includes
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Page 162 and 163: 3.3 SaFe RooM CRiTeRia This section
Page 164 and 165: interior room is preferable to a ro
Page 166 and 167: m Penetrations. Measures for reduci
Page 168 and 169: Figure 3- hinged covers facilitate
Page 170 and 171: enclosure subjected to wind and buo
Page 172 and 173: Many models of these indoor air pur
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Page 176 and 177: Table 3-2: Leakage per Square Foot
Page 178 and 179: 3.5 opeRaTionS anD MainTenanCe For
Page 180 and 181: m Turn on a radio or TV in the safe
Page 182 and 183: Tape, plastic, and carbon dioxide d
Page 184 and 185: m Isolation dampers. Correct damper
Page 186 and 187: 3.7 CoMMiSSioninG a CLaSS 1 CBR SaF
Page 188 and 189: have been appropriately placed to p
Page 190 and 191: m To develop an understanding of th
Page 194 and 195: Task 4. Determine How Much Filtered
Page 196 and 197: Pre-heat Coil Module. This module c
Page 198: address system or the single-switch
Page 201 and 202: the Homeland security digital Libra
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Page 209 and 210: m Weapons of Mass Destruction-Civil
Page 211 and 212: dHs/FEma and the office for domesti
Page 213 and 214: The 48 seconds do not include the t
Page 215 and 216: Figure 4-5 High-rise buildings and
Page 217 and 218: m In the initial phase (hours and d
Page 219 and 220: designated. The following is a list
Page 221 and 222: m Coordinating shelter evacuation p
Page 223 and 224: 4.5.5 notification manager The Noti
Page 225 and 226: Table 4-1: Shelter Equipment and Su
Page 227 and 228: Toilets would be needed by the occu
Page 229 and 230: 4.5.8.7 Emergency Equipment Credenz
Page 231 and 232: FEma’s United states Fire adminis
Page 233 and 234: 4.7.3 event safety procedures The f
Page 235 and 236: 4.9 training and inFormation Employ
Page 237 and 238: Bureau of Alcohol, Tobacco, Firearm
Page 239 and 240: Federal Emergency Management Agency
Page 241 and 242: Phan, L.T., and Simiu, E. 1998. The
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Army TM 5-853-4, Security Engineeri
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Corps of Engineers Guide Specificat
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Addresses workplace vulnerability t
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State of Florida Shelter Plan, Flor
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Management (2003) http://floridadis
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UL 586, High-Efficiency, Particulat
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C CA California C&C components and
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F FBI Federal Bureau of Investigati
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J JFO Joint Field Office K kb kilob
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O O.C. on center OG outer garments
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U UBC Building Code UCRL University
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