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2009 Annual Conference September 22, 2009
Tom Skebey, CFM
Wet Floodproofing
Wet Floodproofing Techniques
• Openings• Flood resistant materials• Protect equipment
Elevate Protect in place
• Modify surfaces for easy cleanup
• Emergency preparedness planning
• O&M plan adjustments
Determine the FPL
Establish systemcomponent vulnerability
Develop alternatives(elevate or protect in place)
Verify with homeownerand code officials
Construct/implement
Wet Floodproofing Design Process
Typical Opening for Solid Foundation Wall
FLOORING MATERIALS CLASSIFICATIONS FORFLOOD RESISTANCE
Classes of FlooringAcceptable Unacceptable
5 4 3 2 1
Asphalt tile Carpeting (glued down type) Concrete, precast or in-situ Terrazzo tile Vinyl tile or sheets (coatedon cork or wood productbackings)
Wood flooring orunderlayments
Pressure-treated lumber, .40CCA4
Flooring Materials
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Modify Surfaces
• Contamination issues
• Ease of cleanup
• Paint
• Cladding
• Resurface
Utility Systems
• Electrical systems
• Heating, ventilation and air conditioning (HVAC) systems
• Fuel supply/storage systems
• Water systems
• Sewer systems
Electrical Systems
Protective measures:• Raise or relocate equipment
and devices above the FPL• Seal outside wall penetrations,
mechanically protect wiring system in flood-prone locations
• Seal out moisture• Add Ground Fault Interrupting
Circuit (GFIC) breakers
Heating, Ventilating, and Air Conditioning (HVAC) Systems
• Maintenance of required equipment clearances and access dictated by code and/or manufacturer
• Provision of adequate combustion air for fuel-burning equipment
• Modification and/or maintenance of proper venting of fuel-burning equipment
• Eliminating ductwork below the DFE
Fuel Supply/Storage Systems
• Use of flexible connections
• Adequate support and anchorage to resist hydrostatic and hydrodynamic forces that act on tank
• Relocation of fuel tank because of equipment relocation
• Use of automatic cut-off valves
Water Systems
• Minimizing plumbing fixtures below the FPL
• Modification of fixtures to prevent backflow
• Protection of system components from high velocity flow
• Modification of the well top using watertight casing
• Installation and/or maintenance of a check or sewer backflow prevention valve
• Installation of an effluent ejector pump
• Provision of a backup electrical source
• Sealing of septic tank to prevent contamination
• Adequate anchorage of septic tank to withstand buoyancy forces
Sewer Systems
1. RETURN AND SUPPLY AIR2. HORIZONTAL AIR FURNACE WITH
ADD-ON COOLING, 2 to 5 TON CAPACITY
3. EXTERNAL DUCT AND EQUIPMENT INSTALLATION
4. EARTHQUAKE STRAPPING
FLOORS NOT SHOWN FOR CLARITY
Elevation of HVAC Components Below a Floor, Above DFE
Enclosure to Protect From Shallow Flooding
Elevated Water Heater
Protection of Service Equipment
Emergency Preparedness Planning
• Flood warning system
• Warning time
• Implementation time
• Examples
Operation and Maintenance Plans
• Flood warning system
• Warning time
• Active involvement
• Who does what?
• Drills
• Examples
References
Wet Floodproofing
Questions?