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?