Updated Home Builder's Guide to Coastal Construction ...

Updated Home Builder's Guide to CoastalConstruction – Technical Fact Sheets

2011 National Hurricane Conference 1

2011 National Hurricane Conference

Updated Home Builder's Guide toCoastal Construction – Technical

Fact Sheets

Updated Home Builder's Guide toCoastal Construction – Technical

Fact Sheets

Manuel Perotin, PE, CFM



AgendaAgenda

Background & General Information

New Fact Sheets

Updated Fact Sheets & Guidance

Resources

FEMA Guidance/Publications




Background & General InformationBackground & General Information

Original FEMA 499 Publication

August 2005

31 Fact Sheets

Updated FEMA P-499

December 2010

37 Fact Sheets



Updated FEMA P-499

Developed in association with the NationalAssociation of Home Builders ResearchCenter

Review/Input

Brick Industry Association

Insulating Concrete Form Association

International Window Film Association

Structural Insulated Panel Association

Several Other





Updated FEMA P-499

New Standards and Guidance

ASCE 7-10 Wind Speeds for somesheets

2009 International Residential Code

Lessons learned since previous version(Hurricane Katrina, Hurricane Ike, etc.)

Ongoing FEMA 55 – CoastalConstruction Manual Update

Latest NFIP Regulatory Requirements



Updated FEMA P-499

Organized into 10 Categories

General Openings

Planning Roofing

Foundations Attachments

Load Paths Repairs

Wall Systems Guide




New Fact SheetsNew Fact Sheets

Designing for Flood Levels Above the BFE(1.6)

Outlines design and construction practicesthat reduce the likelihood of flood damage inthe event that flood levels exceed the BFE

FIRM and Flood Risk

Consequences of Flood Levels Exceedingthe BFE

Recommendations

Potential impacts on Flood InsurancePremium



Designing for Flood Levels Above the BFE(1.6)

Adding freeboard to the BFE

ASCE 24-05 requires 0 to 2’ of freeboarddepending on the building importance

2009 IRC requires 1’ of freeboard in VZones and Coastal A Zones

General Recommendation

Older FIRM - ASCE 24-05, plus 3 feet

New DFIRMs - freeboard elevationspecified by ASCE 24-05





Non-Traditional Building Materials &Systems(1.8)

Guidance on non-traditional buildingmaterials and techniques and theirappropriate application in coastalenvironments



Non-Traditional Building Materials &Systems(1.8)

Engineered Wood Products

Structural Insulated Panels (SIPs)

Insulating Concrete Forms (ICFs)

Prefabricated Shear Walls and MomentFrames

Sprayed Closed-Cell Foam Insulation

Advanced Wall Framing

Modular Houses





Attachment of Brick Veneer in High-WindRegions (5.4)

Guidance on practices for installing brickveneer that will enhance wind resistance

ACI 530/ASCE 5/TMS 402: Building CodeRequirements for Masonry Structures

Brick Industry Association Technical Notes

Construction Guidance

Tie Installation



Minimizing Water Intrusion through Roof Ventsin High-Wind Regions (7.5)

Guidance for minimizing water intrusionthrough roof vent systems that can lead tointerior damage and mold growth in high-wind regions





Minimizing Water Intrusion through Roof Ventsin High-Wind Regions (7.5)

Soffit Vents

Ridge Vents

Gable End Vents

Off-Ridge Vents

Gable Rake Vents

Turbines



Metal Roof Systems in High-Wind Regions (7.6)

Guidance for designing and installing metalroof systems that will enhance windresistance

Metal Roofing Options

Standing-Seam Hydrostatic (i.e., water-barrier) Systems

Hydrokinetic(i.e., water-shedding)panels

Metal Shingles

Construction Guidance




Updated Fact SheetsUpdated Fact Sheets

Summary of Coastal ConstructionRequirements and Recommendations forFlood Effects (1.2)

Recommendations for exceeding NFIPregulatory requirements concerning coastalconstruction

Guidance updated based on

Latest NFIP requirements

2009 I-Codes

Best practices



Using a Digital Flood Insurance Rate Map(DFIRM)(1.3)

Explains the purpose of FIRMs, DFIRMs,highlight features that are important tocoastal builders, and explain how to obtainFIRMs, DFIRMs, and FISs

Update includes

Area of Moderate Wave Action (MOWA)

Sample DFIRM





Lowest Floor Elevation (1.4)

Outline the benefits of exceeding the NFIPminimum elevation requirements; identifycommon NFIP violations; and discuss theNFIP Elevation Certificate

Update includes

Enhanced best practices (specificallyCoastal A Zones)

Guidance on latest FEMAElevationCertificates



V Zone Design and ConstructionCertification(1.5)

Outline the V Zone requirements of theNFIP to verify that the design of thefoundation, lowest floor elevation, andfoundation anchorage requirements

Update includes

Revised Example V Zone Certificate

Updated to the 2009 IRC requirements

Refers to ASCE 7-05 and 24-05





Coastal Building Materials (1.7)

Guidance and best practices on selectingbuilding materials to use for coastalconstruction

Update includes

Enhanced best practices from lessonslearned and recommendationsspecifically related to August 2008update of FEMA Technical Bulletin 2 –Flood Damage Resistant MaterialsRequirements



Foundations in Coastal Areas(3.1)

Guidance on foundation types suitable forcoastal environments

Update includes

Integrates ASCE 24-05 guidance

Coastal A Zone

Lessons learned/recommendations fromHurricane Katrina and Ike MAT Reports





Pile Design and Installation (3.2)

Guidance on pile design and installation

Update includes

Guidance on erosion and scour

Integrates FEMA 550 guidance

Lessons learned/recommendations fromHurricane Katrina and Ike MAT Reports



Wood Pile-to-Beam Connections (3.3)

Guidance related to typical wood pile-to-beam connections

Update includes

Built-up beams

Connectors must meet IRC corrosionprotection requirements and becompatible with the wood varietyselected for construction





Reinforced Masonry Pier Construction (3.4)

Guidance related to masonry pierconstruction where they are an acceptablealternative

Update includes

Proper connection to the floor beam

Corrosion protection of reinforcement

Pros and Cons of Grade Beams



Siding Installation in High-Wind Regions (5.3)

Guidance related to design and installationtips for various types of siding that willenhance wind resistance

Update includes

Guidance from ASTM E2266, StandardGuide for Design and Construction ofLow-Rise Frame Building Wall Systemsto Resist Water Intrusion

Detailed methods for wind resistance

Sustainable design





Protection of Openings-Shutters & Glazing(6.2)

Provide general information about theselection and installation of openingprotection in windborne debris regions

Update includes

Revised guidance based on latestopening requirements in codes (IRC),standards (ASCE 7), and APA guidance



Enclosures and Breakaway Walls (8.1)

Guidance related to enclosures andbreakaway walls below BFE

Update includes

Obstruction Considerations and the NFIPFlood Insurance Manual

Lattice versus solid breakaway walls

Lessons learned/observations fromHurricane Ike





Repairs, Remodeling, Additions andRetrofitting – Flood (9.1) & Wind (9.2)

Guidance related to best practicerecommendations for repairs, remodeling,and additions, and propose opportunities forretrofitting

Update includes

Split fact sheet into ‘Flood’ and ‘Wind’

Latest Code and SI/SD requirements

Detailed wind retrofits (i.e., gable end)



References and Resources (G.2)

Lists references and resources relevant totopics covered in FEMA P-499

Update includes material from: American Wood Council Brick Industry Association Metal Construction Association National Roofing Contractors Association Masonry Society Timber Pile Council Vinyl Siding Institute




ResourcesResources


ResourcesResources

1. Openings in Foundation Walls andWalls of Enclosures (2008)

2. Flood Damage-Resistant MaterialsRequirements (2008)

3. Non-Residential Floodproofing (1993)

4. Elevator Installation (1993)

5. Free-of-Obstruction Requirements(2008)

6. Below-Grade Parking Requirements(1993)

7. Wet Floodproofing Requirements(1993)

8. Corrosion Protection for MetalConnectors in Coastal Areas (1996)

9. Design and Construction Guidancefor Breakaway Walls (2008)

10. Ensuring that Structures Built on FillIn or Near Special Flood HazardAreas are Reasonably Safe from

Flooding (2001)

11. Crawlspace Construction forBuildings Located in Special FloodHazard Areas are Reasonably Safe

from Flooding (2001)




References (In progress)References (In progress)

Coastal Construction Manual Update

Flood Code Master

ASCE 24 Update


QuestionsQuestions

Flood/Wind Building Science Helpline

[email protected]

(866) 927-2104

http://www.FEMA.gov/Rebuild/BuildingScience

FEMA Publication Warehouse

(800) 480-2520





GENERAL- Coastal Building Success and Failures (1.1 1)- Summary of Coastal Construction Requirements and Recommendations for FloodEffects (1.2 2) Updated- Using a Digital Flood Insurance Rate Map (DFIRM) (1.3 3) Updated- Lowest Floor Elevation (1.4 4) Updated- V Zone Design Certification (1.5 5) Updated- Designing for Flood Levels Above the BFE (1.6 New)- Coastal Building Materials (1.7 8) Updated- Non-Traditional Building Materials and Systems (1.8 New)- Moisture Barrier Systems (1.9 9)

PLANNING- How Do Siting and Design Decisions Affect the Owner’s Costs? (2.1 6)- Selecting a Lot and Siting the Building (2.2 7)

FOUNDATIONS- Foundations in Coastal Areas (3.1 11) Updated- Pile Design and Installation (3.2 12) Updated- Wood Pile-to-Beam Connections (3.3 13) Updated- Reinforced Masonry Pier Construction (3.4 14) Updated- Foundation Walls (3.5 15)




LOAD PATHS- Load Paths (4.1 10)- Masonry Details (4.2 16)- Use of Connectors and Brackets (4.3 17)

WALL SYSTEMS- Housewrap (5.1 23)- Roof-to-Wall and Deck-to-Wall Flashing (5.2 24)- Siding Installation in High-Wind Regions (5.3 25) Updated- Attachment of Brick Veneer in High-Wind Regions (5.4 New)

OPENINGS- Window and Door Installation (6.1 22)- Protection of Openings - Shutters and Glazing (6.2 26) Updated

ROOFING- Roof Sheathing Installation (7.1 18)- Roof Underlayment for Asphalt Shingle Roofs (7.2 19)- Asphalt Shingle Roofing for High-Wind Regions (7.3 20)- Tile Roofing for High-WindAreas (7.4 21)- Minimizing Water Intrusion through Roof Vents in High-Wind Regions (7.5 New)- Metal Roof Systems in High-Wind Regions (7.6 New)


ATTACHMENTS- Enclosures and Breakaway Walls (8.1 27) Updated- Decks, Pools, and Accessory Structures (8.2 28)- Protecting Utilities (8.3 29)

REPAIRS- Repairs, Remodeling, Additions and Retrofitting - Flood (9.1 30) Updated- Repairs, Remodeling, Additions and Retrofitting - Wind (9.2 30) Updated

GUIDE- References and Resources (G.2 31) Updated

Updated Home Builder's Guide to Coastal Construction ...

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