Updated Home Builder's Guide to Coastal Construction Technical Fact Sheets

Transcription

1 Updated Home Builder's Guide to Coastal Construction Technical Fact Sheets Manuel Perotin, PE, CFM Agenda Background & General Information New Fact Sheets & Guidance Resources FEMA Guidance/Publications 1

2 Background & General Information Original FEMA 499 Publication August Fact Sheets Updated FEMA P-499 December Fact Sheets Background & General Information Updated FEMA P-499 Developed in association with the National Association of Home Builders Research Center Review/Input Brick Industry Association Insulating Concrete Form Association International Window Film Association Structural Insulated Panel Association Several Other 2

3 Background & General Information Updated FEMA P-499 New Standards and Guidance ASCE 7-10 Wind Speeds for some sheets 2009 International Residential Code Lessons learned since previous version (Hurricane Katrina, Hurricane Ike, etc.) Ongoing FEMA 55 Coastal Construction Manual Update Latest NFIP Regulatory Requirements Background & General Information Updated FEMA P-499 Organized into 10 Categories General Planning Foundations Load Paths Wall Systems Openings Roofing Attachments Repairs Guide 3

4 New Fact Sheets Designing for Flood Levels Above the BFE(1.6) Outlines design and construction practices that reduce the likelihood of flood damage in the event that flood levels exceed the BFE FIRM and Flood Risk Consequences of Flood Levels Exceeding the BFE Recommendations Potential impacts on Flood Insurance Premium New Fact Sheets Designing for Flood Levels Above the BFE(1.6) Adding freeboard to the BFE ASCE requires 0 to 2 of freeboard depending on the building importance 2009 IRC requires 1 of freeboard in V Zones and Coastal A Zones General Recommendation Older FIRM - ASCE 24-05, plus 3 feet New DFIRMs - freeboard elevation specified by ASCE

5 New Fact Sheets Non-Traditional Building Materials & Systems(1.8) Guidance on non-traditional building materials and techniques and their appropriate application in coastal environments New Fact Sheets Non-Traditional Building Materials & Systems(1.8) Engineered Wood Products Structural Insulated Panels (SIPs) Insulating Concrete Forms (ICFs) Prefabricated Shear Walls and Moment Frames Sprayed Closed-Cell Foam Insulation Advanced Wall Framing Modular Houses 5

6 New Fact Sheets Attachment of Brick Veneer in High-Wind Regions (5.4) Guidance on practices for installing brick veneer that will enhance wind resistance ACI 530/ASCE 5/TMS 402: Building Code Requirements for Masonry Structures Brick Industry Association Technical Notes Construction Guidance Tie Installation New Fact Sheets Minimizing Water Intrusion through Roof Vents in High-Wind Regions (7.5) Guidance for minimizing water intrusion through roof vent systems that can lead to interior damage and mold growth in highwind regions 6

7 New Fact Sheets Minimizing Water Intrusion through Roof Vents in High-Wind Regions (7.5) Soffit Vents Ridge Vents Gable End Vents Off-Ridge Vents Gable Rake Vents Turbines New Fact Sheets Metal Roof Systems in High-Wind Regions (7.6) Guidance for designing and installing metal roof systems that will enhance wind resistance Metal Roofing Options Standing-Seam Hydrostatic (i.e., waterbarrier) Systems Hydrokinetic(i.e., water-shedding)panels Metal Shingles Construction Guidance 7

8 Summary of Coastal Construction Requirements and Recommendations for Flood Effects (1.2) Recommendations for exceeding NFIP regulatory requirements concerning coastal construction 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 to coastal builders, and explain how to obtain FIRMs, DFIRMs, and FISs Area of Moderate Wave Action (MOWA) Sample DFIRM 8

9 Lowest Floor Elevation (1.4) Outline the benefits of exceeding the NFIP minimum elevation requirements; identify common NFIP violations; and discuss the NFIP Elevation Certificate Enhanced best practices (specifically Coastal A Zones) Guidance on Elevation Certificates latest FEMA V Zone Design and Construction Certification(1.5) Outline the V Zone requirements of the NFIP to verify that the design of the foundation, lowest floor elevation, and foundation anchorage requirements Revised Example V Zone Certificate Updated to the 2009 IRC requirements Refers to ASCE 7-05 and

10 Coastal Building Materials (1.7) Guidance and best practices on selecting building materials to use for coastal construction Enhanced best practices from lessons learned and recommendations specifically related to August 2008 update of FEMA Technical Bulletin 2 Flood Damage Resistant Materials Requirements Foundations in Coastal Areas(3.1) Guidance on foundation types suitable for coastal environments Integrates ASCE guidance Coastal A Zone Lessons learned/recommendations from Hurricane Katrina and Ike MAT Reports 10

11 Pile Design and Installation (3.2) Guidance on pile design and installation Guidance on erosion and scour Integrates FEMA 550 guidance Lessons learned/recommendations from Hurricane Katrina and Ike MAT Reports Wood Pile-to-Beam Connections (3.3) Guidance related to typical wood pile-tobeam connections Built-up beams Connectors must meet IRC corrosion protection requirements and be compatible with the wood variety selected for construction 11

12 Reinforced Masonry Pier Construction (3.4) Guidance related to masonry pier construction where they are an acceptable alternative 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 installation tips for various types of siding that will enhance wind resistance Guidance from ASTM E2266, Standard Guide for Design and Construction of Low-Rise Frame Building Wall Systems to Resist Water Intrusion Detailed methods for wind resistance Sustainable design 12

13 Protection of Openings-Shutters & Glazing(6.2) Provide general information about the selection and installation of opening protection in windborne debris regions Revised guidance based on latest opening requirements in codes (IRC), standards (ASCE 7), and APA guidance Enclosures and Breakaway Walls (8.1) Guidance related to enclosures and breakaway walls below BFE Obstruction Considerations and the NFIP Flood Insurance Manual Lattice versus solid breakaway walls Lessons learned/observations from Hurricane Ike 13

14 Repairs, Remodeling, Additions and Retrofitting Flood (9.1) & Wind (9.2) Guidance related to best practice recommendations for repairs, remodeling, and additions, and propose opportunities for retrofitting 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 to topics covered in FEMA P-499 material from: American Wood Council Brick Industry Association Metal Construction Association National Roofing Contractors Association Masonry Society Timber Pile Council Vinyl Siding Institute 14

15 Updated Home Builder's Guide to Coastal Resources Resources 1. Openings in Foundation Walls and Walls of Enclosures (2008) 8. Corrosion Protection for Metal Connectors in Coastal Areas (1996) 2. Flood Damage-Resistant Materials Requirements (2008) 9. Design and Construction Guidance for Breakaway Walls (2008) 3. Non-Residential Floodproofing (1993) 10. Ensuring that Structures Built on Fill In or Near Special Flood Hazard Areas are Reasonably Safe from Flooding (2001) 4. Elevator Installation (1993) 5. Free-of-Obstruction Requirements (2008) 6. Below-Grade Parking Requirements (1993) 11. Crawlspace Construction for Buildings Located in Special Flood Hazard Areas are Reasonably Safe from Flooding (2001) 7. Wet Floodproofing Requirements (1993) 15

16 Updated Home Builder's Guide to Coastal References (In progress) Coastal Construction Manual Update Flood Code Master ASCE 24 Update Questions Flood/Wind Building Science Helpline (866) FEMA Publication Warehouse (800)

17 Updated Home Builder's Guide to Coastal GENERAL - Coastal Building Success and Failures (1.1 1) - Summary of Coastal Construction Requirements and Recommendations for Flood Effects (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 - Selecting a Lot and Siting the Building (2.2 7) 6) 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) 17

18 Updated Home Builder's Guide to Coastal 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-Wind Areas (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 - Repairs, Remodeling, Additions and Retrofitting - Wind (9.2 GUIDE - References and Resources (G.2 30) Updated 30) Updated 31) Updated 18