FEMA P-499: Home Builder's Guide to Coastal Construction

Recommendations

Info

1 GENERAL Coastal Construction Requirements and Recommendations V Zone Coastal A Zone A Zone Repairs, Remodeling, and Additions [See Fact Sheet No. 9.1] Reconstruction of Destroyed or Razed Building NFIP 60.3(e)(5) and 60.3(c)(5) Moving Existing Building NFIP 60.3(e)(5) and 60.3(c)(5) Manufactured Housing Requirement: Where the entire building is destroyed, damaged, or purposefully demolished or razed, the replacement building must meet current NFIP requirements concerning new construction in V Zones, even if it is built on the foundation from the original building (see Fact Sheet Nos. 1.4, 1.5, 9.1). Requirement: Where the existing building is moved to new location or site, the relocated building must meet current NFIP requirements concerning construction in V Zones (see Fact Sheet Nos. 1.4, 1.5, 9.1). Recommendation: Follow the V Zone requirement for building elevation and open foundations. Requirement: Where the entire building is destroyed, damaged, or purposefully demolished or razed, the replacement building must meet current NFIP requirements concerning new construction in A Zones, even if it is built on the foundation from the original building (see Fact Sheet Nos. 1.4, 9.1). Recommendation: Follow the V Zone requirement for building elevation and open foundations. Requirement: Where the existing building is moved to new location or site, the relocated building must meet current NFIP requirements concerning construction in A Zones (see Fact Sheet Nos. 1.4, 9.1). Requirement: Where the entire building is destroyed, damaged, or purposefully demolished or razed, the replacement building must meet current NFIP requirements concerning new construction in A Zones, even if it is built on the foundation from the original building (see Fact Sheet Nos. 1.4, 9.1). Recommendation: Elevate bottom of lowest horizontal structural member at, or above, BFE (see Fact Sheet No. 1.4). Requirement: Where the existing building is moved to new location or site, the relocated building must meet current NFIP requirements concerning construction in A Zones (see Fact Sheet Nos. 1.4, 9.1). Additional Resources IBC: 1810.1.2, 105.1, K103.1 IRC: R105.1, AJ501.3, AJ501.4, AJ501.5.1, AJ501.5, AJ501.5.1, AJ501.5.2, AJ501.5.3, AJ501.5.3.1, AJ501.5.3.2, AJ501.5.3.3, AJ501.5.3.4 AJ501.5.3.5, AJ501.6, AJ501.7, AJ501.8, AJ501.8.1, AJ501.8.2, AJ501.8.3 ASCE: N/A Other: FEMA 550 IBC: 3410.1 IRC: AE102.6 ASCE: ASCE 7 Sec. 1.6 Other: FEMA 550 General IRC: R322.1.9, App. AE101 ASCE: Not Applicable Other: FEMA 85 10 of 10 12/10 Developed in association with the National Association of Home Builders Research Center 1.2: SUMMARY OF COASTAL CONSTRUCTION REQUIREMENTS AND RECOMMENDATIONS HOME BUILDER’S GUIDE TO COASTAL CONSTRUCTION
Using a Digital Flood Insurance Rate Map (DFIRM) HOME BUILDER’S GUIDE TO COASTAL CONSTRUCTION Technical Fact Sheet No. 1.3 Purpose: To explain the purpose of Flood Insurance Rate Maps (FIRMs), Digital Flood Insurance Rate Maps (DFIRMs), highlight features that are important to coastal builders, and explain how to obtain FIRMs, DFIRMs, and Flood Insurance Studies (FISs). What Is a FIRM? Flood-prone areas are studied by engineers and hydrologists that specialize in analysis of streams, rivers, tidal shorelines, and their adjacent floodplain or coastal area. These published studies, known as the community’s FIS, provide detailed information on the study area that facilitates the creation of flood maps. FISs are usually produced for the highest risk streams, most rivers, and almost all coastal reaches. FEMA has mapped flood hazards for nearly 20,000 communities in the United States, most commonly on FIRMs. Most of the nation’s FIRMs were converted during the past five years through the Map Modernization Program into a digital product that depicts flood-prone areas for a community. These are known as Digital Flood Insurance Rate Maps, or DFIRMs. Effective October 1, 2009, FEMA discontinued the distribution of paper maps. Paper FIRMs were replaced with DFIRMs. The FIRM for your specific site can be viewed online and reproduced by creating a printable FIRMette1 that can be downloaded to a personal computer. DFIRMs show the delineation of the Special Flood Hazard Areas (SFHAs) – land areas subject to inundation by a flood that has a 1-percent probability of being equaled or exceeded in any given year (hence, the terms “1-percent-annual-chance flood” and “100-year flood”). SFHAs are shaded on the DFIRM and are divided into different flood zones, depending on the nature and severity of the flood hazard. DFIRM datasets have been provided to your local community and are available for viewing at the local National Flood Insurance Program (NFIP) coordinator’s office. FIRMs and DFIRMs Are Used By: n Communities, to regulate new construction* (e.g., foundation type, lowest floor elevation, use of the enclosed areas below the lowest floor). n Designers and Builders, to determine flood hazards and plan new construction per community ordinance and code requirements. n Lenders, to determine whether flood insurance is required for federally backed mortgages. n Insurance Agents, to establish flood insurance premiums. n Land surveyors and engineers, to complete National Flood Insurance Program (NFIP) elevation certificates (see Fact Sheet No. 1.4, Lowest Floor Elevation). * Note that new construction may include some additions, improvements, repairs, and reconstruction. Consult the community about substantial improvement and substantial damage requirements. 1 FIRMettes are user-selected portions of flood maps available through the FEMA Map Service Center. 1.3: USING A DIGITAL FLOOD INSURANCE RATE MAP (DFIRM) HOME BUILDER’S GUIDE TO COASTAL CONSTRUCTION 1 of 4 12/10 GENERAL 1
Page 1: Home Builder’s Guide to Coastal C
Page 4 and 5: G GUIDE 2 of 6 12/10 Fact Sheet No.
Page 6 and 7: G GUIDE 4 of 6 12/10 Fact Sheet No.
Page 8 and 9: G GUIDE 6 of 6 12/10 Category Categ
Page 10 and 11: 1 GENERAL What Should Owners and Ho
Page 13 and 14: Summary of Coastal Construction Req
Page 15 and 16: Foundation Orientation of Lowest Ho
Page 17 and 18: Certification Elevation NFIP 60.3(b
Page 19 and 20: Coastal Construction Requirements a
Page 21: Coastal Construction Requirements a
Page 25 and 26: Sample DFIRM This map is a portion
Page 27 and 28: Lowest Floor Elevation HOME BUILDER
Page 29 and 30: V Zone Design and Construction Cert
Page 31 and 32: Designing for Flood Levels Above th
Page 33 and 34: FIRMs depict the limits of flooding
Page 35 and 36: Figure 6. Mold and biological/chemi
Page 37 and 38: Other Considerations As previously
Page 39 and 40: Coastal Building Materials HOME BUI
Page 41 and 42: Location of Material Use Name of Ma
Page 43 and 44: n Metal-plate-connected trusses sho
Page 45 and 46: Non-Traditional Building Materials
Page 47 and 48: Things to consider if building with
Page 49 and 50: Figure 5. An example of a wall cavi
Page 51 and 52: Moisture Barrier Systems HOME BUILD
Page 53 and 54: How Do Siting and Design Decisions
Page 55 and 56: Selecting a Lot and Siting the Buil
Page 57 and 58: Foundations in Coastal Areas HOME B
Page 59: prohibited in V Zones but are recom
Page 62 and 63: 3 FOUNDATIONS Table 1. Example foun
Page 64 and 65: 3 FOUNDATIONS Additional Resources
Page 66 and 67: 3 FOUNDATIONS 2 of 6 12/10 Figure 2
Page 68 and 69: 3 FOUNDATIONS 4 of 6 12/10 Figure 4
Page 70 and 71: 3 FOUNDATIONS Additional Resources
Page 72 and 73:
3 FOUNDATIONS Piers vs. Piles Pier
Page 75 and 76:
HOME BUILDER’S GUIDE TO COASTAL C
Page 77:
If a stemwall and floor slab system
Page 80 and 81:
4 LOAD PATHS If a connection fails,
Page 82 and 83:
4 LOAD PATHS Gable end wall - cut c
Page 85 and 86:
Use of Connectors and Brackets HOME
Page 87 and 88:
Important These are examples of typ
Page 89 and 90:
Housewrap HOME BUILDER’S GUIDE TO
Page 91:
n Improper integration with flashin
Page 94 and 95:
5 WALL SYSTEMS 2 of 3 12/10 Figure
Page 97 and 98:
Siding Installation in High-Wind Re
Page 99 and 100:
n Use aluminum, galvanized steel, o
Page 101 and 102:
Figure 8b. Wood siding installation
Page 103 and 104:
Energy Conservation and Air Barrier
Page 105 and 106:
Attachment of Brick Veneer in High-
Page 107 and 108:
Construction Guidance The brick ven
Page 109:
Table 1. Brick Veneer Tie Spacing N
Page 112 and 113:
6 OPENINGS Although not discussed i
Page 115 and 116:
Protection of Openings- Shutters an
Page 117 and 118:
What Types of Shutters Are Availabl
Page 119 and 120:
Are There Special Requirements for
Page 121 and 122:
Roof Sheathing Installation HOME BU
Page 123:
Common Sheathing Attachment Mistake
Page 126 and 127:
7 ROOFING 5. Apply a single layer o
Page 129 and 130:
Asphalt Shingle Roofing for High Wi
Page 131:
After the shingles have been expose
Page 134 and 135:
7 ROOFING Design and Construction G
Page 137 and 138:
Minimizing Water Intrusion Through
Page 139 and 140:
Checking Soffit Material Installati
Page 141 and 142:
Figure 8. This metal ridge vent was
Page 143 and 144:
Gable Rake Vents Key Issues n Gable
Page 145 and 146:
Metal Roof Systems in High-Wind Reg
Page 147 and 148:
Construction Guidance n Consult loc
Page 149:
Additional Resources For general in
Page 152 and 153:
8 ATTACHMENTS Space Below the BFE
Page 154 and 155:
8 ATTACHMENTS n Siding used on the
Page 157 and 158:
Decks, Pools, and Accessory Structu
Page 159 and 160:
uildings. Pools can be designed to
Page 161 and 162:
Purpose: To identify the special co
Page 163:
Fuel n Fuel tanks should be install
Page 166 and 167:
9 REPAIRS n Pre-FIRM or post-FIRM b
Page 168 and 169:
9 REPAIRS n If a lateral addition c
Page 170 and 171:
9 REPAIRS Enclosures of Areas Below
Page 173 and 174:
Repairs, Remodeling, Additions, and
Page 175 and 176:
Vertical additions may also impose
Page 177 and 178:
n Soffits should be inspected follo
Page 179 and 180:
References and Resources HOME BUILD
Page 181 and 182:
FEMA. NFIP Technical Bulletin 5-08,
show all

FEMA P-499: Home Builder's Guide to Coastal Construction

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?