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 5.18.10 Wall Finish Selections and Vapor Barrier Placement: Select
correct finish and provide correct location of vapor barrier in walls and
roof/ceiling of air conditioned and/or refrigerated facilities to minimize
moisture migration into rooms and prevent moisture condensation within
walls and roof/ceiling. Provide temperature gradient/dew point analysis of
walls and roof/ceiling.
5.19
STRUCTURAL:
5.19.1 Structural Engineering (Including Seismic): Select the structural
systems and materials that are suitable for the type of facility involved,
are capable of carrying the required loads, and are compatible with fire
protection requirements as well as the architectural and functional
building concepts.
5.19.2 Design Criteria: List design criteria, such as NAVFAC Design
Manuals (Structural Engineering Design Manuals) and NAVFAC P-355 (Seismic
Design for Buildings)(Refer to the following paragraph), used as Basis of
Design.
5.19.2.1 Seismic Design Policy. Seismic design criteria for new buildings shall be in
accordance with TI-809-04, Seismic Design For Buildings, dated December 1998. This manual
replaces both the NAVFAC P-355, Seismic Design for Buildings, 1992 and NAVFAC P-355.1, Seismic
Design Guidelines for Essential Buildings, 1986. However, the seismic design criteria for Non-
Building Structures and Utility Systems shall be in accordance with Chapters 13 and 14 of the
NAVFAC P-355. The primary basis for the new TI-809-04 is the 1997 Edition of the National
Earthquake Hazard Reduction Program (NEHRP) Provisions for Seismic Regulations for New
Buildings and Other Structures, Federal Emergency Management Agency (FEMA) document 302. A
copy of the TI-809-04 (PDF Format) can be obtained through the NAVFAC Criteria Office internet
address:
www.efdlant.navfac.navy.mil/Lantops_15/seismic_design_new_buildings.htm
The FEMA 302 publication can be obtained at no charge from the FEMA Report Distribution Center,
telephone number 1-800-480-2520 or FAX 1-301-497-6478.
TI-809-04 adopts the latest United States Geologic Survey (USGS) seismicity maps which provides
contour lines for various geographic locations. The USGS website,
geohazards.cr.usgs.gov/eq/html/genmap.shtml, provides detailed information on seismic hazards and
how to obtain acceleration and response values required for use by the new criteria.
5.19.2.2 Piers and Wharves. Seismic design criteria for piers and wharves
shall be in accordance with MIL-HDBK 1025/1, "Piers and Wharves" which
recommends the use of AASHTO, "Guide Specifications for Seismic Design of
Highway Bridges". However, NAVFAC P-355 Tables 3-1 and 3-2 will take
precedence over the seismic zone maps/acceleration coefficients in AASHTO,
except for Guam which shall be seismic Zone 4 and Diego Garcia, seismic
Zone 3. An equivalent acceleration coefficient shall be used for the
seismic zones found in NAVFAC P-355, Tables 3-1 and 3-2.
5.19.2.3
Seismic Upgrade.
a. Evaluation and Mitigation. Executive Order 12941 requires
mandatory evaluation and mitigation of unacceptable risks of any Federally
owned or leased facility that undergoes a rehabilitation, repair, and/or
modernization that is affected by any of the following situations:
5-17
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