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 c. Design using seismic isolation must receive written approval from Code
04CN.EH, Southwest Division.
d. Note that a design and test program peer review in accord with section
13.8.1 of the "NEHRP Seismic Provisions" is required.
6.8.2.10 Passive Energy Dissipation System Design: Design of passive energy
dissipating systems shall be in accord with the appendix to chapter 13 of the "NEHRP
Seismic Provisions."
a. Designs using passive energy dissipating systems must receive written
approval from Code 04CN.EH, Southwest Division.
b. Note that a design and test program peer review similar to that prescribed
in section 13.8.1 of the "NEHRP Seismic Provisions" is required.
6.8.2.11 Nonbuilding Structure Design: Design of Piers and Wharves shall comply with
"Technical Report TR-2069-SHR - Design Criteria for Earthquake Hazard Mitigation of
Navy Piers and Wharves" dated March 1997, distributed by NAVFACENGCOM, rather
than by the provisions of the "NEHRP Seismic Provisions."
All tanks and vessels shall be designed to meet the additional requirements of section
14.4.3.3 of the "NEHRP Seismic Provisions."
6.8.2.12 Cold Formed Metal Framing: Seismic design using light gage cold formed
metal framing shall comply with section 8.6 "Light-Framed Walls" of the "NEHRP Seismic
Provisions."
6.8.3
SEISMIC REHABILITATION DESIGN REQUIREMENTS
Seismic design shall comply with the requirements of the "NEHRP Recommended
Provisions for Seismic Regulations for New Buildings and Other Structures" (FEMA 302),
with the "Handbook for the Seismic Evaluation of Buildings A Prestandard" (FEMA 310)
and with the "NEHRP Guidelines for the Seismic Rehabilitation of Buildings" (FEMA 273)
when Performance Based Engineering (PBE) is specifically required.
Evaluations of existing buildings using (FEMA 310) shall generally be based on the Tier 3
evaluation procedures using linear static or linear dynamic analysis. No preliminary Tier 1
or 2 evaluation is required. For highly irregular buildings, Tier 3 detailed evaluation using
nonlinear static analysis may be required. The special URM bearing wall procedure may
be used when appropriate. Note that chapter 5 of (FEMA 310) permits seismic
evaluations to 0.75 x new design criteria as an acceptance standard, but requires
upgrades to 100% of new design criteria.
Existing buildings and other existing structures shall not be rehabilitated to "PBE based
Enhanced Performance Objectives" (seismic use groups II and III) unless specific
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