MIL-HDBK-1191
utilities shall be anchored/braced to resist the seismic forces, and if
damaged, be restorable within several days. Facilities with this design level
will continue operation with outside assistance for inpatients and disaster
victims with temporary expansion of emergency facilities.
6.3.3
Selected/Full.
This level of design, which is equivalent to an
immediate occupancy Structural Design performance level as defined in TI 809-
04, provides a higher level of seismic resistance capability than the
"Partial" level. This level of seismic performance will generally apply to new
facilities located in areas where the design spectral response acceleration at
short periods (SDS) is greater than 0.167 but less than 0.50. Health
facilities with a full level of seismic performance will be designed to be
prepared for post-earthquake operations and capable of restoration of minor
damage within several hours following the maximum design seismic ground
motion. All utilities and equipment must be prepared for isolation and/or
restoration with minimum work when damage occurs. Provision for temporary
emergency connection or augmentation of potable water, sanitary sewers and
fuel will be required. In existing facilities where upgrade of all portions
of the facility is economically impractical, upgrade may be restricted to the
more critical spaces and systems identified in the program authority document.
6.3.4
Complete. The complete level of seismic resistance, which is
equivalent to an immediate occupancy Structural Design performance level as
defined TI 809-04, is the maximum level of seismic design for military health
care facilities. This complete level of seismic performance applies to
facilities located in areas with a high seismic risk, i.e., areas where the
0.50. At this level, the facility will be designed for complete continuity of
operation, for medical care of inpatients and for receiving earthquake
casualties. Additionally, provisions for emergency supply and capability to
operate a hospital immediately after a disastrous earthquake for at least a 4-
day period will be made, i.e., water supply, electrical generation, fuel
storage, and sanitary facilities. All site utilities and systems which are
dependent upon outside sources during normal operations must be completely
restorable within a 4-day period. Isolation and damage control will be
provided to completely restore the facility to a near normal interior
environment within several hours.
6.4
General Design Considerations. Seismic design for a health care
facility requires consideration of the site geologic site hazards and ground
motions, building configuration, Structural Design systems, spatial
allocation, design of glazing, exterior facings, functional space utilization,
mechanical systems, electrical systems, communication systems, interior
partitions, finishes, and furnishings. Base design for seismic conditions on
the seismic use group, the level of seismic ground motion at the site, and
seismic performance level, all as defined in TI 809-04. See Section 5,
Structural Design for other seismic considerations related to building layout
and performance.
6.5
Post-Earthquake Emergency Status. The disaster magnitude and the
estimated duration of the post-earthquake emergency period must be reviewed
and their impact on the operations of the facility assessed. The extent of
curtailment, relocation, and expansion of services; the demands placed on on-
site storage of potable water, fuel, sewage, and medical supplies; and the
best design solutions to achieve and preserve functionality will be determined
from these estimates.
6-2
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