June 2006
requires the project team to make basic engineering assumptions for structure and building ser-
vice systems. The level of detail required is greater than that for typical block or preliminary de-
sign. Engineering and systems design is then no longer tied to the development of detailed or
"final" room and department layouts. Design development and construction documents for the
integrated systems can start earlier than normal. Application of the VAHBS places a premium
on examining and coordinating the interrelationships of building services and subsystems early
during design.
Modularity, redundancy, and use of typical or repetitive elements in the design of the building
systems will reduce the number of "special" conditions. This may simplify the preparation of
documents and may make greater efficiencies in procure-
ment and installation possible. Modularity not only promotes
a learning curve increasing productivity for the workmen as
the building progresses, but it also allows pre-fabrication for
many components or sub-systems (duct runs, piping, wire-
way, etc.).
Since the design is more "adaptable," the building systems
will require fewer modifications or redesign due to changes
in the functional plans. Multiple or phased bid packages can
be developed and priced with a greater degree of confi-
dence.
Use of assigned subzones and channels, and integration of
VA Medical Center
system during design will reduce conflicts and changes in
Portland, OR, 1984
the field. However, the Contractor still must closely coordi-
nate the work of the various trades and enforce the "rules" established for the service zones.
Remodel and Renovation
The VAHBS includes features that should facilitate the work and reduce impacts on occupied
spaces in or adjoining the area of the work. The potential advantages of these features must be
clearly communicated to bidders so that benefits in schedule (and consequently costs) may be
realized. These features are intended to contain the impacts of the work to as limited an area as
possible. By reducing impacts to the functional zone and surrounding occupied areas of the
hospital, the need for temporary barriers, temporary utilities, phasing and "domino" moves may be
reduced or eliminated.
Features of the VAHBS that facilitate remodel and renovation include modular design, stacked
service bays, service risers separated from functional zones, location of service equipment
restricted to service bays (out of functional zones and interstitial area), provisions for access to
exterior for major equipment replacement, provision of accessible interstitial service zones with
dedicated subzones and channels; "over sizing" service mains, equipment rooms, shafts and
risers; use of non-bearing partition systems (including smoke and fire) that terminate at interstitial
platform; and coordination of fire zone and service module boundaries.
SUPPLEMENT TO RESEARCH STUDY REPORT
VA HOSPITAL BUILDING SYSTEM
SECTION 3-6
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