220
The Service Module
221
BASIC DESIGN
The service module is a unit of space, one floor in height, served by its
own service distribution system including the air-handling unit.
In plan, the service module consists of a number of typical structural bays
plus a service bay. In section, the service module consists of the service
bay, a functional zone and a service zone.
Air-handling units and/or supply and exhaust ducts, electrical equipment,
and all vertical piping and risers are located in the service bay.
Distribution from the bay to the functional zone is via the service zone
above the ceiling. (See Figure 220-1). Therefore, the functional zone is
free from the constraint of vertical service penetrations.
Dimensional characteristics of service modules are determined by the
space modules, by the service content and service organization necessary
to support the activities housed, and by the overall structural
characteristics required for resistance of lateral forces.
The optimum size for an independent service module is about 10,000
square feet, which represents a good compromise between largeness for
economy and smallness for adaptability. The actual area of the service
module, exclusive of the service bay, will vary according to the size of the
structural bay and the plan configuration, and may range from 5,000 to
20,000 square feet, which is currently the maximum size for a fire section.
221.1
BENEFITS
The service module is the most significant of all the planning components
in that it combines and coordinates all the interrelated characteristics of
building organization, namely, function, structure, service distribution and
fire safety.
221.1.1
Design
The integration of these characteristics within a single unit of space
provides the opportunity to conceptualize a building as an assembly of
"building blocks".
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