720
Design Rationale: Services
724.2
PLUMBING
724.2.1
Independent Layouts for Each Service Module
Each service module contains its own layout of mains and branch
distribution fed from the common risers in the service bays. This allows
each service zone to have easily identifiable maintenance valving and
controls. It also provides independent capacity to change pressure
systems and branch layouts without interfering with adjacent modules.
724.2.2
Adaptability
The pressure systems and drainage main distribution runs should be
oversized and have blanked-off tees at every hanger space. These mains
can be considered permanent installations. But as the pipes are not
difficult to add to or supplement like the HVC mains, the secondary
subzone will contain enough room to allow modification of these mains in
the future. All branch distribution can be considered adaptable as the runs
are easily modified when change occurs in the functional zone.
724.3
ELECTRICAL
724.3.1
Distribution from Substations to Service Bays
The distribution of power from the main distribution boards must be via
easily accessible busducts to the stacks of service bays. This will provide
the necessary degree of freedom for adjustment of load for each service
module as future functional requirements demand.
724.3.2
Independent Electrical Rooms and Distribution
to each Service Module
The entry of the power distribution systems to each service module must
be through an electrical room in the service bay where all circuits are
controlled so that all changes for the module can originate there with no
interference to other modules.
724.3.3
Adaptability
The main distribution wireways in the service zone can be considered
permanent with the freedom to change branch circuits within the wireway.
The wireways and conduit in the branch distribution and lateral runs are
considered adaptable to change as required by functional zone demands.
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