350
Plumbing Distribution: Organization
352
ORGANIZATION
The spacial organization of the service zone and the service bay are
discussed in Sections 223 and 224, and the following description defines
the relationship of the plumbing subsystem to this organization.
352.1
SERVICE ZONE
352.1.1
Subzones
The main distribution will be run in subzone S3 and all branches will be
located in S2. The pressure pipe drops to the functional zone will make
any required offsets in the S5 subzone. The range of trap and fall
dimensions for the branch drains are discussed in Section 353.2, and with
the required structural beam depths will form the criteria for the depth of
the S2 subzone (See Figure 350-2).
352.1.2
Channels
The plumbing mains will be horizontally distributed in a reserved subzone
located on the same side of the service zone as the plumbing shaft. In
areas of heavy demand, such as nursing units, supplementary runs of
medical gases for instance can be run on the opposite side of the zone.
The main drain will in any case be divided to run on each side of the girder
in the service zone (See Figure 350-3).
The plumbing channels will be organized to carry the maximum design
distribution in terms of number and size of pipes. Sleeves for the drains
will be located in the shear wall at the lowest point in the subzone.
352.2
GENERAL
Plumbing services not initially required in a service module will have
capped-off tees and valves in the plumbing risers. All control valves to
any services will be placed at the main in the service bay to concentrate
controls. The only exceptions will be the control valves to hazardous
gases such as oxygen. These must be placed in the functional zone, fed
from the service zone. Typical locations might be a corridor in a nursing
unit, or the operating room of a surgical suite. The main distribution pipes
should be provided with valved tees at increments along their length for
potential branch piping.
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