DG 1110-3-106
Table 5-2
Suggested STC Ratings for Acoustic Separation
b. A high-rise school building (more than four stories)
necessary to plan circulation routes to be as direct as
would normally be serviced by elevators designed to
possible.
move 80% of the occupants vertically during the peak
class change period. Although high-rise buildings are
(4) Space organization must consider acoustic
normally very compact, inclusion of a high-rise in an
separation in relation to adjacency of functions. The
otherwise low-rise school complex may considerably
noise produced by many school activities and training
reduce the allowable maximum walking distance.
equipment must be attenuated if acceptable noise levels
are to be maintained in instructional areas. The
acoustic separation matrix (Table 5-2) converts noise
c. Walking distances define the diameters of circular
level data into acoustic separation criteria. These criteria
planning areas for service school facilities. Potential
may be met in a variety of ways. Shops and
expansion of schools must also be programed to take
classrooms, for example, should be in close proximity
place within the limits of these orginal planning areas.
but not intermixed; they should be separated by
(Figure 5-l). Of course, planning a facility within one of
sufficient open space (Figure 5-2), by corridors (Figure
these areas does not guarantee that the maximum
5-3), or by a combination of corridors and storage
walking distances will not be exceeded; it is still
5-3
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