320
Ceiling: Generic Design Options
Option 2b would be used in conjunction with any mechanically fastened
finished ceilings. The metal runners would be fixed to the underside of the
platform in a regular, continuous grid, interrupted as necessary by the
head channel of the partitions. This regular grid would facilitate future
alterations, especially if used in conjunction with a totally accessible ceiling
system (such as Armstrong's Accessible Tile System, which could occupy
as little as 2-1/4" in depth).
Accessibility is highly desirable, not only because it facilitates alterations
but also because it enables maintenance of the acoustic seal at the head
of the partition.
322.2.3
Option 3: Interrupted Finished Ceiling Suspended from the Platform
This option provides the same advantages as Option 2b described above
and would probably be used only in conjunction with it, in those few
spaces where recessed lighting or equipment is an essential item.
The added space between the platform and the finished ceiling should
preferably not be used for service distribution elements which should be
exposed for easy access above the platform.
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