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Example Service Module: General Characteristics
For instance, the HVC branches are placed only one branch per hanger
space in this example. It could happen that the density of supply and
exhaust branches in some hospital areas would require more. This can
be done, and schemes with other beam and hanger spacings would need
their own assessment. But to prevent local overcrowding of services and
preserve reasonable future access through the ceiling, this kind of general
constraint, such as limiting the number of duct branches, will be
necessary. The S5 subzone is shown as approximately twelve inches
deep to accommodate the lateral branches including the flexible duct
connections to the HVC system. The latter are limited to a maximum of
twelve feet in length and a maximum of ten inches in diameter.
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