710
Design Rationale: The Space Module
3. Sequence of Structural Types
The placement of columns in these permissible locations produces a
sequence of structural types - single span, cantilever and double span -
which satisfies the planning requirements with great economy. (See
Structural Rationale Section 720.)
4. Other Permanent Vertical Elements
The requirements for uninterrupted space are also satisfied by the
exclusion of other permanent vertical elements (air shafts, piping and
electrical risers, equipment rooms, stairs, elevators and other transport
systems) from the space modules.
712.2.2
Relation of Bay Width to Space Use
The coordination of bay widths with the critical dimensions of one-, two-
and four-bed rooms (as described in Section 230):
1. Produces, in the case of a building programmed for one- and four-bed
rooms, and possessing the capability to convert to two-bed rooms, an
overall length which is significantly less than that required for a bay
spacing designed to accommodate either a four-bed room, a pair of
two-bed rooms or a pair of one-bed rooms.
2. Produces one-, two- and four-bed rooms which are very close to the
recommended critical dimensions. The usual compromise solution
produces one- and four-bed rooms which are wider than necessary,
and a two-bed room which is not really wide enough to allow the
passage of one bed past the second.
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