6.3 Suspended Ceiling Design Process - Bilkent University

time, round trip time, and number of elevators. This cycle represents the
activity of deciding on the number of elevators required in the building.
The second cycle in the process consists of the components between
the 22 nd and the 29 th parameters and it corresponds to the activity of
determining car width and depth. The critical parameters in this cycle
are average passenger transfer time, round trip time, number of
elevators, car door width, car width, and car depth.
The last cycle in the process involves 13 parameters and represents the
activity of deciding hoistway width and hoistway depth. The critical
parameters in this cycle are number of elevators, car door width, car
width, car depth, hoistway width, and hoistway depth.
One should pay attention to a larger possible cycle which contains all of
the three cycles mentioned above. This is shown with a darker
rectangle on the partitioned DSM and represents the relationship of the
elevator system with two building system level parameters, namely,
floor area and building structure layout. The width and depth of the
hoistway is an important consideration in architectural design at an
early stage especially in tall buildings. Proper assumptions should be
made about these parameters while the architect prepares the spatial
layout. Further changes are rather costly and difficult. Similarly, the
structural engineer should consider the hoistway dimensions while
preparing the initial structural layout. Structural costs are often reduced
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