Glossary
INTERFACE. 1. a common boundary between two systems or
components. 2. a boundary detail designed to maintain a specified
relation between adjacent systems or components.
INTERSTITIAL SPACE. unfinished or non-habitable space utilized for
building service subsystems, of sufficient size to accommodate workmen
and permit maintenance and alteration without disruption of activities in
functional spaces. The term usually refers to the space between a ceiling
and the floor above. See SERVICE ZONE.
LEAD TIME. the length of time preceding an event which must be
allowed for all prerequisite activities if the event is to have reasonable
chance of occurring as scheduled.
LIFE COST. total owning cost during life span.
LIFE SPAN. 1. the period between the manufacture of a system or
component and the time at which its annual owning cost exceeds the
annual owning cost of a replacement. 2. the period between the
manufacture of a system or component and the time at which it can no
longer meet the needs of its user. 3. the shorter of the two above
periods.
LONG TERM COST. total owning cost over a specified period of time,
typically a theoretical life span.
MODULAR. 1. having commensurable dimensions. 2. capable of
arrangement with exact fit in more than one sequence or direction. 3.
composed of or containing predetermined dimensional and/or functional
units such as repetitive structural bays or service modules.
MODULAR COORDINATION. dimensional coordination utilizing
commensurable dimensions.
MODULE. 1. the common divisor of a set of commensurable dimensions.
2. a dimensional pattern restricting the location of a specified building
component. 3. a unit of space defined by a special set of dimensional
and/or functional characteristics.
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