Floor Level
Renumbering
INTERSTITIAL LEVELS
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Interstitial level is floor level that is not
accessible to the public. Generally
these types of levels have building
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support equipment. Most buildings do
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not have interstitial levels.
Label this floor level "I".
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When a building is on a sloping site, the
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first floor is the level which patient and
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visitors enter the building, as a main
entrance, and enter into a main lobby
reception area.
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The lower level is then designated a
basement, even though it is at grade.
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Older buildings which were constructed
with a staircase leading up a flight or
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partial flight of stairs to the main level,
typically had this level designated a the
first floor and the level below labeled as
the ground floor or basement.
If Ground Floor is used as a
designation, change it to Basement.
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02/2005
Page 9-4
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