5.5.2 AVOIDANCE OF EMI SOURCES
Avoid electromagnetic interference by locating EEG suites, neurosurgical
operating rooms, and other functional spaces housing EMI-sensitive
instrumentation with the following separation from sources:
A. At least 15 m (50 ft.) from elevator motors, air handling motors, and
electrical distribution transformers
B. At least 7.5 m (25 ft.) from electrical lines carrying 100 A (amperes) or
more
C. As far as practicable from hospital broadcasting and wireless stations
5.5.3 SIGNAL STRENGTH TEST
5.5.3.1 During the construction phase of the project after the structure has
been constructed but prior to installing the finish work in the neurosurgical
operating room, EEG and EMG suites, and other spaces housing EMI-sensitive
instruments, conduct a signal strength test to measure the field strength of
radio and television signals in these spaces if the building is located
within a mile of the following facilities:
A. A short-wave radio antenna transmitting at over 100,000 W (watts)
B. A VHF television or FM radio antenna transmitting at over 250,000 W
(watts)
C. A UHF television antenna transmitting at over 1,000,000 W (watts)
5.5.3.2 These tests are also required if the separation requirements given
above in paragraph 5.5.2 are not met. If signal strength exceeds 0.07 V/m
(volts/meter), then provide these areas with EMI shielding. (This may require
a floor slab depression; see Paragraph 2.4.2.1G)
5.5.3.3 An organization that has had previous experience in signal strength
measurements shall conduct the field tests and evaluate them over the entire
frequency spectrum up to 200 MHz (megahertz).
5.6 INTENSIVE CARE UNITS (ICUS)
A. Intensive Care Units are specialized nursing facilities for patients whose
conditions are too acute for conventional nursing units. They are categorized
as Medical, Surgical, Coronary Care, and, for small hospitals, General
Purpose. All ICUs, except Coronary Care, have one or more isolation rooms;
the remainders of the beds are in open-ended cubicles.
B. See Space Planning Criteria, Chapter 102, "Intensive Care Units", for room
sizes, design considerations, and relationship diagrams and matrices.
C. For complete criteria, see the other documents described in Article 1.2
above.
5.7 ISOLATION ROOMS
5.7.1 FUNCTION
5.7.1.1 Isolation rooms may either be negative isolation (for those whose
communicable diseases must be contained) or positive isolation (for those
whose immune systems cannot tolerate normal exposures), depending on the
difference in air pressure between the rooms and adjoining spaces.
ARCHITECTURAL DESIGN MANUAL
5-2
SPECIAL FUNCTIONS
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