Table 4-5 Criteria for Computer-Aided Instructional Classrooms.
Space Criteria
Area/Student
Computer carrels
Ceiling Height
Floor Loading
Reference: TM 5-809-1, Structural Design
Environmental
Thermal
Temperature, maintained operation
Relative humidity
50-60%
Outside air required/person
10 cfm (minimum)
6 per hour (minimum)
Air changes
40 cfm (maximum)
Air movement
Positive
Air pressure
Air filtration efficiency
35% (minimum using NBS dust spot test)
Lighting
30 fc. (maintained)
General lighting level
50 fc. (maintained)
Task-carrel lighting level
70, reference: IES Lighting Handbook Applications
Visual comfort probability
Volume
70-90%
Surface reflectance: Ceiling
Walls
30-50%
Daylighting
Yes
Window orientation
North or south
Enclosing sound wall rating:
Between instructional spaces
STC 45
Between instructional spaces and corridors
STC 40
Sound reflectance: Ceiling
Absorptive, NRC 50 (minimum)
Floor
Absorptive, NRC 25 (minimum)
Electrical
Power
110 V; 330 volt-amperes per carrel (minimum)
Telephone/intercom clock control as programmed
Signal (low voltage)
Reference: paragraph 3-2g
Adaptability
4-38
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