I
DG 1110-3-106
Table 4-1 Criteria for Conference Classrooms.
Space Criteria
25-35 s.f./student: based on seating with individual
Area/Student
2-ft. x 3-ft. desks, adequate circulation area, platform
area (lecture or demonstration), A-V projection space
and coat storage.
10 ft.
Ceiling Height
Reference: TM 5-809-1, Structural Design
Floor Loading
Student sight lines are critical; depending on the size
Special Characteristics
of audience and nature of the presentation, platforms
for instructors and risers for seating may be required.
Reference: NFPA-101
Seating Spacing
Environmental
Thermal
Temperature, maintained operation
area having a thermostat.
50-60%
Relative humidity
10 cfm (minimum)
Outside air required/person
6 per hour (minimum)
Air changes
40 cfm (maximum)
Air movement
Positive
Air pressure
35% (minimum using NBS dust spot test)
Air filtration efficiency
Lighting
30 fc. (maintained)
General lighting level
50 fc. (maintained)
Chalkboard task lighting
30 fc., reference: para 3-4f(2)
A-V lighting level
70, reference: IES Lighting Handbook Applications
Visual comfort probability
Volume
70-90%
Surface reflectance: Ceiling
40-60%
Walls
30-50%
Floor
Yes
Daylighting
North or south
Window orientation
Enclosing wall sound rating:
STC 45
Between instructional spaces
STC 40
Between instructional spaces and corridors
Reflective
Sound reflectance: Ceiling
Reflective
Walls: Front
Reflective
Side
Absorptive, NRC 25 (minimum)
Back
Absorptive, NRC 25 (minimum)
Floor
Service Criteria
Electrical
110 v
Power
Telephone/intercom clock control as programmed
Signal (low voltage)
Reference: paragraph 3-2g
Adaptability
4-15
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