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TED 316 – Structural Design

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Building Classifications: Occupancies. TED 316 – Structural Design. Most things have classifications Objective classifications Drivers’ licenses Hazardous materials Tests and assignments (hopefully) Subjective classifications Social status Favorite movies. types of classifications.

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Presentation Transcript
types of classifications

Most things have classifications

    • Objective classifications
      • Drivers’ licenses
      • Hazardous materials
      • Tests and assignments (hopefully)
    • Subjective classifications
      • Social status
      • Favorite movies
types of classifications
building code classifications

Provide an essential building block in developing an effective building code

  • Occupancy
    • Based on how it will be used
  • Construction type
    • Based on the type of construction used
Building code classifications
occupancy classifications

Oversight organizations

    • Uniform Building Code (UBC)
      • First published in 1927
      • International Council of Building Officials
      • Promoted public safety & standardized safe construction
    • International Building Code (IBC)
      • Replaced the UBC in 2000
      • International Code Council (ICC)
      • ICC was a merger of:
        • International Council of Building Officials (ICBO) Uniform Building Code
        • Building Officials and Code Administrators International (BOCA) The BOCA National Building Code
        • Southern Building Code Congress International (SBCCI) Standard Building Code
    • Primarily used in North America
Occupancy classifications
occupancy defined

UBC definition:

    • “The purpose that a building, or part thereof, is used or intended to be used
    • Essentially how the building will be used
  • IBC
    • Does not specifically define occupancy
Occupancy defined
who determines occupancy code

UBC placed the responsibility on building official

Conflict with architects (designing without knowing code regulations)

IBC does not specify who

IBC states “structures will be classified with respect to occupancy”

Architects can legally determine occupancy code, building official can agree or not

Who determines occupancy code
occupancy groups

IBC has ten occupancy groups

Many have subgroups

Subgroups are numbered

Lower number = greater perceived risk

Occupancy groups
occupancy group assignments

Most assigned strictly on intended use/uses

  • Many building have areas that have different uses.
  • Using a fire department as an example:
    • Storage of equipment
    • Sleeping
    • Meeting
    • Office
  • Considered “mixed occupancies”
Occupancy group assignments
occupancy group assignments1

Incidental use areas

    • Provide minor support to main occupancy code
      • Storage, mechanical, specialty areas
    • Does not meet minimum size requirements
      • Assembly = 705 sq. ft.
      • Based on 50 people x 15 sq. ft. per person
Occupancy group assignments
occupancy groups1

Assembly: Groups A-1, A-2, A-3, A-4 and A-5

Business: Group B

Educational: Group E

Factory and Industrial: Groups F-1 and F-2

High Hazard: Groups H-1, H-2, H-3, H-4 and H-5

Occupancy groups
occupancy groups2

Institutional: Groups I-1, I-2, I-3 and I-4

Mercantile: Group M

Residential: Groups R-1, R-2, R-3 and R-4

Storage: Groups S-1 and S-2

Utility and Miscellaneous: Group U

Occupancy groups