IBC - Code Analysis

(LAST UPDATED TO 2018 IBC)

DETERMINING BUILDING OCCUPANCY CLASSIFICATION(S)| 302

• 302.1 Formal designation of the Primary Purpose of the building, structure, or portion thereof

  • Area, Room, or Space with varying purposes

  • Multiple Occupancies

  • Occupied Roof Classification along with 503.1.4

• 303.1.1, 303.1.2 303.1.3, 303.1.4 Certain Assembly Spaces to be classified as other

• 305.1.1 Certain Educational Spaces to be classified as other

• 307.1.1 Sets requirements for hazardous operations to not be considered Group H Occupancy

• 311.1.1 Storage spaces accessory to other Classifications to be classified as the use it is accessory to

• 312.1.1 Rule for Classifying a greenhouse

• 508.1 Exception 3 indicates that uses in live/work units are not considered separate occupancies

• 510.2 Horizontal Building Separation Allowance lets you build a podium building

MIXED USE AND OCCUPANCY 508

• 508.2 Rules for Accessory Occupancies

  • 508.2.3 10% rule to be considered Accessory Occupancies.

• 508.3 Rules for Nonseparated Occupancies

• 508.4 Rules for Separated Occupancies

BUILDING HEIGHT & AREA

• Building height & Stories | Using Table 504.3 & 504.4

• Building area | Using Table 506.2 & Area equations

• Incidental Uses 509

• Special Provisions 510

CONSTRUCTION TYPES | TABLE 601

SPECIAL USE AND OCCUPANCY CATEGORIES | CHAPTER 4

Always check chapter 4 to see if there are any special requirements for the project type you are working on.

FIRE SPRINKLER REQUIREMENTS

• Building Height & Stories | Table 504.3, Table 504.4, Table 506.2

• Unlimited Area Buildings | 507.3, 507.4, 507.5, 507.6, 507.7, 507.9, 507.11, 507.12

• Incidental Uses | Table 509

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OCCUPANT LOAD | TABLE 1004.5

• How is the occupant load factor different from a building’s occupancy classification?

• How are occupant load factors affected by occupancy classifications? 1004.4

• How are occupant loads in areas without fixed seating calculated? Table 1004.5

  • What is the difference between a gross area calculation and a net area calculation as it relates to occupant load factors? Definitions “Floor Area, Gross” & “Floor Area, Net”.

• How are occupant loads in areas with fixed seating calculated? 1004.6

• How do outdoor areas affect occupant loads for the building? What about balconies in apartments? 1004.7

• What is a Concentrated Business Use Area and when does it apply? 1004.8

MIN REQ’D PLUMBING FACILITES 2902

• How are plumbing fixture calculations affected by occupant load factors? What about occupancy classification?

  • Is the classification in table 2902.1 the same thing as the buildings occupancy classification?

  • What about the description? Does that relate to anything else?

• If the number we are calculating is the total plumbing fixtures required for the entire project how do you determine where in the building they have to go?

• Is the total plumbing fixtures required the number required for each gender or for both genders combined?