IBC 2021: Building Code Sections on Egress, Occupancy, and Fire Safety

IBC 2021 Section 302 (Classification of Occupancies)

Use this section to determine the occupancy group (A, B, E, F, H, I, M, R, S, U) and its subdivisions

General Means of Egress:

IBC 2021 Section 1003

Covers the fundamental principles of egress design

Occupant Load Calculation:

IBC 2021 Section 1004

Use this section to calculate occupant load based on occupancy type and floor area

Egress Width:

IBC 2021 Section 1005

Provides the formula for calculating required egress width

Doors in Means of Egress:

IBC 2021 Section 1010

Covers door swing, hardware, and clearances

Stairs in Means of Egress:

IBC 2021 Section 1011

Includes stair geometry, handrails, and tread/riser dimensions

Handrails:

IBC 2021 Section 1012

Covers height, graspability, and continuity

Corridors:

IBC 2021 Section 1013

Includes minimum width, dead-end limits, and finishes

Exit Signs and Illumination:

IBC 2021 Section 1014

Covers exit signage, illumination, and egress path marking

Accessible Means of Egress:

IBC 2021 Section 1007

Includes ramps, elevators, and accessible routes

Wall and Ceiling Finishes:

IBC 2021 Section 803

Covers flame spread and smoke-developed index for interior finishes

Floor Finishes:

IBC 2021 Section 804

Includes flame spread and critical radiant flux for flooring materials

Decorative Materials:

IBC 2021 Section 805

Covers flame spread and smoke-developed index for decorative materials

Fire Resistance Ratings:

IBC 2021 Section 703

Provides the required fire resistance ratings for walls, floors, and ceilings

Fire Barriers:

IBC 2021 Section 706

Covers continuity, openings, and fire resistance ratings

Fire Partitions:

IBC 2021 Section 707

Includes requirements for fire partitions and their openings

Smoke Barriers:

IBC 2021 Section 708

Covers continuity and openings in smoke barriers

Opening Protectives (Doors, Windows):

IBC 2021 Section 710

Includes fire protection ratings for doors and windows

Fire Stops and Penetrations:

IBC 2021 Section 711

Covers fire stopping for penetrations through fire-resistance-rated assemblies

General Accessibility Requirements:

IBC 2021 Section 1101

Provides an overview of accessibility requirements

Accessible Routes:

IBC 2021 Section 1103

Includes width, slope, and clearances for accessible routes

Accessible Toilet Rooms:

IBC 2021 Section 1107

Covers grab bars, clearances, and fixture requirements

Accessible Parking:

IBC 2021 Section 1108

Includes the number of accessible spaces and their dimensions

Accessible Signage:

IBC 2021 Section 1109

Covers raised characters, Braille, and mounting height

Accessible Seating:

IBC 2021 Section 1110

Includes wheelchair spaces and companion seating

Lighting Requirements:

IBC 2021 Section 1202

Covers natural and artificial lighting requirements

Ventilation Requirements:

IBC 2021 Section 1203

Includes mechanical and natural ventilation requirements

Indoor Air Quality:

IBC 2021 Section 1206

Covers ventilation rates and contaminant control

High-Rise Buildings:

IBC 2021 Section 1020

Includes smoke control and egress requirements for high-rise buildings

Atriums:

IBC 2021 Section 1019

Covers smoke control and egress for atriums

Mezzanines:

IBC 2021 Section 1018

Includes egress and height limitations for mezzanines

Referenced Standards:

IBC 2021 Section 302

1

Lists standards like NFPA 101 and ANSI A117

1

Occupancy Classification Table:

IBC 2021 Table 302

1

Lists occupancy groups (A, B, E, F, H, I, M, R, S, U) and their descriptions

Occupant Load Factors:

IBC 2021 Table 1004

1

2

Provides occupant load factors (e

g

, 15 sq ft per person for assembly, 200 sq ft per person for business)

Egress Width Factors:

IBC 2021 Table 1005

3

1

Specifies egress width factors (e

g

, 0

3 inches per person for stairways, 0

2 inches per person for other egress components)

Stair Geometry Requirements:

IBC 2021 Table 1011

5

Includes riser height (4-7 inches) and tread depth (minimum 11 inches) for stairs

Handrail Height and Graspability:

IBC 2021 Figure 1012

3(1)

Specifies handrail height (34-38 inches) and graspable profile requirements

Corridor Width Requirements:

IBC 2021 Section 1013

3

Minimum corridor width (44 inches for most occupancies, 72 inches for assembly with 50+ occupants)

Dead-End Corridor Limits:

IBC 2021 Section 1013

4

Maximum dead-end corridor length (20 feet for unsprinklered buildings, 50 feet for sprinklered buildings)

Fire Resistance Rating Table:

IBC 2021 Table 703

3

Provides required fire resistance ratings for walls, floors, and ceilings based on occupancy and construction type

Fire Door Assembly Ratings:

IBC 2021 Table 716

5(1)

Specifies fire door assembly ratings (e

g

, 20-minute, 45-minute, 90-minute) for various door types

Finish Material Classes:

IBC 2021 Table 803

1

Classifies interior wall and ceiling finishes (A, B, C) based on flame spread and smoke-developed index

Floor Finish Classes:

IBC 2021 Table 804

2

Classifies floor finishes (Class I, II, III) based on critical radiant flux

Accessible Route Clearances:

IBC 2021 Table 1103

2

1

Minimum clear width for accessible routes (36 inches continuously, 60 inches for wheelchair passing)

Accessible Toilet Room Requirements:

IBC 2021 Figure 1107

6

1

Specifies grab bar placement, clear floor space, and fixture dimensions for accessible toilet rooms

Accessible Parking Space Dimensions:

IBC 2021 Table 1108

2

1

Includes parking space dimensions (96 inches wide, 240 inches long) and van-accessible requirements

Accessible Signage Requirements:

IBC 2021 Table 1109

3

Specifies mounting height (48-60 inches to the baseline of the lowest character) and character size requirements

Glazing in Fire-Resistance-Rated Assemblies:

IBC 2021 Table 716

3(1)

Lists fire-resistance-rated glazing requirements (e

g

, 45-minute, 90-minute) for various glazing types

Smoke Protection in High-Rise Buildings:

IBC 2021 Section 403

3

Requirements for smoke control systems in high-rise buildings

Atrium Smoke Control:

IBC 2021 Section 404

5

Smoke control requirements for atriums based on size and occupancy

Mezzanine Egress Requirements:

IBC 2021 Section 505

2

Requirements for egress from mezzanines, including stair and door provisions

Interior Exit Stairway and Ramp Requirements:

IBC 2021 Section 1011

3

Requirements for interior exit stairways and ramps, including enclosure and fire resistance