• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects
    Architects
    General Contractors
    General Contractors
    Building Official & Plans Examiners
    Building Official & Plans Examiners
    Inspectors
    Inspectors
    Owners
    Owners
    Subcontractors
    Subcontractors
    Code Consultants
    Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

1005.3 Required Capacity Based on Occupant Load

Building Code 2018 of Illinois > 10 Means of Egress > 1005 Means of Egress Sizing > 1005.3 Required Capacity Based on Occupant Load
JUMP TO FULL CODE CHAPTER
The required capacity, in inches (mm), of the means of egress for any room, area, space or story shall be not less than that determined in accordance with Sections 1005.3.1 and 1005.3.2.

1005.3.1 Stairways

ILLUSTRATION
CALCULATE P
P Premium Feature

This feature is included in premium subscriptions only. Click below to start a free trial.

Try 2 Weeks Free
CALCULATE
Calculate code sheet portions referencing this topic.
The capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means of egress capacity factor of 0.3 inch (7.6 mm) per occupant. Where stairways serve more than one story, only the occupant load of each story considered individually shall be used in calculating the required capacity of the stairways serving that story.
Exceptions:
  1. For other than Group H and I-2 occupancies, the capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means of egress capacity factor of 0.2 inch (5.1 mm) per occupant in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 and an emergency voice/alarm communication system in accordance with Section 907.5.2.2.
  2. Facilities with smoke-protected assembly seating shall be permitted to use the capacity factors in Table 1029.6.2 indicated for stepped aisles for exit access or exit stairways where the entire path for means of egress from the seating to the exit discharge is provided with a smoke control system complying with Section 909.
  3. Facilities with open-air assembly seating shall be permitted to the capacity factors in Section 1029.6.3 indicated for stepped aisles for exit access or exit stairways where the entire path for means of egress from the seating to the exit discharge is open to the outdoors.

1005.3.2 Other Egress Components

ILLUSTRATION
CALCULATE P
P Premium Feature

This feature is included in premium subscriptions only. Click below to start a free trial.

Try 2 Weeks Free
CALCULATE
Calculate code sheet portions referencing this topic.
The capacity, in inches, of means of egress components other than stairways shall be calculated by multiplying the occupant load served by such component by a means of egress capacity factor of 0.2 inch (5.1 mm) per occupant.

Exceptions:
  1. For other than Group H and I-2 occupancies, the capacity, in inches, of means of egress components other than stairways shall be calculated by multiplying the occupant load served by such component by a means of egress capacity factor of 0.15 inch (3.8 mm) per occupant in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 and an emergency voice/alarm communication system in accordance with Section 907.5.2.2.
  2. Facilities with smoke-protected assembly seating shall be permitted to use the capacity factors in Table 1029.6.2 indicated for level or ramped aisles for means of egress components other than stairways where the entire path for means of egress from the seating to the exit discharge is provided with a smoke control system complying with Section 909.
  3. Facilities with open-air assembly seating shall be permitted to the capacity factors in Section 1029.6.3 indicated for level or ramped aisles for means of egress components other than stairways where the entire path for means of egress from the seating to the exit discharge is open to the outdoors.

Related Code Sections


1005.3 Means of Egress, Required Capacity Based on Occupant Load
capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means ...
Building Code 2021 of Illinois > 10 Means of Egress > 1005 Means of Egress Sizing > 1005.3 Required Capacity Based on Occupant Load
1005.3 Means of Egress, Required Capacity Based on Occupant Load
capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means ...
Building Code 2018 of Illinois > 10 Means of Egress > 1005 Means of Egress Sizing > 1005.3 Required Capacity Based on Occupant Load
1004.2 Means of Egress, Cumulative Occupant Loads
spaces. Design of egress path capacity shall be based on the cumulative portion of occupant loads of all rooms, areas or spaces to that point along ...
Building Code 2021 of Illinois > 10 Means of Egress > 1004 Occupant Load > 1004.2 Cumulative Occupant Loads
1004.2 Means of Egress, Cumulative Occupant Loads
spaces. Design of egress path capacity shall be based on the cumulative portion of occupant loads of all rooms, areas or spaces to that point along ...
Building Code 2018 of Illinois > 10 Means of Egress > 1004 Occupant Load > 1004.2 Cumulative Occupant Loads
1006.1 Change of Occupancy, Live Loads
Structural elements carrying tributrary live loads from an area with a change of occupancy shall satisfy the requirements of Section 1607 ...
Existing Building Code 2018 of Illinois > 10 Change of Occupancy > 1006 Structural > 1006.1 Live Loads
Help Contact Us Privacy Terms
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
Code Compare
Code Compare
Highlight differences between any two building codes.
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL PRICING