ADOPTS WITH AMENDMENTS:

International Existing Building Code 2018 (IEBC 2018)

Heads up: There are no amended sections in this chapter.

14R-13-1301 The provisions of Section 1301 of IEBC are adopted by reference with the following modifications:

Added Coun. J. 4-10-19, p. 100029.

Amended Coun. J. 2-19-20, p. 14474.

Amended Coun. J. 10-7-20, p. 21791.

The provisions of this chapter shall apply to alterations, additions and changes of occupancy to existing buildings, including historic buildings. The provisions of this chapter are intended to maintain or increase the current degree of public safety, health and general welfare in existing buildings while allowing alterations, additions and changes of occupancy without requiring full compliance with Chapters 6 through 12, except where compliance with other provisions of this code is specifically required in this chapter.
Alterations, additions and changes of occupancy to existing structures shall comply with the provisions of this chapter or with one of the methods provided in Section 301.3.
Nothing in this chapter shall be interpreted to waive any requirement in the Chicago Minimum Requirements for Existing Buildings.
Existing buildings in which there is work involving additions, alterations or changes of occupancy shall be made to conform to the requirements of this chapter or the provisions of Chapters 6 through 12. The provisions of Sections 1301.2.1 through 1301.2.5 shall apply to existing occupancies that will continue to be, or are proposed to be, in Groups A, B, E, F, M, R and S. These provisions shall not apply to buildings with occupancies in Group H or I.
Where an existing building is changed to a new occupancy classification and this section is applicable, the provisions of this section for the new occupancy shall be used to determine compliance with this code.

Where a portion of the building is changed to a new occupancy classification and that portion is separated from the remainder of the building with fire barriers or horizontal assemblies having a fire-resistance rating as required by Table 508.4 of the Chicago Building Code for the separate occupancies, or with approved compliance alternatives, the portion changed shall be made to conform to the provisions of this section.

Where a portion of the building is changed to a new occupancy classification and that portion is not separated from the remainder of the building with fire barriers or horizontal assemblies having a fire-resistance rating as required by Table 508.4 of the Chicago Building Code for the separate occupancies, or with approved compliance alternatives, the provisions of this section which apply to each occupancy shall apply to the entire building. Where there are conflicting provisions, those requirements which secure the greater public safety shall apply to the entire building or structure.

Additions to existing buildings shall comply with the requirements of the Chicago Building Code for new construction. The combined height and area of the existing building and the new addition shall not exceed the height and area allowed by Chapter 5 of the Chicago Building Code. Where a fire wall that complies with Section 706 of the Chicago Building Code is provided between the addition and the existing building, the addition shall be considered a separate building.

An existing building or portion thereof shall not be altered in such a manner that results in the building being less safe or sanitary than such building is currently.

Exception: Where the current level of safety or sanitation is proposed to be reduced, the portion altered shall conform to the requirements of the Chicago Building Code.

Where escalators are provided in below-grade transportation stations, existing and new escalators shall be allowed to have a clear width of less than 32 inches (815 mm).
For repairs, alterations, additions, and changes of occupancy to existing buildings that are evaluated in accordance with this section, compliance with this section shall be accepted by the building official.
Where the building official determines that an unsafe condition exists, the condition shall be abated as part of the proposed work.
Buildings that are evaluated in accordance with this section shall comply with the Chicago Fire Prevention Code and Chicago Minimum Requirements for Existing Buildings.
For proposed work covered by this chapter, the building owner shall cause the existing building to be investigated and evaluated by a registered design professional in accordance with the provisions of Sections 1301.4 through 1301.9.
The owner shall have a structural analysis of the existing building made to determine adequacy of structural systems for the proposed alteration, addition or change of occupancy. The analysis shall demonstrate that the building with the work completed is capable of resisting the loads specified in Chapter 16 of the Chicago Building Code.
A report containing the results of the investigation and evaluation as required in Section 1301.4, and proposed compliance alternatives shall be submitted to the building official.
The building official shall determine whether the existing building, with the proposed addition, alteration, or change of occupancy, complies with the provisions of this section in accordance with the evaluation process in Sections 1301.5 through 1301.9.
The building official is authorized to establish procedures for the submission, review and acceptance of reports required under Section 1301.4.2 The building official may refer such reports to the Committee on Standards and Tests for review in accordance with Section 1004 of the Chicago Construction Codes Administrative Provisions. A permit application based on compliance with this chapter shall not be reviewed until the report has been accepted by the building official.
The evaluation shall be composed of three categories: fire safety, means of egress, and general safety, as defined in Sections 1301.5.1 through 1301.5.3.
Included within the fire safety category are the structural fire resistance, automatic fire detection, fire alarm, automatic sprinkler system and fire suppression system features of the facility.
Included within the means of egress category are the configuration, characteristics, and support features for means of egress in the facility.
Included within the general safety category are the fire safety parameters and the means of egress parameters.

The evaluation process specified herein shall be followed in its entirety to evaluate existing buildings in Groups A, B, E, F, M, R, S and U. Table 1301.7 shall be utilized for tabulating the results of the evaluation. References to other sections of this code or other codes indicate that compliance with those sections is required in order to gain credit in the evaluation.

In applying this section to a building with mixed occupancies, where the separation between the mixed occupancies does not qualify for any category indicated in Section 1301.6.16, the score for each occupancy shall be determined, and the lowest score determined for each section of the evaluation process shall apply to the entire building, Where the separation between the mixed occupancies qualifies for any category indicated in Section 1301.6.16, the score for each occupancy shall apply to each portion of the building based on the occupancy of the space.

The value for building height and number of stories shall be the lesser value determined by the formula in Section 1301.6.1.1. Section 504 of the Chicago Building Code shall be used to determine the allowable height and number of stories of the building. Subtract the actual building height from the allowable height and divide by 121/2 feet (3810 mm). Enter the height value and its sign (positive or negative) in Table 1301.7 under Safety Parameter 1301.6.1, Building Height, for fire safety, means of egress, and general safety. The maximum score for a building shall be 10. The maximum score shall be used where the allowable height and number of stories is unlimited.

The following formulas shall be used in computing the building height value.


(Equation 13-1)

(Equation 13-2)

where:

AH = Allowable height in feet (mm) from Section 504 of the Chicago Building Code.

EBH = Existing building height in feet (mm).

AS = Allowable height in stories from Section 504 of the Chicago Building Code.

EBS = Existing building height in stories.

CF = 1 if (AH) — (EBH) is positive.

CF = Construction-type factor shown in Table 1301.6.6(2) if (AH) — (EBH) is negative.

Note: Where mixed occupancies are separated and individually evaluated as indicated in Section 1301.6, the values AH, AS, EBH and EBS shall be based on the height of the occupancy being evaluated.

The value for building area shall be determined by the formula in Section 1301.6.2.2. Section 506 of the Chicago Building Code and the formula in Section 1301.6.2.1 shall be used to determine the allowable area of the building. Subtract the actual building area from the allowable area and divide by 1,200 square feet (112 m2). In determining the area value, the maximum allowed positive value for area is 50 percent of the fire safety score as listed in Table 1301.8, Mandatory Safety Scores. The maximum score shall be used where the allowable area is unlimited.

The following formula shall be used in computing allowable area:


(Equation 13-3)

where:

Aa = Allowable building area per story (square feet).

At = Tabular allowable area factor (NS, S1, S13R, or SM value, as applicable) in accordance with Table 506.2 of the Chicago Building Code.

NS = Tabular allowable area factor in accordance with Table 506.2 of the Chicago Building Code for a nonsprinklered building (regardless of whether the building is sprinklered).

If = Area factor increase due to frontage as calculated in accordance with Section 506.3 of the Chicago Building Code.

The following formula shall be used in computing the area value. Determine the area value for each occupancy floor area on a floor-by-floor basis. For each occupancy, choose the minimum area value of the set of values obtained for the particular occupancy.


(Equation 13-4)

where:

i = Value for an individual separated occupancy on a floor.

n = Number of separated occupancies on a floor.

Evaluate the compartments created by fire barriers or horizontal assemblies which comply with Sections 1301.6.3.1 and 1301.6.3.2 and which are exclusive of the wall elements considered under Sections 1301.6.4 and 1301.6.5. Conforming compartments shall be figured as the net area and do not include shafts, chases, stairways, walls, or columns. Using Table 1301.6.3, determine the appropriate compartmentation value (CV) and enter that value into Table 1301.7 under Safety Parameter 1301.6.3, Compartmentation, for fire safety, means of egress, and general safety.

TABLE 1301.6.3

COMPARTMENTATION VALUES

OCCUPANCY CATEGORIES
a
Compartment size equal
to or greater than 15,000
square feet
b
Compartment size of
10,000 square feet
c
Compartment size of
7,500 square feet
d
Compartment size
of 5,000 square feet
e
Compartment size
of 2,500 square feet
or less
A-1, A-3 0 6 10 14 18
A-2 0 4 10 14 18
A-4, B, E, S-2 0 5 10 15 20
F, M, R, S-1 0 4 10 16 22

For SI: 1 square foot = 0.0929 m2.

A wall used to create separate compartments shall be a fire barrier conforming to Section 707 of the Chicago Building Code with a fire-resistance rating of not less than 2 hours. Where the building is not divided into more than one compartment, the compartment size shall be taken as the total floor area on all floors. Where there is more than one compartment within a story, each compartmented area on such story shall be provided with a horizontal exit conforming to Section 1026 of the Chicago Building Code. The fire door serving as the horizontal exit between compartments shall be so installed, fitted, and gasketed that such fire door will provide a substantial barrier to the passage of smoke.
A floor/ceiling assembly used to create compartments shall conform to Section 711 of the Chicago Building Code and shall have a fire-resistance rating of not less than 2 hours.

Evaluate the fire-resistance rating of floors and walls separating tenants, including dwelling units, and not evaluated under Sections 1301.6.3 and 1301.6.5.

Under the categories and occupancies in Table 1301.6.4, determine the appropriate value and enter that value in Table 1301.7 under Safety Parameter 1301.6.4, Tenant and Dwelling Unit Separation, for fire safety, means of egress, and general safety.

TABLE 1301.6.4

SEPARATION VALUES

OCCUPANCY CATEGORIES
a b c d e
A-1 0 0 0 0 1
A-2 -5 -3 0 1 3
R NP -2 0 2 4
A-3, A-4, B, E, F, M, S-1 -4 -3 0 2 4
S-2 -5 -2 0 2 4

The categories for tenant and dwelling unit separations are:

  1. Category a—No fire partitions; incomplete fire partitions; no doors; doors not self-closing or automatic-closing.
  2. Category b—Fire partitions or floor assemblies with less than 1-hour fire-resistance ratings or not constructed in accordance with Section 708 or 711 of the Chicago Building Code, respectively.
  3. Category c—Fire partitions with 1-hour or greater fire-resistance ratings constructed in accordance with Section 708 of the Chicago Building Code and floor assemblies with 1-hour but less than 2-hour fire-resistance ratings constructed in accordance with Section 711 of the Chicago Building Code or with only one tenant within the floor area.
  4. Category d—Fire barriers with 1-hour but less than 2-hour fire-resistance ratings constructed in accordance with Section 707 of the Chicago Building Code and floor assemblies with 2-hour or greater fire-resistance ratings constructed in accordance with Section 711 of the Chicago Building Code.
  5. Category e—Fire barriers and floor assemblies with 2-hour or greater fire-resistance ratings and constructed in accordance with Sections 707 and 711 of the Chicago Building Code, respectively.

Evaluate the fire-resistance rating and degree of completeness of walls which create corridors serving the floor and that are constructed in accordance with Section 1020 of the Chicago Building Code. This evaluation shall not include the wall elements considered under Sections 1301.6.3 and 1301.6.4. Under the categories and groups in Table 1301.6.5, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.5, Corridor Walls, for fire safety, means of egress, and general safety.

TABLE 1301.6.5

CORRIDOR WALL VALUES

OCCUPANCY CATEGORIES
a b ca da
A-1 -10 -4 0 2
A-2 -30 -12 0 2
A-3, F, M, R, S-1 -7 -3 0 2
A-4, B, E, S-2 -5 -2 0 5
  1. Corridors not providing at least one-half the exit access travel distance for all occupants on a floor shall use Category b.

The categories for corridor walls are:

  1. Category a—No fire partitions; incomplete fire partitions; no doors; or doors not self-closing.
  2. Category b—Less than 1-hour fire-resistance rating or not constructed in accordance with Section 708.4 of the Chicago Building Code.
  3. Category c—1-hour to less than 2-hour fire-resistance rating, with doors conforming to Section 716 of the Chicago Building Code or without corridors as allowed by Section 1020 of the Chicago Building Code.
  4. Category d—2-hour or greater fire-resistance rating, with doors conforming to Section 716 of the Chicago Building Code.

Evaluate the fire-resistance rating of interior exit stairways or ramps, hoistways, escalator openings, and other shaft enclosures within the building, and openings between two or more floors. Table 1301.6.6(1) contains the appropriate protection values. Multiply that value by the construction-type factor found in Table 1301.6.6(2). Enter the vertical opening value and its sign (positive or negative) in Table 1301.7 under Safety Parameter 1301.6.6, Vertical Openings, for fire safety, means of egress, and general safety. If the structure is a one-story building or if all the unenclosed vertical openings within the building conform to the requirements of Section 712 of the Chicago Building Code, enter a value of 2. The maximum positive value for this requirement (VO) shall be 2.

TABLE 1301.6.6(1)

VERTICAL OPENING PROTECTION VALUE

PROTECTION VALUE
None (unprotected opening) -2 times number of floors connected
Less than 1 hour -1 times number of floors connected
1 to less than 2 hours 1
2 hours or more 2

TABLE 1301.6.6(2)

CONSTRUCTION-TYPE FACTOR

FACTOR TYPE OF CONSTRUCTION
IA IB IIA IIB IIIA IIIB IV VA VB
1.2 1.5 2.2 3.5 2.5 3.5 2.3 3.3 7

The following formula shall be used in computing vertical opening value.


(Equation 13-5)

where:

VO = Vertical opening value. The calculated value shall not be greater than positive 2.0.

PV = Protection value from Table 1301.6.6.(1).

CF = Construction-type factor from Table 1301.6.6.(2).

Evaluate the ability of the HVAC system to resist the movement of smoke and fire beyond the point of origin. Under the categories in Section 1301.6.7.1, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.7, HVAC Systems, for fire safety, means of egress, and general safety.

The categories for HVAC systems are:

  1. Category a—Plenums not in accordance with Section 602 of the Chicago Mechanical Code. -10 points.
  2. Category b—Air movement in egress elements not in accordance with Section 1020.5 of the Chicago Building Code. -5 points.
  3. Category c—Both Categories a and b are applicable. -15 points.
  4. Category d—Compliance of the HVAC system with Section 1020.5 of the Chicago Building Code and Section 602 of the Chicago Mechanical Code. 0 points.
  5. Category e—Systems serving one story; or a central boiler/chiller system without ductwork connecting two or more stories. +5 points.

Evaluate the smoke detection capability based on the location and operation of automatic fire detectors in accordance with Section 907 of the Chicago Building Code and the Chicago Mechanical Code. Under the categories and occupancies in Table 1301.6.8, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.8, Automatic Fire Detection, for fire safety, means of egress, and general safety.

TABLE 1301.6.8

AUTOMATIC FIRE DETECTION VALUES

OCCUPANCY CATEGORIES
a b c d e f
A-1, A-3, F, M,
R, S-1
-10 -5 0 2 6 NA
A-2 -25 -5 0 5 9 NA
A-4, B, E, S-2 -4 -2 0 4 8 NA

NA = Not Applicable.

The categories for automatic fire detection are:

  1. Category a—None.
  2. Category b—Existing smoke detectors in HVAC systems and maintained in accordance with the Chicago Minimum Requirements for Existing Buildings.
  3. Category c—Smoke detectors in HVAC systems. The detectors are installed in accordance with the requirements for new buildings in the Chicago Mechanical Code.
  4. Category d—Smoke detectors throughout all floor areas other than individual sleeping units, tenant spaces and dwelling units.
  5. Category e—Smoke detectors installed throughout the floor area.
  6. Category f—Smoke detectors in corridors only.

Evaluate the capability of the fire alarm system in accordance with Section 907 of the Chicago Building Code. Under the categories and occupancies in Table 1301.6.9, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.9, Fire Alarm System, for fire safety, means of egress, and general safety.

TABLE 1301.6.9

FIRE ALARM SYSTEM VALUES

OCCUPANCY CATEGORIES
a ba c d
A-1, A-2, A-3, A-4, B, E, R -10 -5 0 5
F, M, S 0 5 10 15
  1. For buildings equipped throughout with an automatic sprinkler system, add 2 points for activation by a sprinkler water-flow device.

The categories for fire alarm systems are:

  1. Category a—None.
  2. Category b—Fire alarm system with manual fire alarm boxes in accordance with Section 907.4 of the Chicago Building Code and alarm notification appliances in accordance with Section 907.5.2 of the Chicago Building Code.
  3. Category c—Fire alarm system in accordance with Section 907 of the Chicago Building Code.
  4. Category d—Category c plus voice communications systems that conform to Section 907.2.12.2 of the Chicago Building Code and a fire command center that conforms to Section 911 of the Chicago Building Code and contains the emergency voice communications system controls, and any other controls specified in Section 911 of the Chicago Building Code where those systems are provided.

Evaluate the ability of a natural or mechanical venting, exhaust, or pressurization system to control the movement of smoke from a fire. Under the categories and occupancies in Table 1301.6.10, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.10, Smoke Control, for means of egress and general safety.

TABLE 1301.6.10

SMOKE CONTROL VALUES

OCCUPANCY CATEGORIES
a b c d e f
A-1, A-2, A-3 0 1 2 3 6 6
A-4, E 0 0 0 1 3 5
B, M, R 0 2a 3a 3a 3a 4a
F, S 0 2a 2a 3a 3a 3a
  1. This value shall be 0 if compliance with Category d or e in Section 1301.6.8.1 has not been obtained.

The categories for smoke control are:

  1. Category a—None.
  2. Category b—The building is equipped throughout with an automatic sprinkler system. Openings are provided in exterior walls at the rate of 20 square feet (1.86 m2) per 50 linear feet (15 240 mm) of exterior wall in each story and distributed around the building perimeter at intervals not exceeding 50 feet (15 240 mm). Such openings shall be readily openable from the inside without a key or separate tool and shall be provided with ready access thereto. In lieu of operable openings, clearly and permanently marked tempered glass panels shall be used.
  3. Category c—One enclosed exit stairway, with ready access thereto, from each occupied floor of the building. The stairway has operable exterior windows, and the building has openings in accordance with Category b.
  4. Category d—One smokeproof enclosure and the building has openings in accordance with Category b.
  5. Category e—The building is equipped throughout with an automatic sprinkler system. Each floor area is provided with a mechanical air-handling system designed to accomplish smoke containment. Return and exhaust air shall be moved directly to the outside without recirculation to other floor areas of the building under fire conditions. The system shall exhaust not less than six air changes per hour from the floor area. Supply air by mechanical means to the floor area is not required. Containment of smoke shall be considered as confining smoke to the floor area involved without migration to other floor areas.

  6. Category f—Each stairway shall be one of the following: a smokeproof enclosure in accordance with Section 1023.11 of the Chicago Building Code; pressurized in accordance with Appendix S of the Chicago Building Code; or shall have operable exterior windows.

Evaluate the means of egress capacity and the number of exits available to the building occupants. In applying this section, the means of egress are required to conform to the following sections of the Chicago Building Code: 1003.7, 1004, 1005, 1006, 1007, 1013, 1016.2, 1026.1, 1028.2, 1028.5, 1029.2, 1029.3 and 1029.4. The number of exits credited is the number that is available to each occupant of the area being evaluated. Existing fire escapes shall be accepted as a component in the means of egress when conforming to Section 504.

Under the categories and occupancies in Table 1301.6.11, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.11, Means of Egress Capacity, for means of egress and general safety.

TABLE 1301.6.11
MEANS OF EGRESS VALUES

OCCUPANCY CATEGORIES
aa b c d e
A-1, A-2, A-3, A-4, E -10 0 2 8 10
M -3 0 1 2 4
B, F, S -1 0 0 0 0
R -3 0 0 0 0
  1. The values indicated are for buildings six stories or less in height. For buildings over six stories above grade plane, add an additional -10 points.

The categories for means-ofegress capacity and number of exits are:

  1. Category a—Compliance with the minimum required means-of-egress capacity or number of exits is achieved through the use of a fire escape in accordance with Section 405.
  2. Category b—Capacity of the means of egress complies with Section 1005 of the Chicago Building Code, and the number of exits complies with the minimum number required by Section 1006 of the Chicago Building Code.
  3. Category c—Capacity of the means of egress is equal to or exceeds 125 percent of the required means-of-egress capacity, the means of egress complies with the minimum required width dimensions specified in the Chicago Building Code, and the number of exits complies with the minimum number required by Section 1006 of the Chicago Building Code.
  4. Category d—The number of exits provided exceeds the number of exits required by Section 1006 of the Chicago Building Code. Exits shall be located a distance apart from each other equal to not less than that specified in Section 1007 of the Chicago Building Code.
  5. Category e—The area being evaluated meets both Categories c and d.

In spaces required to be served by more than one means of egress, evaluate the length of the exit access travel path in which the building occupants are confined to a single path of travel. Under the categories and occupancies in Table 1301.6.12, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.12, Dead Ends, for means of egress and general safety.

TABLE 1301.6.12

DEAD-END VALUES

OCCUPANCY CATEGORIESa
a b c d
A-1, A-3, A-4, B, F,
M, R, S
-2 0 2 -4
A-2, E -2 0 2 -4
  1. For dead-end distances between categories, the dead-end value shall be obtained by linear interpolation.

The categories for dead ends are:

  1. Category a—Dead end corridors of a length allowed by Section 805.6.
  2. Category b—Dead end of 20 feet (6096 mm); or 50 feet (15 240 mm) in Group B in accordance with Section 1020.4, Exception 2, of the Chicago Building Code.
  3. Category c—No dead ends; or ratio of length to width (l/w) is less than 2.5:1.
  4. Category d—Dead ends exceeding Category a.

Evaluate the length of exit access travel to an exit complying with Section 1022 of the Chicago Building Code. Determine the appropriate points in accordance with the following equation and enter that value into Table 1301.7 under Safety Parameter 1301.6.13, Maximum Exit Access Travel Distance for means of egress and general safety. The maximum allowable exit access travel distance shall be determined in accordance with Section 1017.1 of the Chicago Building Code.


(Equation 13-6)

Evaluate the passenger elevator equipment and controls that are available to the fire department to reach all occupied floors. Emergency recall and in-car operation of elevators shall be provided in accordance with Chapter 4 of the Chicago Conveyance Device Code. Under the categories and occupancies in Table 1301.6.14, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.14, Elevator Control, for fire safety, means of egress and general safety. The values shall be zero for a single-story building.

TABLE 1301.6.14

ELEVATOR CONTROL VALUES

ELEVATOR TRAVEL CATEGORIES
a b c d
Less than 25 feet of travel above or
below the primary level of elevator
access for emergency fire-fighting or
rescue personnel
-2 0 0 +2
Travel of 25 feet or more above or
below the primary level of elevator
access for emergency fire-fighting or
rescue personnel
-4 NP 0 +4

For SI: 1 foot = 304.8 mm.

NP = Not Permitted.

The categories for elevator controls are:

  1. Category a—No elevator.
  2. Category b—Any elevator without Phase I emergency recall operation and Phase II emergency in-car operation.
  3. Category c—All elevators with Phase I emergency recall operation and Phase II emergency in-car operation as required by the Chicago Conveyance Device Code.
  4. Category d—All meet Category c; or Category b where allowed to be without Phase I emergency recall operation and Phase II emergency in-car operation; and at least one elevator that complies with new construction requirements serves all occupied floors.

Evaluate the presence of and reliability of means of egress emergency lighting. Under the categories and occupancies in Table 1301.6.15, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.15, Means of Egress Emergency Lighting, for means of egress and general safety.

TABLE 1301.6.15

MEANS OF EGRESS EMERGENCY LIGHTING VALUES

NUMBER OF EXITS REQUIRED
BY SECTION 1006 OF THE
CHICAGO BUILDING CODE
CATEGORIES
a b c
Two or more exits NP 0 4
Minimum of one exit 0 1 1

NP = Not Permitted.

The categories for means of egress emergency lighting are:

  1. Category a—Means-of-egress lighting and exit signs not provided with emergency power in accordance with Section 2702 of the Chicago Building Code.
  2. Category b—Means of egress lighting and exit signs provided with emergency power in accordance with Section 2702 of the Chicago Building Code.
  3. Category c—Emergency power provided to means of egress lighting and exit signs, which provides protection in the event of power failure to the site or building.

Where a building has two or more occupancies that are not in the same occupancy classification, the separation between the mixed occupancies shall be evaluated in accordance with this section. Where there is no separation between the mixed occupancies or the separation between mixed occupancies does not qualify for any of the categories indicated in Section 1301.6.16.1, the building shall be evaluated as indicated in Section 1301.6, and the value for mixed occupancies shall be zero. Under the categories and occupancies in Table 1301.6.16, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.16, Mixed Occupancies, for fire safety and general safety. For buildings without mixed occupancies, the value shall be zero.

TABLE 1301.6.16

MIXED OCCUPANCY VALUESa

OCCUPANCY CATEGORIES
a b c
A-1, A-2, R -10 0 10
A-3, A-4, B, E, F, M, S -5 0 5
  1. For fire-resistance ratings between categories, the value shall be obtained by linear interpolation.

The categories for mixed occupancies are:

  1. Category a—Occupancies separated by minimum 1-hour fire barriers or minimum 1-hour horizontal assemblies, or both.
  2. Category b—Separations between occupancies in accordance with Section 508.4 of the Chicago Building Code.
  3. Category c—Separations between occupancies having a fire-resistance rating at least one hour greater than required by Section 508.4 of the Chicago Building Code.

Evaluate the ability to suppress a fire based on the installation of an automatic sprinkler system in accordance with Section 903.3.1.1 of the Chicago Building Code. "Required sprinklers" shall be based on the requirements of this code. Under the categories and occupancies in Table 1301.6.17, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.17, Automatic Sprinklers, for fire safety, means of egress divided by 2, and general safety. High-rise buildings that undergo a change of occupancy shall be equipped throughout with an automatic sprinkler system in accordance with Section 403 of the Chicago Building Code and Chapter 9 of the Chicago Building Code.

TABLE 1301.6.17

SPRINKLER SYSTEM VALUES

OCCUPANCY CATEGORIES
aa ba c d e f
A-1, A-3, F, M, R, S-1 -6 -3 0 2 4 6
A-2 -4 -2 0 1 2 4
A-4, B, E, S-2 -12 -6 0 3 6 12
  1. These options cannot be taken if Category a in Section 1301.6.18 is used.

The categories for automatic sprinkler system protection are:

  1. Category a—Sprinklers are required throughout; sprinkler protection is not provided or the sprinkler system design is not adequate for the hazard protected in accordance with Section 903 of the Chicago Building Code.
  2. Category b—Sprinklers are required in a portion of the building; sprinkler protection is not provided or the sprinkler system design is not adequate for the hazard protected in accordance with Section 903 of the Chicago Building Code.
  3. Category c—Sprinklers are not required; none are provided.
  4. Category d—Sprinklers are required in a portion of the building; sprinklers are provided in such portion; the system is one that complied with the code at the time of installation and is maintained and supervised in accordance with Section 903 of the Chicago Building Code.
  5. Category e—Sprinklers are required throughout; sprinklers are provided throughout in accordance with Chapter 9 of the Chicago Building Code.
  6. Category f—Sprinklers are not required throughout; sprinklers are provided throughout in accordance with Chapter 9 of the Chicago Building Code.

Evaluate the ability to initiate attack on a fire by making a supply of water readily available through the installation of standpipes in accordance with Section 905 of the Chicago Building Code. "Required Standpipes" shall be based on the requirements of the Chicago Building Code. Under the categories and occupancies in Table 1301.6.18, determine the appropriate value and enter that value into Table 1301.7 under Safety Parameter 1301.6.18, Standpipes, for fire safety, means of egress, and general safety.

TABLE 1301.6.18

STANDPIPE SYSTEM VALUES

OCCUPANCY CATEGORIES
aa b c d
A-1, A-3, F, M, R, S-1 -6 0 4 6
A-2 -4 0 2 4
A-4, B, E, S-2 -12 0 6 12
  1. This option cannot be taken if Category a or Category b in Section 1301.6.17 is used.

The categories for standpipe systems are:

  1. Category a—Standpipes are required; standpipe is not provided or the standpipe system design is not in compliance with Section 905.3 of the Chicago Building Code.
  2. Category b—Standpipes are not required; none are provided.
  3. Category c—Standpipes are required; standpipes are provided in accordance with Section 905 of the Chicago Building Code.
  4. Category d—Standpipes are not required; standpipes are provided in accordance with Section 905 of the Chicago Building Code.

Evaluate the protection of incidental uses in accordance with Section 509.4.2 of the Chicago Building Code. Do not include those where this code requires automatic sprinkler systems throughout the building including high-rise buildings. Assign the lowest score from Table 1301.6.19 for the building or floor area being evaluated and enter that value into Table 1301.7 under Safety Parameter 1301.6.19, Incidental Uses, for fire safety, means of egress and general safety. If there are no specific occupancy areas in the building or floor area being evaluated, the value shall be zero.

TABLE 1301.6.19

INCIDENTAL USE AREA VALUES

PROTECTION REQUIRED BY TABLE 509 PROTECTION PROVIDED
None 1 hour AS AS with CRS 1 hour and AS 2 hours 2 hours and AS
2 hours and AS -4 -3 -2 -2 -1 -2 0
2 hours, or 1 hour and AS -3 -2 -1 -1 0 0 0
1 hour and AS -3 -2 -1 -1 0 -1 0
1 hour -1 0 -1 -1 0 0 0
1 hour, or AS with CRS -1 0 -1 -1 0 0 0
AS with CRS -1 -1 -1 -1 0 -1 0
1 hour or AS -1 0 0 0 0 0 0

AS = Automatic Sprinkler System;

CRS = Construction capable of resisting the passage of smoke (see Section 509.4.2 of the Chicago Building Code).

Note: For Table 1301.7, see page 71.

After determining the appropriate data from Section 1301.6, enter those data in Table 1301.7 and total the building score.

TABLE 1301.7
SUMMARY SHEET—BUILDING CODE

Existing occupancy: Proposed occupancy:
Year building was constructed: Number of stories above grade plane:
Type of construction: Height in feet:
Percentage of open perimeter increase: % Largest floor area per story:
Compartmentation (Y/N): Required door closers (Y/N):
Corridor wall fire-resistance: Vertical opening enclosure fire-resistance:
Type of HVAC system: Number of floors served:
Automatic fire detection (Y/N): Type and location:
Fire alarm system (Y/N): Type:
Smoke control (Y/N): Type:
Adequate exit routes (Y/N): Dead ends (Y/N):
Maximum exit access travel distance: Elevator recall (Y/N):
Means of egress emergency lighting (Y/N): Type:
Mixed occupancies (Y/N): Incidental use (Y/N):
Mixed occupancies (Y/N): Type:
Standpipes (Y/N): Type and location:
SAFETY PARAMETERS FIRE SAFETY (FS) MEANS OF EGRESS (ME) GENERAL SAFETY (GS)
1301.6.1 Building height      
1301.6.2 Building area      
1301.6.3 Compartmentation      
1301.6.4 Tenant and dwelling unit separations      
1301.6.5 Corridor walls      
1301.6.6 Vertical openings      
1301.6.7 HVAC systems      
1301.6.8 Automatic fire detection      
1301.6.9 Fire alarm system      
1301.6.10 Smoke control      
1301.6.11 Means of egress      
1301.6.12 Dead ends      
1301.6.13 Maximum exit access travel distance      
1301.6.14 Elevator control      
1301.6.15 Means of egress emergency lighting      
1301.6.16 Mixed occupancies      
1301.6.17 Automatic sprinklers   ÷ 2 =  
1301.6.18 Standpipes      
1301.6.19 Incidental use      
Building score—total value      

The values in Table 1301.8 are the required mandatory safety scores for the evaluation process listed in Section 1301.6.

TABLE 1301.8

MANDATORY SAFETY SCORESa

OCCUPANCY FIRE SAFETY
(MFS)
MEANS OF
EGRESS (MME)
GENERAL
SAFETY (MGS)
A-1 20 31 31
A-2 21 32 32
A-3 22 33 33
A-4, E 29 40 40
B 30 40 40
F 24 34 34
I-2 19 34 34
M 23 40 40
R 21 38 38
S-1 19 29 29
S-2 29 39 39

a. MFS = Mandatory Fire Safety.

MME = Mandatory Means of Egress.

MGS = Mandatory General Safety.

The mandatory safety score in Table 1301.8 shall be subtracted from the building score in Table 1301.7 for each category in accordance with the evaluation formulas in Table 1301.9. Where the final score for any category equals zero or more, the building is in compliance with the requirements of this section for that category. Where the final score for any category is less than zero, the building is not in compliance with the requirements of this section.

For mixed occupancies, the following provisions shall apply:

  1. Where the separation between mixed occupancies does not qualify for any category indicated in Section 1301.6.16, the mandatory safety scores for the occupancy with the lowest general safety score in Table 1301.8 shall be utilized (see Section 1301.6).
  2. Where the separation between mixed occupancies qualifies for any category indicated in Section 1301.6.16, the mandatory safety scores for each occupancy shall be placed against the evaluation scores for the appropriate occupancy.
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