ADOPTS WITH AMENDMENTS:

International Fire Code 2018 (IFC 2018)

Part I — Administrative

Part II — General Safety Provisions

Part III — Building and Equipment Design Features

ICC 300 Bleachers, Folding and Telescopic Seating, and Grandstands

Part IV — Special Occupancies and Operations

Part V — Hazardous Materials

Part VI — Referenced Standards

Part VII — Appendices

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

User note:

About this chapter: Chapter 11 applies to existing buildings constructed prior to the adoption of the code and is intended to ensure a minimum degree of fire and life safety to persons occupying existing buildings by providing for alterations to such buildings that do not comply with the minimum requirements of the International Building Code®. The provisions address general fire safety features such as requirements for fire alarm systems in some existing buildings and general means of egress, and include a section dedicated to existing Group I-2 occupancies.

1101.1 Scope

AMENDMENT
This section has been amended at the state or city level.
The provisions of IFC chapter 11, as amended, shall apply to existing buildings constructed prior to the adoption of this code.

1101.2 Intent

AMENDMENT
This section has been amended at the state or city level.
The intent of IFC chapter 11, as amended, is to provide a minimum degree of fire and life safety to persons occupying existing buildings by providing minimum construction requirements.

1101.3 Permits

AMENDMENT
This section has been amended at the state or city level.
Permits shall be required as set forth in Sections 105.6 and 105.7.

1101.4 Owner Notification

AMENDMENT
This section has been amended at the state or city level.
When a building is found to be in noncompliance with IFC chapter 11, as amended, the code official shall duly notify the owner of the building. Upon receipt of such notice, the owner shall, subject to the following time limits, take necessary actions to comply with the provisions of this chapter.

1101.4.1 Construction Documents

AMENDMENT
This section has been amended at the state or city level.
Construction documents necessary to comply with IFC chapter 11, as amended, shall be completed and submitted within a time schedule approved by the code official.

1101.4.2 Completion of Work

AMENDMENT
This section has been amended at the state or city level.
Work necessary to comply with IFC chapter 11, as amended, shall be completed within a time schedule approved by the code official.

1101.4.3 Extension of Time

AMENDMENT
This section has been amended at the state or city level.
The code official is authorized to grant necessary extensions of time when it can be shown that the specified time periods are not physically practical or pose an undue hardship. The granting of an extension of time for compliance shall be based on the showing of good cause and subject to the filing of an acceptable systematic plan of correction with the code official.

1101.5 Compliance Option

AMENDMENT
This section has been amended at the state or city level.
Existing buildings that meet the requirements of NFPA 101 (Life Safety Code) or chapter 1309, the Minnesota Residential Code, or chapter 1305, the Minnesota Building Code, when applicable, shall be deemed as evidence of compliance with IFC Chapter 11, as amended.

1101.6 Previous Codes

AMENDMENT
This section has been amended at the state or city level.
Protection features in existing buildings that comply with previous editions of the Fire Code or Building Code shall be considered as complying with IFC Chapter 11, as amended, unless the fire code official issues a written determination listing the conditions that constitute a distinct hazard to life.

The following terms are defined in Chapter 2:

DUTCH DOOR.

EXISTING.

1103.1 Required Construction

AMENDMENT
This section has been amended at the state or city level.
Existing buildings shall comply with the minimum provisions specified in Sections 1103.2 through 1106.1.2.
For interior finishes, interior trim, furniture, furnishings, decorative materials and decorative vegetation in existing buildings, see MSFC Sections 803 through 808.
Facilities designated as historic buildings shall develop a fire protection plan in accordance with NFPA 914. The fire protection plans shall comply with the maintenance and availability provisions in Sections 404.3 and 404.4.

1103.2 Emergency Responder Radio Coverage in Existing Buildings

AMENDMENT
This section has been amended at the state or city level.
Deleted.
See optional Appendix P for Emergency Responder Radio Coverage. Appendices must be adopted through local ordinance to be enforceable.

1103.3 Existing Elevators

AMENDMENT
This section has been amended at the state or city level.
Deleted.

1103.3.1 Elevators, Escalators and Moving Walks

AMENDMENT
This section has been amended at the state or city level.

1103.3.2 Elevator Emergency Operation

AMENDMENT
This section has been amended at the state or city level.

1103.4 Vertical Openings

AMENDMENT
This section has been amended at the state or city level.
ILLUSTRATION
Interior vertical shafts, including stairways, elevator hoistways, and service and utility shafts, that connect two or more stories of a building, shall be enclosed or protected as specified in Section 1103.4.1 and Table 1103.4.

TABLE 1103.4
VERTICAL OPENING PROTECTION REQUIRED
OCCUPANCY
CLASSIFICATION
CONDITIONS PROTECTION
REQUIRED
Group I Vertical openings connecting
two or more stories
1-hour protection
All, other than Group I Vertical openings connecting
two stories
No protection requireda, b
All, other than Group I Vertical openings connecting
three to five stories
1-hour protection or
automatic sprinklers
throughouta, b
All, other than Group I Vertical openings connecting
more than five stories
1-hour protectiona, b
All Mezzanines open to the floor
below
No protection requireda, b
All, other than Group I Atriums and covered mall
buildings
1-hour protection or
automatic sprinklers
throughout
All, other than Group B and M Escalator openings
connecting four or less stories
in a sprinklered building.
Openings must be protected
by a draft curtain and closely
spaced sprinklers in
accordance with NFPA 13.
No protection required
Group B and M Escalator openings in a
sprinklered building
protected by a draft curtain
and closely spaced sprinklers
in accordance with NFPA 13.
No protection required
  1. Vertical opening protection is not required for Group R-3 occupancies.
  2. Vertical opening protection is not required for open parking garages and ramps.

1103.4.1 Group I-2 and I-3 Occupancies

AMENDMENT
This section has been amended at the state or city level.

1103.4.1 Fire-Resistive-Rated Construction

AMENDMENT
This section has been amended at the state or city level.
Where onehour fire-resistive-rated construction is required by IFC Chapter 11, as amended, it includes equivalent ratings for openings in that construction. When openings are required to be protected, opening protectives shall be maintained self-closing or automatic-closing by smoke detection.

Existing fusible-link-type automatic door-closing devices are permitted if the fusible link rating does not exceed 135°F (57°C).

1103.4.2 Three to Five Stories

AMENDMENT
This section has been amended at the state or city level.

1103.4.3 More Than Five Stories

AMENDMENT
This section has been amended at the state or city level.

1103.4.4 Atriums and Covered Malls

AMENDMENT
This section has been amended at the state or city level.

1103.4.5 Escalators in Group B and M Occupancies

AMENDMENT
This section has been amended at the state or city level.

1103.4.6 Escalators Connecting Four or Fewer Stories

AMENDMENT
This section has been amended at the state or city level.

1103.4.7 Escalators Connecting More Than Four Stories

AMENDMENT
This section has been amended at the state or city level.

1103.4.8 Occupancies Other Than Groups I-2 and I-3

AMENDMENT
This section has been amended at the state or city level.

1103.4.9 Waste and Linen Chutes

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.1 Enclosure

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.2 Chute Intakes

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.2.1 Chute Intake Direct From Corridor

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.2.2 Chute Intake via a Chute-Intake Room

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.3 Automatic Sprinkler System

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.4 Chute Discharge Rooms

AMENDMENT
This section has been amended at the state or city level.

1103.4.9.5 Chute Discharge Protection

AMENDMENT
This section has been amended at the state or city level.

1103.4.10 Flue-Fed Incinerators

AMENDMENT
This section has been amended at the state or city level.

1103.5 Sprinkler Systems

AMENDMENT
This section has been amended at the state or city level.
An automatic sprinkler system shall be provided in existing buildings in accordance with Sections 1103.5.1 through 1103.5.5.

1103.5.1 Group A-2

AMENDMENT
This section has been amended at the state or city level.

1103.5.1 Reserved

AMENDMENT
This section has been amended at the state or city level.

1103.5.2 Group I-2

AMENDMENT
This section has been amended at the state or city level.
An automatic sprinkler system shall be provided throughout existing Group I-2 fire areas. The sprinkler system shall be provided throughout the floor where the Group I-2 occupancy is located, and in all floors between the Group I-2 occupancy and the level of exit discharge, including the level of exit discharge.

1103.5.3 Group I-2, Condition 2

AMENDMENT
This section has been amended at the state or city level.

1103.5.3 Basement Access or Sprinkler Protection

AMENDMENT
This section has been amended at the state or city level.
An approved automatic sprinkler system shall be provided in the following occupancies located in basements when such areas exceed 2,500 square feet (232.3 m2) in size and do not have 20 square feet (1.86 m2) of opening entirely above the adjoining ground level in each 50 lineal feet (15,240 mm) or fraction thereof of exterior wall on at least one side of the building:
  1. Group A occupancies used as commercial drinking and dining establishments.
  2. Group A occupancies used as bowling alleys.
  3. Group E occupancies used for student occupancy.
  4. Group I occupancies.
  5. Group R-1 and R-2 occupancies having dwelling units or guest rooms.
Openings required by this section shall have a minimum dimension of 30 inches (762 mm).

If any portion of the basement is located more than 75 feet (22.86 m) from required openings, the basement shall be provided with an approved automatic sprinkler system throughout.

1103.5.4 Pyroxylin Plastics

AMENDMENT
This section has been amended at the state or city level.
An automatic sprinkler system shall be provided throughout existing buildings where cellulose nitrate film or pyroxylin plastics are manufactured, stored, or handled in quantities exceeding 100 pounds (45 kg). Vaults located within buildings for the storage of raw pyroxylin shall be protected with an approved automatic sprinkler system capable of discharging 1.66 gallons per minute per square foot (68 L/mn/m2) over the area of the vault.

1103.5.5 Existing Rubbish and Linen Chutes

AMENDMENT
This section has been amended at the state or city level.
Existing rubbish and linen chutes that connect three or more stories shall be protected with automatic sprinklers installed and maintained in conformance with Section 903.2.11.2.
Existing structures shall be equipped with standpipes installed in accordance with Section 905 where required in Sections 1103.6.1 and 1103.6.2. The fire code official is authorized to approve the installation of manual standpipe systems to achieve compliance with this section where the responding fire department is capable of providing the required hose flow at the highest standpipe outlet.
Existing buildings with occupied floors located more than 50 feet (15 240 mm) above the lowest level of fire department access or more than 50 feet (15 240 mm) below the highest level of fire department access shall be equipped with standpipes.
Existing buildings with a rooftop helistop or heliport located more than 30 feet (9144 mm) above the lowest level of fire department access to the roof level on which the helistop or heliport is located shall be equipped with standpipes in accordance with Section 2007.5.

1103.7 Fire Alarm Systems

AMENDMENT
This section has been amended at the state or city level.
An approved fire alarm system shall be installed in existing buildings and structures in accordance with Sections 1103.7.1
through 1103.7.6.1.

In buildings containing mixed occupancies that are designed as separated uses (see Section 102.14), fire alarm and detection systems need only be installed in those occupancies where required by this section.

In areas protected by an approved, supervised automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2, automatic fire detectors required by Section 1103.7 need not be provided. Where Section 1103.7 requires smoke detectors, such protection shall be installed.

1103.7.1 Group E A, General

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system shall be installed in accordance with

Sections 1103.7.1 through 1103.7.1.3.1 in existing Group A occupancies having an occupant load of 300 or more.

1103.7.1.1 Exemptions for Group A

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system is not required in Group A occupancies having the following conditions:
  1. Assembly areas used solely for worship purposes.
  2. A fire alarm system is not required when an approved automatic fire-sprinkler system is installed throughout the building.
  3. Assembly uses located inside Group E occupancies shall have alarms as required for the Group E occupancy.
  4. A-5 occupancies.

1103.7.1.2 Initiation

AMENDMENT
This section has been amended at the state or city level.
Initiation of the fire alarm system shall be by automatic means. Approved automatic fire detectors shall be installed in laundry rooms, boiler and furnace rooms, mechanical and electrical rooms, shops, kitchens, trash-collection rooms, storage rooms, and similar areas.

1103.7.1.3 Notification

AMENDMENT
This section has been amended at the state or city level.
The required fire alarm system shall activate an audible and visible notification appliance at a constantly attended location within the building for the purposes of initiating emergency action. A presignal feature and positive alarm sequencing in accordance with NFPA 72 are permitted. Occupant notification shall be by means of voice announcements, either live or prerecorded, initiated by the person in the constantly attended location.

1103.7.1.3.1 Exemption for Voice Evacuation

AMENDMENT
This section has been amended at the state or city level.
Where no constantly attended location exists, an automatic fire alarm system providing a general evacuation signal or an approved emergency voice/alarm communications system is permitted.

1103.7.2 Group I-1 E, General

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system shall be installed in accordance with
Sections 1103.7.2 through 1103.7.2.4 in existing Group E occupancies having an occupant load of 50 or more.

1103.7.2.1 Exemption for Single Classroom

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system is not required for a building with a maximum area of 1,000 square feet (93 m2) that contains a single classroom and is located no closer than 20 feet (15,240 mm) from another building.

1103.7.2.2 Initiation

AMENDMENT
This section has been amended at the state or city level.
Initiation of the fire alarm system shall be by manual and automatic means. Approved automatic fire detectors shall be provided in laundry rooms, boiler and furnace rooms, mechanical and electrical rooms, shops, laboratories, kitchens, locker rooms, custodial closets, trash-collection rooms, storage rooms, lounges, and similar areas.

1103.7.2.2.1 Manual Activation

AMENDMENT
This section has been amended at the state or city level.
In buildings protected throughout by an approved, automatic fire sprinkler system or having an approved fire alarm system equipped with corridor smoke detection, manual fire alarm boxes are only required in the main office and in a custodial area.

1103.7.2.3 Travel Through Adjoining Rooms

AMENDMENT
This section has been amended at the state or city level.
Where the only means of egress travel from an interior room or rooms having an aggregate occupant load of more than ten occupants is through an adjoining or intervening room, automatic smoke detectors shall be installed throughout the common atmosphere through which the path of egress travel passes.

1103.7.2.3.1 Sprinkler Protection

AMENDMENT
This section has been amended at the state or city level.
In buildings that are protected throughout by an approved automatic sprinkler system installed in accordance with Section 903.3.1.1, smoke detectors are not required in intervening or adjoining rooms.

1103.7.2.4 Notification

AMENDMENT
This section has been amended at the state or city level.

1103.7.3 Group I-2 I, General

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system shall be installed in accordance with Sections 907.2.6 through 907.2.6.4.2 in existing Group I occupancies.
Existing Group I occupancy fire alarm requirements are the same as for new buildings. The occupants of these buildings are the most vulnerable.

1103.7.4 Group I-3 R-1, General

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system shall be installed in accordance with Sections 1103.7.4 through 1103.7.4.4.1 in existing Group R-1 occupancies where:
  1. Any sleeping unit or dwelling unit is located two or more stories above the story containing the lowest level of exit discharge.
  2. Any sleeping unit or dwelling unit is located more than one story below the highest level of exit discharge of exits serving the dwelling unit.
  3. The building contains 20 or more guest rooms or dwelling units.
  4. The building is used as a congregate living facility, dormitory, convent, monastery, fraternity, sorority, group home, or shelter and has an occupant load of 20 or more.

1103.7.4.1 Direct Exits to Exterior

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system is not required in buildings that do not have interior corridors serving guest rooms and where each guest room has an exit door opening directly to an exterior exit access that leads directly to the exits.

1103.7.4.2 Initiation

AMENDMENT
This section has been amended at the state or city level.
Initiation of the fire alarm system shall be by automatic means. Approved automatic fire detectors shall be provided in boiler and furnace rooms, shops, laundry rooms, mechanical and electrical rooms, trash-collection rooms, storage rooms, gift shops, locker rooms, and similar areas. Automatic smoke detectors shall be provided in all common areas and interior corridors serving as required means of egress.

1103.7.4.2.1 Sprinkler Protection

AMENDMENT
This section has been amended at the state or city level.
System fire and smoke detectors are not required when an approved automatic fire-extinguishing system is installed in accordance with Section 903.3.1.1 or 903.3.1.2 and a manual fire alarm box is provided at a constantly attended location. When a constantly attended location is not provided, the manual fire alarm box shall be provided at the main exit.

1103.7.4.3 Notification

AMENDMENT
This section has been amended at the state or city level.

1103.7.4.4 Guest Room Smoke Alarms

AMENDMENT
This section has been amended at the state or city level.
Guest room smoke alarms required by Section 1103.8 shall not be connected to a fire alarm system.

1103.7.4.4.1 Annunciation Allowed

AMENDMENT
This section has been amended at the state or city level.
Connection of such alarms for annunciation is permitted.

1103.7.5 Group R-1 R-2, General

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system shall be installed in accordance with Sections 1103.7.5 through 1103.7.5.3 in existing Group R-2 occupancies where:
  1. Any sleeping unit or dwelling unit is located two or more stories above the story containing the lowest level of exit discharge;
  2. Any sleeping unit or dwelling unit is located more than one story below the highest level of exit discharge of exits serving the dwelling unit;
  3. The building contains more than 16 sleeping units or dwelling units; or
  4. The building is used as a congregate living facility, dormitory, convent, monastery, fraternity, sorority, group home, or shelter and has an occupant load of 20 or more.

1103.7.5.1 Group R-1 Hotel and Motel Manual Fire Alarm System

AMENDMENT
This section has been amended at the state or city level.

1103.7.5.1.1 Group R-1 Hotel and Motel Automatic Smoke Detection System

AMENDMENT
This section has been amended at the state or city level.

1103.7.5.1 Direct Exits to Exterior

AMENDMENT
This section has been amended at the state or city level.
A fire alarm system is not required in buildings that do not have interior corridors serving guest rooms and where each dwelling unit has an exit door opening directly to an exterior exit access that leads directly to the exits.

1103.7.5.2 Group R-1 Boarding and Rooming Houses Manual Fire Alarm System

AMENDMENT
This section has been amended at the state or city level.

1103.7.5.2.1 Group R-1 Boarding and Rooming Houses Automatic Smoke Detection System

AMENDMENT
This section has been amended at the state or city level.

1103.7.5.2 Initiation

AMENDMENT
This section has been amended at the state or city level.
Initiation of the fire alarm system shall be by automatic means. Approved automatic fire detectors shall be provided in boiler and furnace rooms, shops, laundry rooms, mechanical and electrical rooms, trash-collection rooms, storage rooms, and similar areas. Automatic smoke detectors shall be provided in all common areas and interior corridors serving as required means of egress.

1103.7.5.2.1 Sprinkler Protection

AMENDMENT
This section has been amended at the state or city level.
System fire and smoke detectors are not required when an approved automatic fire-extinguishing system is installed throughout the building.

1103.7.5.3 Notification

AMENDMENT
This section has been amended at the state or city level.

1103.7.5.4 Dwelling Unit Smoke Alarms

AMENDMENT
This section has been amended at the state or city level.
Dwelling unit smoke alarms required by Section 1103.8 shall not be connected to the building fire alarm system.

1103.7.5.4.1 Annunciation Allowed

AMENDMENT
This section has been amended at the state or city level.
Connection of such alarms for annunciation is permitted.

1103.7.6 Group R-2

AMENDMENT
This section has been amended at the state or city level.

1103.7.6 Audible Alarms

AMENDMENT
This section has been amended at the state or city level.
Audible alarm notification appliances shall be provided and sound a distinctive sound that is not to be used for any purpose other than that of a fire alarm. The audible alarm notification appliances shall provide a sound pressure level of 15 decibels (dBA) above the average ambient sound level or 5 dBA above the maximum sound level having a duration of at least 60 seconds, whichever is greater, in every occupied space within the building. The maximum sound pressure level for audible alarm notification appliances shall be 110 dBA at the minimum hearing distance from the audible appliance. Where the average ambient noise is greater than 105 dBA, visible alarm notification appliances shall be provided in accordance with NFPA 72 and audible alarm notification appliances shall not be required.

1103.7.6.1 Maximum Sound Pressure

AMENDMENT
This section has been amended at the state or city level.
Fire alarm system audibility levels shall not exceed 35 dB above the average ambient sound level described in Section 907.5.2.1.1 or 35 dB above the peak ambient sound level. The maximum sound pressure level for audible alarm notification appliances shall be 110 dBA at the minimum hearing distance from the audible appliance. Where the average ambient noise is greater than 95 dBA, visible alarm notification appliances shall be provided in accordance with NFPA 72 and audible alarm notification appliances shall not be required.

1103.8 Single- And Multiple-Station Smoke Alarms

AMENDMENT
This section has been amended at the state or city level.
Single- and multiple-station smoke alarms shall be installed in existing Group I-1 and R occupancies in accordance with Table 1103.8.
TABLE 1103.8
SMOKE ALARM REQUIREMENTS
Condition Location Power Supply Interconnection Required
Existing buildings that do not have any smoke alarms (same as new). In hallways outside sleeping rooms. In sleeping rooms. On each level of the building and in basements. On ceiling or wall (less than 12 inches below ceiling). On center of ceiling above stairways. If constructed on or after 8/1/1989, smoke alarms are required to be hard-wired (120 volt). If constructed before 8/1/1989, smoke alarms can be battery-powered. No interconnection is required for battery-powered alarms.
Existing buildings (constructed on or after 8/1/1989). In hallways outside sleeping rooms. On each level and in basements. On ceiling or wall (less than 12 inches below ceiling). Smoke alarms are required to be hard-wired (120 volt). No interconnection is required.
Existing buildings (constructed before 8/1/1989). In hallways outside sleeping rooms. On each level and in basements. On ceiling or wall (less than 12 inches below ceiling). Smoke alarms can be battery-powered. No interconnection is required.
Replacement of smoke alarms in existing buildings. Smoke alarms must be installed in same locations as originally installed. Power supply must be the same as the smoke alarms being replaced. Interconnection must be provided if the smoke alarms being replaced were interconnected.

1103.8.1 Where Required

AMENDMENT
This section has been amended at the state or city level.

1103.8.1 Replacement of Smoke Alarms

AMENDMENT
This section has been amended at the state or city level.
Single- and multiple-station smoke alarms shall be replaced when:
  1. They fail to respond to operability tests.
  2. They exceed ten years from the date of manufacture.
Smoke alarms shall be replaced with smoke alarms having the same type of power supply.

1103.8.2 Interconnection

AMENDMENT
This section has been amended at the state or city level.

1103.8.3 Power Source

AMENDMENT
This section has been amended at the state or city level.

Carbon monoxide alarms shall be installed in existing dwelling units and sleeping units where those units include any of the conditions identified in Sections 915.1.2 through 915.1.6. The carbon monoxide alarms shall be installed in the locations specified in Section 915.2 and the installation shall be in accordance with Section 915.4.

Exceptions:

  1. Carbon monoxide alarms are permitted to be solely battery operated where the code that was in effect at the time of construction did not require carbon monoxide detectors to be provided.
  2. Carbon monoxide alarms are permitted to be solely battery operated in dwelling units that are not served from a commercial power source.
  3. A carbon monoxide detection system in accordance with Section 915.5 shall be an acceptable alternative to carbon monoxide alarms.
Medical gases stored and transferred in health-care-related facilities shall be in accordance with Chapter 53.

1103.11 Protection of Existing Cooking Equipment

AMENDMENT
This section has been amended at the state or city level.
Approved automatic fire-extinguishing systems shall be provided for the protection of existing commercial-type cooking equipment that produces grease-laden vapors in accordance with Section 904.

1104.1 General

AMENDMENT
This section has been amended at the state or city level.
Means of egress in existing buildings shall comply with the minimum egress requirements when specified in Sections 1104.1 through 1104.26.7.

1104.1.1 Occupant Loads

AMENDMENT
This section has been amended at the state or city level.
The number of occupants shall be determined in accordance with Section 1004.

1104.1.2 Egress Width

AMENDMENT
This section has been amended at the state or city level.
The minimum required egress width shall be determined in accordance with Section 1005.1.

1104.1.3 Ceiling Height

AMENDMENT
This section has been amended at the state or city level.
The ceiling height in corridors shall be not less than 78 inches (1,981 mm).

1104.1.4 Special Exiting Provisions for Younger Students

AMENDMENT
This section has been amended at the state or city level.
Rooms in Group E occupancies used by preschool, kindergarten, first- or second-grade pupils, latchkey, child care, early childhood family education, teen parent, or similar programs shall be located as required by the Building Code.
Younger children are required to be located as close to ground level (i.e., first story) as possible to minimize the number of steps that need to be traveled to exit the building. Rooms used by these younger children are allowed to be above or below the first story if other egress and/or fire protection features are provided. See Minnesota Statutes, Section 123B.51, subdivision 7.

1104.2 Elevators, Escalators and Moving Walks

AMENDMENT
This section has been amended at the state or city level.
Elevators, escalators, and moving walks can only be used as a component of a required means of egress where previously approved.

1104.3 Exit Signs—General Illumination

AMENDMENT
This section has been amended at the state or city level.
Exit signs shall comply with Sections 1104.3.1 through 1104.3.5.

1104.3.1 Where Required

AMENDMENT
This section has been amended at the state or city level.
Exit signs shall be provided where two or more exits are required from a room, area, or story.

1104.3.2 Locations

AMENDMENT
This section has been amended at the state or city level.
Exits and exit access doors shall be marked by an approved exit sign readily visible from any direction of egress travel.

1104.3.3 Main Exits

AMENDMENT
This section has been amended at the state or city level.
Exit signs need not be provided for main exterior exit doors that are obviously and clearly identifiable as exits.

1104.3.4 Certain Occupancies Exempt

AMENDMENT
This section has been amended at the state or city level.
Exit signs are not required in housing areas of Group I-3 occupancies; in sleeping rooms or dwelling units in Group R-1, R-2, or R-3 occupancies; and in Group U occupancies.

1104.3.5 Exit Sign Illumination

AMENDMENT
This section has been amended at the state or city level.
Exit signs shall be internally illuminated, externally illuminated, or self-luminous. The face of an exit sign illuminated from an external source shall have an intensity of not less than 5 footcandles (54 lux). Internally illuminated signs shall provide equivalent luminance and be listed for the purpose. Approved self-luminous signs that provide evenly illuminated letters shall have a minimum luminance of 0.06 foot-lamberts (0.21 cd/m2).

Where emergency illumination is required in Section 1104.5, exit signs shall be visible under emergency illumination conditions.

Exception: Approved signs that provide continuous illumination independent of external power sources are not required to be connected to an emergency electrical system.

1104.5 Illumination—General Emergency Power

AMENDMENT
This section has been amended at the state or city level.
Normal and emergency illumination of the means of egress shall comply with Sections 1104.5.1 through 1104.5.3.

1104.5.1 Emergency Power Duration and Installation

AMENDMENT
This section has been amended at the state or city level.

1104.5.1 Illumination Required

AMENDMENT
This section has been amended at the state or city level.
The means of egress shall be illuminated at all times that the building space served by the means of egress is occupied. Natural lighting in the interior rooms or spaces can be used to satisfy this requirement during periods of daylight.

1104.5.1.1 Group U Occupancies

AMENDMENT
This section has been amended at the state or city level.
Illumination is not required in Group U occupancies.

1104.5.1.2 Aisle Accessways

AMENDMENT
This section has been amended at the state or city level.
Illumination is not required for aisle accessways.

1104.5.1.3 Dwelling Units and Sleeping Rooms

AMENDMENT
This section has been amended at the state or city level.
Illumination is not required for dwelling units and sleeping rooms of Group I, R-1, R-2, and R-3 occupancies.

1104.5.2 Illumination Level

AMENDMENT
This section has been amended at the state or city level.
Floors and other walking surfaces within the means of egress shall be illuminated according to Sections 1104.5.2.1 and 1104.5.2.2:

1104.5.2.1 General

AMENDMENT
This section has been amended at the state or city level.
The means of egress illumination level shall not be less than one foot-candle (11 lux) at the floor level.

1104.5.2.2 Assembly Performances

AMENDMENT
This section has been amended at the state or city level.
In assembly occupancies, the illumination of the floors of exit access shall be at least 0.2 foot-candle (2.2 lux) during periods of performances or projections involving directed light.

1104.5.3 Illumination Emergency Power

AMENDMENT
This section has been amended at the state or city level.
The power supply for means of egress illumination shall normally be provided by the premise's electrical supply. In the event of power supply failure, illumination shall be automatically provided from an emergency system for the following occupancies where such occupancies require two or more means of egress:
  1. Group A having 50 or more occupants. Assembly occupancies used exclusively as a place of worship and having an occupant load of less than 300 are not required to have emergency illumination.
  2. Group B buildings three or more stories in height, buildings with 100 or more occupants above or below the level of exit discharge, or buildings with 1,000 or more total occupants.
  3. Group E in interior stairs, corridors, windowless areas with student occupancy, shops, and laboratories.
  4. Group F having more than 100 occupants. Buildings used only during daylight hours that are provided with windows for natural light are not required to have emergency illumination.
  5. Group I.
  6. Group M buildings greater than 3,000 square feet (2,879 m2) in gross sales area or exceeding one story in height.
  7. Group R-1. Where each guest room has direct access to the outside of the building at grade, emergency illumination is not required.
  8. Group R-2. Where each living unit has direct access to the outside of the building at grade, emergency illumination is not required.
  9. Group R-4. Where each sleeping room has direct access to the outside of the building at ground level, emergency illumination is not required.
The emergency power system shall provide power for not less than 30 minutes and consist of storage batteries, unit equipment, or an on-site generator. The installation of the emergency power system shall be in accordance with Section 1203.

1104.6 Guards

AMENDMENT
This section has been amended at the state or city level.
Guards complying with this section shall be provided at the open sides of means of egress that are more than 30 inches (762 mm) above the floor or grade below.
Exception: Approved existing open guards.

1104.6.1 Height of Guards

AMENDMENT
This section has been amended at the state or city level.
Guards shall form a protective barrier not less than 42 inches (1,067 mm) high except for the following existing guards:
  1. Existing guards on the open side of stairs, which are permitted to be not less than 30 inches (760 mm) high.
  2. Existing guards within dwelling units, which are permitted to be not less than 36 inches (910 mm) high.
  3. Existing guards in assembly areas.
  4. Existing guards on stairs and balconies of buildings designated as historic structures, which are permitted to be not less than 24 inches (610 mm) high.

1104.6.2 Opening Limitations

AMENDMENT
This section has been amended at the state or city level.
Open guards shall have balusters or ornamental patterns such that a 6-inch (152 mm) diameter sphere cannot pass through any opening up to a height of 34 inches (864 mm) except when one of the following conditions exist:
  1. At elevated walking surfaces for access to and use of electrical, mechanical or plumbing systems or equipment, guards shall have balusters or be of solid materials such that a sphere with a diameter of 21 inches (533 mm) cannot pass through any opening.
  2. In occupancies in Group I-3, F, H, or S, the clear distance between intermediate rails measured at right angles to the rails shall not exceed 21 inches (533 mm).

1104.7 Size of Doors

AMENDMENT
This section has been amended at the state or city level.

1104.7.1 Group I-2

AMENDMENT
This section has been amended at the state or city level.

1104.7.2 Ambulatory Care

AMENDMENT
This section has been amended at the state or city level.

1104.7 Doors—General

AMENDMENT
This section has been amended at the state or city level.
Except where modified by Section 1010.1.2, doors shall be of the side-hinged swing type. Doors shall swing in the direction of egress travel when serving an occupant load of 50 or more persons. The minimum width of each door opening shall be sufficient for the occupant load thereof. Locks and latches shall comply with Sections 1010.1.9 through 1010.1.11.4.

1104.7.1 Size of Doors

AMENDMENT
This section has been amended at the state or city level.
Except where modified by this section, each required means of egress door shall comply with the minimum dimensions specified herein. Doors shall provide a clear width of not less than 28 inches (711 mm). Where this section requires a minimum clear width of 28 inches (711 mm) and a door opening includes two door leaves without a mullion, one leaf shall provide a clear opening width of 28 inches (711 mm). The maximum width of a swinging door leaf shall be 48 inches (1,219 mm) nominal. The height of doors shall not be less than 80 inches (2,032 mm).

1104.7.1.1 Closets

AMENDMENT
This section has been amended at the state or city level.
Door openings to storage closets less than 10 square feet (0.93 m2) in area shall not be limited by the minimum width.

1104.7.1.2 Revolving Doors

AMENDMENT
This section has been amended at the state or city level.
Width of door leaves in revolving doors shall not be limited.

1104.7.1.3 Dwelling Units

AMENDMENT
This section has been amended at the state or city level.
Door openings within a dwelling unit are permitted to be 78 inches (1,981 mm) in height.

1104.7.1.4 Small Rooms

AMENDMENT
This section has been amended at the state or city level.
Exit access doors serving a room not larger than 70 square feet (6.5 m2) are permitted to be 24 inches (610 mm) in door width.

1104.7.1.5 Health Care Facilities

AMENDMENT
This section has been amended at the state or city level.
The minimum clear width for doors in the means of egress from hospitals; nursing homes; limited care facilities; psychiatric hospital sleeping rooms; and diagnostic and treatment areas, such as x-ray, surgery, or physical therapy, shall be not less than 32 inches (810 mm) wide. Existing 34- inch (865 mm) doors shall be permitted. Existing 28- inch (710 mm) corridor doors in facilities where the fire plans do not require evacuation by bed, gurney, or wheelchair shall be permitted.
The opening force for interior side-swinging doors without closers shall not exceed a 5-pound (22 N) force. The opening forces do not apply to the force required to retract latch bolts or disengage other devices that hold the door in a closed position. For other side-swinging, sliding and folding doors, the door latch shall release when subjected to a force of not more than 15 pounds (66 N). The door shall be set in motion when subjected to a force not exceeding 30 pounds (133 N). The door shall swing to a full-open position when subjected to a force of not more than 50 pounds (222 N). Forces shall be applied to the latch side.

Revolving doors shall comply with the following:

  1. A revolving door shall not be located within 10 feet (3048 mm) of the foot or top of stairways or escalators. A dispersal area shall be provided between the stairways or escalators and the revolving doors.
  2. The revolutions per minute for a revolving door shall not exceed those shown in Table 1104.9.
  3. Each revolving door shall have a conforming side-hinged swinging door in the same wall as the revolving door and within 10 feet (3048 mm).

Exceptions:

  1. A revolving door is permitted to be used without an adjacent swinging door for street-floor elevator lobbies provided that a stairway, escalator or door from other parts of the building does not discharge through the lobby and the lobby does not have any occupancy or use other than as a means of travel between elevators and a street.
  2. Existing revolving doors where the number of revolving doors does not exceed the number of swinging doors within 20 feet (6096 mm).

TABLE 1104.9

REVOLVING DOOR SPEEDS

INSIDE DIAMETER
(feet-inches)
POWER-DRIVEN-TYPE
SPEED CONTROL
(rpm)
MANUAL-TYPE
SPEED CONTROL
(rpm)
6-61112
7-01011
7-6911
8-0910
8-689
9-089
9-678
10-078

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.

A revolving door used as a component of a means of egress shall comply with Section 1104.9 and all of the following conditions:

  1. Revolving doors shall not be given credit for more than 50 percent of the required egress capacity.
  2. Each revolving door shall be credited with not more than a 50-person capacity.
  3. Revolving doors shall be capable of being collapsed when a force of not more than 130 pounds (578 N) is applied within 3 inches (76 mm) of the outer edge of a wing.

1104.10 Stair Dimensions for Existing Stairways Stairs

AMENDMENT
This section has been amended at the state or city level.
Existing stairs in buildings shall be permitted to remain if the rise does not exceed 8.25 inches (210 mm) and the run is not less than 9 inches (229 mm). Existing stairs are permitted to have a minimum width of 36 inches (914 mm) but not less than the width required for the number of occupants served as determined by Section 1005.1. Existing stairs can be rebuilt.

1104.10.1 Stair DDimensions for Replacement Stairways Stairs

AMENDMENT
This section has been amended at the state or city level.
The replacement of an existing stairway in a structure shall not be required to comply with the new stairway requirements of Section 1011 where the existing space and construction will not allow a reduction in pitch or slope.
Existing winders shall be allowed to remain in use if they have a minimum tread depth of 6 inches (152 mm) and a minimum tread depth of 9 inches (229 mm) at a point 12 inches (305 mm) from the narrowest edge.

1104.12 Curved Stairways

AMENDMENT
This section has been amended at the state or city level.
Existing circular stairs shall be allowed to continue in use provided the minimum depth of tread at the outside of the stair is at least 10 inches (254 mm).

Stairways shall have handrails on at least one side. Handrails shall be located so that all portions of the stairway width required for egress capacity are within 44 inches (1118 mm) of a handrail.

Exception: Aisle stairs provided with a center handrail are not required to have additional handrails.

Handrail height, measured above stair tread nosings, shall be uniform, not less than 30 inches (762 mm) and not more than 42 inches (1067 mm).
Ramp runs utilized as part of a means of egress shall have a running slope not steeper than one unit vertical in 10 units horizontal (10-percent slope). The slope of other ramps shall not be steeper than one unit vertical in eight units horizontal (12.5-percent slope).
Existing ramps are permitted to have a minimum width of 30 inches (762 mm) but not less than the width required for the number of occupants served as determined by Section 1005.1. In Group I-2, ramps serving as a means of egress and used for the movement of patients in beds shall comply with Section 1105.6.3.

[BE] 1104.16 Fire Escape Stairways Stairs

AMENDMENT
This section has been amended at the state or city level.
Fire escape stairs shall comply with Sections 1104.16.1 through 1104.16.7.

TABLE 1104.16
DIMENSIONS FOR EXISTING FIRE ESCAPE STAIRS
Feature Serving More Than 10
Occupants
Serving 10 or Fewer
Occupants
Minimum Width 22 inches 18 inches
Maximum Height of Risers 9 inches 12 inches
Minimum Tread Depth 9 inches 6 inches

For SI:1 inch = 25.4 mm.

[BE] 1104.16.1 Existing Means of Egress

AMENDMENT
This section has been amended at the state or city level.
Fire escape stairs shall be permitted in existing buildings but shall not constitute more than 50 percent of the required exit capacity.

[BE] 1104.16.2 Opening Protectives

AMENDMENT
This section has been amended at the state or city level.

1104.16.2 Protection of Openings

AMENDMENT
This section has been amended at the state or city level.
Openings within 10 feet (3,048 mm) of fire escape stairs shall be protected by fire assemblies having a minimum 3/4-hour fire-resistance rating. In buildings equipped throughout with an approved automatic sprinkler system, opening protection is not required.

[BE] 1104.16.3 Dimensions

AMENDMENT
This section has been amended at the state or city level.
Fire escape stairs shall meet the minimum width, capacity, riser height, and tread depth as specified in Table 1104.16.

[BE] 1104.16.4 Access

AMENDMENT
This section has been amended at the state or city level.
Access to a fire escape from a corridor shall not be through an intervening room. Access to a fire escape stair shall be from a door or window meeting the criteria of Section 1005.3.2. Access to a fire escape stair shall be directly to a balcony, landing, or platform. These shall be no higher than the floor or windowsill level and no lower than 8 inches (203 mm) below the floor level or 18 inches (457 mm) below the windowsill.

[BE] 1104.16.5 Materials and Strength

AMENDMENT
This section has been amended at the state or city level.
Components of fire escape stairs shall be constructed of noncombustible materials.

Fire escape stairs and balconies shall support the dead load plus a live load of not less than 100 pounds per square foot (4.78 kN/m2). Fire escape stairs and balconies shall be provided with a top and intermediate handrail on each side.
The fire code official is authorized to require testing or other satisfactory evidence that an existing fire escape stair meets the requirements of this section.

[BE] 1104.16.5.1 Examination

AMENDMENT
This section has been amended at the state or city level.

[BE] 1104.16.6 Termination

AMENDMENT
This section has been amended at the state or city level.
The lowest balcony shall not be more than 18 feet (5,486 mm) from the ground. Fire escape stairs shall extend to the ground or be provided with counterbalanced stairs reaching the ground. For fire escape stairs serving ten or fewer occupants, an approved fire escape ladder is allowed to serve as the termination for fire escape stairs.

[BE] 1104.16.7 Maintenance

AMENDMENT
This section has been amended at the state or city level.
Fire escapes shall be kept clear and unobstructed at all times and shall be maintained in good working order.

1104.17 Corridors Construction

AMENDMENT
This section has been amended at the state or city level.
Corridors, common path of travel, and travel distance shall comply with Sections 1104.17.1 through 1104.17.4.1. Corridors complying with Section 1020.1 need not be fire-resistance rated.

1104.17.1 Corridor Openings

AMENDMENT
This section has been amended at the state or city level.

1104.17.1 Construction

AMENDMENT
This section has been amended at the state or city level.
Corridors shall be fire-resistance rated in accordance with this section and Table 1104.17.1. Existing walls surfaced with wood lath and plaster in good condition or 1/2-inch gypsum wallboard are acceptable for corridor walls and ceilings. Where Table 1104.17.1 allows a sprinkler system in lieu of fire-resistance-rated construction, the building shall be protected throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2.

TABLE 1104.17.1
CORRIDOR FIRE-RESISTANCE RATING
Occupancy Occupant Load
Served by Corridor
Required Fire-Resistance Rating (hours)
Without sprinkler system With sprinkler system
A, B, E, F, H, M, S, U Greater than 30 1 0
I Greater than 10 1 (see Section 1104.17.2.3) 0
R Greater than 10 1 0

1104.17.1.1 Existing Places of Religious Worship

AMENDMENT
This section has been amended at the state or city level.
In Group A occupancies used as places of religious worship, existing corridor walls, ceilings, and opening protection not in compliance with Section 1104.17.1 may be continued when such buildings are protected with an approved automatic fire alarm system. The fire alarm system shall include automatic smoke detection throughout the exit system and approved detection in all boiler rooms, furnace rooms, mechanical rooms, and storage rooms.

1104.17.1.2 Existing Group B Occupancies

AMENDMENT
This section has been amended at the state or city level.
In office areas of Group B occupancies not exceeding 10,000 square feet (929 m2) in size, existing corridor walls, ceilings, and opening protection not in compliance with Section 1104.17.1 may be continued when such buildings are protected with an approved automatic fire alarm system. The fire alarm system shall include automatic smoke detection throughout the exit system and approved detection in all boiler rooms, furnace rooms, mechanical rooms, and storage rooms.

1104.17.1.3 Existing Group E Occupancies

AMENDMENT
This section has been amended at the state or city level.
In Group E occupancies, existing corridor walls, ceilings, and opening protection not in compliance with Section 1104.17.1 may be continued when such buildings are protected with an approved automatic fire alarm system that is monitored by a central, proprietary, or remote station service. The fire alarm system shall include automatic smoke detection throughout the exit system and approved detection in all rooms and areas other than classrooms and offices.

1104.17.2 Corridor Openings

AMENDMENT
This section has been amended at the state or city level.
Openings into corridors shall comply with Sections 1104.17.2.1 through 1104.17.2.3.

1104.17.2.1 Doors

AMENDMENT
This section has been amended at the state or city level.
Doors opening into corridors required by Table 1104.17.1 to be fire-resistance rated shall be protected by 20-minute fire assemblies or solid wood doors not less than 13/4 inches (45 mm) thick. Where the existing frame will not accommodate the 13/4 inches (45 mm) thick door, a 13/8 inches (35 mm) thick solid bonded wood core door or equivalent insulated steel door shall be permitted. Doors shall be self-closing or automatic-closing by smoke detection.

1104.17.2.2 Other Openings

AMENDMENT
This section has been amended at the state or city level.
Openings with fixed wired glass set in steel frames are permitted for corridor walls and ceilings. Transoms, louvers, and openings other than doors from corridors to rooms shall be automatic- closing by smoke detection or shall be covered with a minimum of 3/4-inch (19 mm) gypsum wallboard or equivalent material on the room side.

1104.17.2.3 Existing Group I-2 and I-3 Occupancies

AMENDMENT
This section has been amended at the state or city level.
Group I-3 corridor doors and patient room doors in Group I-2 corridors need not be fire-resistance rated or self-closing where smoke barriers are provided in accordance with the Building Code or NFPA 101.

1104.17.3 Corridor Width

AMENDMENT
This section has been amended at the state or city level.
The minimum corridor width shall be in accordance with Sections 1104.17.3.1 through 1104.17.3.2.

1104.17.3.1 Minimum Width

AMENDMENT
This section has been amended at the state or city level.
The minimum corridor width shall be as determined by the occupant load calculations in Section 1005.3 but not less than 36 inches.

1104.17.3.2 Minimum Width in Mechanical Areas

AMENDMENT
This section has been amended at the state or city level.
The minimum corridor width is allowed to be reduced to 24 inches (610 mm) for spaces providing access to electrical, mechanical, or plumbing systems.

1104.17.4 Dead Ends

AMENDMENT
This section has been amended at the state or city level.
Where more than one exit or exit access doorway is required, the exit access shall be arranged such that dead ends do not exceed the limits specified in Section 1104.17.4.1 and Table 1104.17.4.
TABLE 1104.17.4
COMMON PATH, DEAD-END, AND TRAVEL DISTANCE LIMITS (by occupancy)
Occupancy Common Path Limit Dead-End Corridor Limit Travel Distance Limit
Unspr
(feet)
Spr (feet) Unspr
(feet)
Spr (feet) Unspr
(feet)
Spr (feet)
Group A 20/75a 20/75a 20b 20b 200 250
Group B 75 100 50 50 200 300
Group E 75 75 50 50 200 250
Groups F-1, S-1d 75 100 50 50 200 250
Groups F-2, S-2d 75 100 50 50 300 400
Group H-1 25 25 0 0 75 75
Group H-2 50 100 0 0 75 100
Group H-3 50 100 20 20 100 150
Group H-4 75 75 20 20 150 175
Group H-5 75 75 20 50 150 200
Group I-1 75 75 20 20 200 250
Group I-2
(HealthCare)
N/R N/R N/R N/R 150 200c
Group I-3 100 100 N/R N/R 150c 200c
Group I-4
(Day Care)
75 100 20 20 200 250
Group M
(Covered Mall)
75 100 50 50 200 400
Group M
(Mercantile)
75 100 50 50 200 250
Group R-1
(Hotels)
75 75 50 50 200 250
Group R-2
(Apartments)
75 125 50 50 200 250
Groups R-3,
R-4
N/R N/R N/R N/R N/R N/R
Group U 75 100 20 50 300 400
"Unspr" means unsprinklered and "Spr" means sprinklered. N/R = No requirements.
For SI: 1 foot = 304.8 mm.
  1. 20 feet for common path serving more than 50 persons; 75 feet for common path serving 50 or fewer persons.
  2. See Section 1029.9.5 for dead-end aisles in Group A occupancies.
  3. This dimension is for the total travel distance, assuming incremental portions have fully utilized their allowable maximums. For travel distance within the room, and from the room exit access door to the exit, see the appropriate occupancy chapter.
  4. See the International Building Code for special requirements on spacing of doors in aircraft hangers.

1104.17.4.1 Wide Corridors and Dead-End Provisions

AMENDMENT
This section has been amended at the state or city level.
A dead-end passageway or corridor shall not be limited in length where the length of the dead-end passageway or corridor is less and 2.5 times the least width of the dead-end passageway or corridor.

1104.18 Dead Ends

AMENDMENT
This section has been amended at the state or city level.
Deleted (see Section 1104.17.4).

1104.19 Exit Access Travel Distance

AMENDMENT
This section has been amended at the state or city level.
Exits shall be located so that the maximum length of exit access travel, measured from the most remote point to an approved exterior exit, vertical exit enclosure, horizontal exit, or exit passageway along the natural and unobstructed path of egress travel, does not exceed the distances given in Table 1104.17.4.

1104.20 Common Path of Egress Travel

AMENDMENT
This section has been amended at the state or city level.
The common path of egress travel shall not exceed the distances given in Table 1104.17.4.
In existing buildings, Common Path distances cannot be exceeded on a story allowed to have only one means of egress.

1104.21 Stairway Discharge Identification

AMENDMENT
This section has been amended at the state or city level.
A stairway in an exit enclosure that continues below the level of exit discharge shall be arranged and marked to make the direction of egress to a public way readily identifiable. Stairs that continue onehalf story beyond the level of exit discharge need not be provided with barriers where the exit discharge is obvious.

1104.22 Exterior Stairway Protection

AMENDMENT
This section has been amended at the state or city level.
Exterior exit stairs shall be separated from the interior of the building as required in Section 1027.6.

1104.23 Minimum Aisle Width

AMENDMENT
This section has been amended at the state or city level.
The minimum clear width of aisles and aisle accessways shall be in accordance with this section and Table 1104.23.
TABLE 1104.23
MINIMUM AISLE AND AISLE ACCESSWAY WIDTHS
Condition Minimum Width (inches)
Aisle accessways serving seating areas having
50 or fewer seats, tables, or desks
24 inches (610 mm)
Aisle accessways serving seating areas more
than 50 seats, tables, or desks
30 inches (760 mm)
Aisle accessways serving employee areas only 24 inches (610 mm)
Level or ramped aisles having seating on each
side and serving 50 or fewer seats
36 inches (914 mm)
Level or ramped aisles having seating on each
side and serving more than 50 seats
42 inches (1067 mm)
Level or ramped aisles having seating on one
side and serving 60 or fewer seats
30 inches (760 mm)
Level or ramped aisles having seating on one
side and serving more than 60 seats
36 inches (914 mm)
Aisle stairs having seating on each side and
serving 50 or fewer seats
36 inches (914 mm)
Aisle stairs having seating on each side and
serving more than 50 seats
42 inches (1067 mm)
Aisle stairs having seating on one side and
serving 60 or fewer seats
30 inches (760 mm)
Aisle stairs having seating on one side and
serving more than 60 seats
36 inches (914 mm)
Aisle stair - distance between seating and
aisle handrail or guard when the aisle is
subdivided
20 inches (508 mm)

1104.23.1 Aisle and Aisle Accessway Width

AMENDMENT
This section has been amended at the state or city level.
Aisles and aisle accessway widths shall be as determined by the occupant load calculations in Section 1005.3, but not less than the widths shown in Table 1104.23.

1104.24 Stairway Floor Number Signs

AMENDMENT
This section has been amended at the state or city level.
Existing stairs shall be marked in accordance with Section 1023.9.

1104.25 Egress Path Markings

AMENDMENT
This section has been amended at the state or city level.

1104.25 Number of Means of Egress or Exits

AMENDMENT
This section has been amended at the state or city level.
The number of means of egress doors or exits from a room, area, story, or building shall be in accordance with Sections 1104.25.1 through 1104.25.4 and Table 1104.25.

Where two or more means of egress doors or exits are required from a room or area, such doors shall be separated from each other by a distance not less than one-third of the length of the maximum overall diagonal dimension of the area served.

TABLE 1104.25
TWO EGRESS DOORS OR EXITS REQUIREDa
Occupancy Number of Occupants
A, B, E, F, M, S, U > 49 Occupants
H, I, R > 10 Occupants
R (dormitories) > 16 Occupants (see 1104.25.1.1)
  1. Two egress doors or exits shall be required when the number of occupants exceeds the number listed in the table.

1104.25.1 Number Based on Capacity

AMENDMENT
This section has been amended at the state or city level.
Two means of egress doors or exits are required from rooms, areas, stories, or buildings when the number of occupants exceeds the values shown in Table 1104.25.

1104.25.1.1 Dormitories

AMENDMENT
This section has been amended at the state or city level.
Dormitory sleeping rooms having an exit doorway direct to the exterior are not required to have a second exit or exit access doorway provided that:
  1. The room has 16 or fewer occupants;
  2. The travel distance from any point in the room to the exit doorway does not exceed 30 feet;
  3. The room is not located more than two stories above grade;
  4. The room is not located on a level below grade; and
  5. The room is provided with an emergency escape window in accordance with Sections 1030.2 through 1030.5 and the escape window is separated from the exit doorway in accordance with Section 1007.1.1.

1104.25.2 Three Egress Doors or Exits Required

AMENDMENT
This section has been amended at the state or city level.
Three means of egress doors or exits are required from rooms, areas, stories, or buildings when the number of occupants exceeds 500 persons.

1104.25.3 Four Egress Doors or Exits Required

AMENDMENT
This section has been amended at the state or city level.
Four means of egress doors or exits are required from rooms, areas, stories, or buildings when the number of occupants is 1,001 or more persons.

1104.25.4 Group E Laboratories

AMENDMENT
This section has been amended at the state or city level.
Group E science laboratories containing hazardous materials shall have two exits when exceeding 1,000 square feet (93 m2) in size.

1104.26 Escape Windows

AMENDMENT
This section has been amended at the state or city level.
In Group R and Group I-1 occupancies, escape windows shall be provided, installed, and maintained in rooms used for sleeping below the fourth story. A readily accessible escape window shall be provided from basement levels occupied as a licensed family or group family child care home. Escape windows shall be in accordance with this section.

1104.26.1 Escape Windows Not Required

AMENDMENT
This section has been amended at the state or city level.
Emergency escape windows are not required for the following conditions:
  1. If the room has a door that leads directly to the exterior of the building.
  2. In dwellings and structures constructed prior to July 1, 1972, provided they are not licensed by Minnesota or used for transient lodging.
  3. If the building is protected throughout by an approved, automatic sprinkler system installed in accordance with Section 903.3.
  4. From rooms of existing buildings having two separate means of escape, provided that the means of escape are independent of each other and they pass through only one adjacent nonlockable room or area.
  5. In Group R hotels or motels constructed prior to April 11, 1983.

1104.26.2 Minimum Size and Dimensions

AMENDMENT
This section has been amended at the state or city level.
Escape window openings shall have a minimum net clear opening area of 4.5 square feet (648 square inches). Opening height and width dimensions shall not be less than 20 inches.

1104.26.3 Maximum Height From Floor

AMENDMENT
This section has been amended at the state or city level.
The maximum height from the floor to the window sill opening shall not exceed 48 inches.
Per SFMD Policy, escape windows with openings up to 52 inches off of the floor may meet the height requirement for existing buildings by securing a step, platform or bed to the wall directly underneath the window. This step, platform or bed shall be no more than 44 inches below the opening and must be strong enough to support the weight of the person. The minimum acceptable width shall be the same as the window opening. The minimum acceptable depth away from the wall shall be 18 inches.

1104.26.4 Emergency Escape Windows Under Decks and Porches

AMENDMENT
This section has been amended at the state or city level.
Emergency escape windows are allowed to be installed under decks and porches provided the location of the deck allows the emergency escape window to be fully opened and provides a path not less than 36 inches in height to a yard or court.

1104.26.5 Window Wells

AMENDMENT
This section has been amended at the state or city level.
An escape window opening with a finished sill height below the adjacent ground level shall be provided with a window well in accordance with Sections 1104.26.5.1 through 1104.26.5.2.

1104.26.5.1 Minimum Size

AMENDMENT
This section has been amended at the state or city level.
The minimum horizontal area of the window well shall be 9 square feet, with a minimum dimension of 36 inches. The area of the window well shall allow the emergency escape and rescue opening to be fully opened.

1104.26.5.2 Ladders or Steps

AMENDMENT
This section has been amended at the state or city level.
Window wells with a vertical depth of more than 44 inches shall be equipped with an approved permanently affixed ladder or steps. Ladders or rungs shall have an inside width of at least 12 inches, shall project at least 3 inches from the wall and shall be spaced not more than 18 inches on center vertically for the full height of the window well. The ladder or steps shall not encroach into the required dimensions of the window well by more than 6 inches. The ladder or steps shall not be obstructed by the emergency escape and rescue opening. Ladders or steps required by this section are exempt from the stairway requirements of Sections 1011 and 1104.10 through 1104.13.

1104.26.6 Replacement Windows for Emergency Escape and Rescue Openings

AMENDMENT
This section has been amended at the state or city level.
The replacement of windows provided for emergency escape and egress in Group R-2 and R-3 occupancies regulated by the International Building Code or in one- and two-family dwellings and townhouses regulated by the International Residential Code shall be exempt from the minimum opening size and maximum sill height requirements of the International Building Code or International Residential Code, respectively, where all of the following conditions are met:
  1. The replacement window is the manufacturer's largest standard size window that will fit within the existing frame or existing rough opening. The replacement window shall be the same operating style as the existing window or a style that provides for an equal or greater window opening area than the existing window; and
  2. The replacement of the window is not part of a change of occupancy.

1104.26.6.1 Licensed Facilities

AMENDMENT
This section has been amended at the state or city level.
Required windows in rooms of care facilities licensed or registered by the state of Minnesota shall comply with the provisions of Section 1104.26.6 or Sections 1104.26.2 and 1104.26.3, whichever is more restrictive.

1104.26.7 Operational Constraints

AMENDMENT
This section has been amended at the state or city level.
Window opening control devices complying with ASTM F2090 shall be permitted for use on windows required to provide emergency escape and rescue openings.

Section 1105 Construction Requirements for Existing Group I-2

AMENDMENT
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1105.1 General

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1105.2 Applicability

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1105.3 Construction

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1105.4 Incidental Uses in Existing Group I-2

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1105.4.1 Occupancy Classification

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1105.4.2 Area Limitations

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1105.4.3 Separation and Protection

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1105.4.3.1 Separation

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1105.4.3.2 Protection

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1105.4.3.2.1 Protection Limitation

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1105.5 Corridor Construction

AMENDMENT
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1105.5.1 Materials

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1105.5.2 Fire-Resistance Rating

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1105.5.3 Corridor Wall Continuity

AMENDMENT
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1105.5.4 Openings in Corridor Walls

AMENDMENT
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1105.5.4.1 Windows

AMENDMENT
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1105.5.4.2 Doors

AMENDMENT
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1105.5.4.2.1 Louvers

AMENDMENT
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1105.5.4.2.2 Corridor Doors

AMENDMENT
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1105.5.4.2.3 Dutch Doors

AMENDMENT
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1105.5.4.2.4 Self- or Automatic-Closing Doors

AMENDMENT
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1105.5.4.3 Openings in Corridor Walls and Doors

AMENDMENT
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1105.5.5 Penetrations

AMENDMENT
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1105.5.6 Joints

AMENDMENT
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1105.5.7 Ducts and Air Transfer Openings

AMENDMENT
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1105.6 Means of Egress

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1105.6.1 Size of Door

AMENDMENT
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1105.6.2 Group I-2 Occupancies

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1105.6.3 Ramps

AMENDMENT
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1105.6.4 Corridor Width

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1105.6.5 Dead-End Corridors

AMENDMENT
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1105.6.6 Separation of Exit Access Doors

AMENDMENT
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1105.6.7 Aisles

AMENDMENT
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1105.7 Smoke Compartments

AMENDMENT
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1105.7.1 Design

AMENDMENT
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1105.7.1.1 Refuge Areas

AMENDMENT
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1105.7.2 Smoke Barriers

AMENDMENT
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1105.7.3 Opening Protectives

AMENDMENT
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1105.7.4 Penetrations

AMENDMENT
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1105.7.5 Joints

AMENDMENT
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1105.7.6 Duct and Air Transfer Openings

AMENDMENT
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1105.8 Group I-2 Care Suites

AMENDMENT
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1105.9 Group I-2 Automatic Sprinkler System

AMENDMENT
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1105.10 Group I-2 Automatic Fire Alarm System

AMENDMENT
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1105.11 Essential Electrical Systems

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1105.11.1 Where Required

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1105.11.2 Installation and Duration

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Section 1105 Separation of Occupancies and Hazardous Areas

AMENDMENT
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1105.1 General

AMENDMENT
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Mixed occupancies within the same building and hazardous areas shall be separated in accordance with Sections 1105.2 through 1105.3.2.1.

1105.2 Occupancy Separations

AMENDMENT
This section has been amended at the state or city level.
Occupancy separations shall be provided in buildings containing Group I and Group R occupancies as specified in Sections 1105.2.1 through 1105.2.3.1. These separations shall be constructed and maintained in accordance with the Building Code. Existing wood lath and plaster in good condition or 1/2-inch (12.7 mm) gypsum wallboard is acceptable where one-hour occupancy separations are required.

1105.2.1 Door Openings

AMENDMENT
This section has been amended at the state or city level.
Where one-hour fire-resistant construction is required, openings shall be protected by listed fire doors, insulated steel doors, 13/8-inch thick (35 mm) or 13/4-inch thick (45 mm) solid wood doors, or fixed wired glass set in steel frames. Doors shall be self-closing or automatic-closing by smoke detection.

1105.2.2 Group I-1 and Group I-2 Occupancies

AMENDMENT
This section has been amended at the state or city level.
Group I-1 and Group I-2 occupancies shall be separated from other occupancies as specified in the Building Code.

1105.2.3 Group I-3 Occupancies

AMENDMENT
This section has been amended at the state or city level.
Group I-3 occupancies shall be separated from other occupancies as specified in the Building Code.

1105.2.3.1 Group I-3 Compliance Options

AMENDMENT
This section has been amended at the state or city level.
Occupancy separations need not be provided for Group I-3 occupancies in the following conditions:
  1. In buildings that are protected throughout by an approved automatic sprinkler system, one-hour fire-resistance-rated construction is permitted.
  2. In buildings that are protected throughout by an approved automatic sprinkler system, openings for the passage of materials between the Group I-3 and adjacent occupancies are not required to be fireresistance rated when such openings are not more than 4 feet (1,219 mm) above the floor and are provided with a metal cover or door.

1105.2.4 Group R Occupancies

AMENDMENT
This section has been amended at the state or city level.
Group R occupancies and the exits therefrom shall be separated from Group A, B, M, S, and U occupancies by at least one-hour fire-resistance-rated construction. Group R occupancies shall be separated from all other occupancies as specified in the Building Code.

1105.2.4.1 Group R Compliance Options

AMENDMENT
This section has been amended at the state or city level.
Occupancy separations need not be provided for Group R occupancies in the following conditions:
  1. In buildings that are protected throughout by an approved automatic sprinkler system, one-hour occupancy separations need not be provided.
  2. An occupancy separation need not be provided between Group A and Group R occupancies if the building is provided with a fire alarm system having automatic smoke detection throughout the Group A occupancy.
  3. Fire-resistance-rated opening protection need not be provided between Group A and Group R occupancies when such openings are designed to resist the passage of smoke and the openings are protected by an approved automatic sprinkler system.
  4. An occupancy separation need not be provided where two or more occupancies occur in the same building or structure and are so intermingled that separations are impracticable, provided that the exit provisions and protection requirements for the more restrictive occupancy are provided.
  5. An occupancy separation need not be provided between a Group R-3 occupancy with sleeping accommodations for ten or fewer persons and Group B or Group M occupancies which are accessory if interconnected smoke alarms are provided. At least one smoke alarm shall be located in the Group B or Group M occupancy and additional alarms may be needed in accordance with manufacturer's instructions. Smoke alarms in the sleeping areas shall be located as specified in Section 1103.8 and shall be audible in all sleeping areas.

1105.3 Incidental Use Areas

AMENDMENT
This section has been amended at the state or city level.
Incidental use areas shall be separated from the rest of the building in accordance with this section. Incidental use areas are defined as shops, laboratories containing hazardous materials, laundry rooms exceeding 100 square feet in size, and rooms containing boilers or central heating plants where the largest piece of fuel equipment exceeds 400,000 Btu per hour input.

1105.3.1 Separation Required

AMENDMENT
This section has been amended at the state or city level.
Incidental use areas in Groups A, B, E, F, H, I, M, R-1, R-2, and S occupancies shall be separated from the rest of the building by not less than a one-hour fire barrier. Existing wood lath and plaster in good condition or 1/2-inch (12.7 mm) gypsum wallboard is acceptable where one-hour fire barriers are required. Storage rooms need not be separated in Groups F, M, or S occupancies.

1105.3.2 Sprinkler Protection in Lieu of Separation

AMENDMENT
This section has been amended at the state or city level.
Incidental use areas in Groups A, B, E, F, H, M, and S occupancies need not be separated when the incidental use area is protected with automatic sprinklers.

1105.3.2.1 Groups I and R Occupancies

AMENDMENT
This section has been amended at the state or city level.
Incidental use areas in Groups I and R occupancies need not be separated when the incidental use area is protected with automatic sprinklers and the construction of such areas is capable of resisting the passage of smoke. Doors to such areas shall be a minimum of one-hour fire-rated, solid-core wood doors or insulated steel doors. Doors shall be self-closing or automatic-closing by smoke detection.
Existing tire storage yards shall be provided with fire apparatus access roads in accordance with Sections 1106.1.1 and 1106.1.2.
Access roadways shall be within 150 feet (45 720 mm) of any point in the storage yard where storage piles are located not less than 20 feet (6096 mm) from any storage pile.
Fire apparatus access roads shall be located within all pile clearances identified in Section 3405.4 and within all fire breaks required in Section 3405.5.
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