Exception: Where stairway enclosure is not required by the International Building Code or the International Fire Code.
Exception: Where neither the length nor the width of the smoke compartment exceeds 150 feet (45 720 mm), the travel distance to reach the smoke barrier door shall not be limited.
- Stories or basements shall not be considered windowless
where fire-fighter access through openings
meeting all of the following is provided:
- Openings such as doors, windows, or access panels are located on at least one side of the story or basement;
- The openings on each story or basement shall be a minimum of 32 inches by 48 inches in size and located horizontally a maximum of 100 feet (3048 mm) apart or 22 inches by 42 inches (558 mm by 1066 mm) in size and located horizontally a maximum of 30 feet (9144 mm) apart;
- Openings shall be unobstructed to allow fire fighting and rescue operations from the exterior;
- Openings in stories above grade shall have a sill height of not more than 36 inches measured from the finished floor level. Openings in basements shall have no sill height restrictions;
- Openings shall be readily identifiable and openable from the outside; and
- Where openings are provided only on one wall of a story or basement the maximum distance to the opposite wall is 75 feet.
- Windowless basements 3,000 gross square feet or less in area shall not require automatic fire suppression when a supervised automatic fire alarm is provided in accordance with Section 907 of the North Carolina Fire Prevention Code.
- Windowless basements greater than 3,000 but
less than 10,000 gross square feet shall be permitted
to connect to the domestic water supply when
all of the following conditions are met:
- The automatic fire suppression system shall be provided with a fire department connection, which shall be marked with a sign reading “Basement Area Sprinkler Water Supply;” and
- A supervised automatic fire alarm system shall be installed in accordance with Section 907 of the International Fire Code.
- Underground gate valve with roadway boxes.
- Automatic sprinkler systems installed in accordance with NFPA 13R where a common supply main is used to supply both domestic and automatic sprinkler systems and a separate shutoff valve for the automatic sprinkler system is not provided.
Exception: Supervision is not required for the following:
An approved automatic fire detection system shall be installed in accordance with the provisions of this code and NFPA 72. Devices, combinations of devices, appliances, and equipment shall be approved. The automatic fire detectors shall be smoke detectors, except that an approved alternative type of detector shall be installed in spaces such as boiler rooms, where products of combustion are present during normal operation in sufficient quantity to actuate a smoke detector.804.4.2.
- Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, or the addition or replacement of windows or doors, or the addition of a porch or deck, are exempt from the requirement.
- Installation, alteration or repairs of plumbing or mechanical systems are exempt from the requirements of this section.
- In each sleeping room.
- Outside each separate sleeping area in the immediate vicinity of the bedrooms.
- On each additional story of the dwelling, including basements and habitable attics but not including crawl spaces and uninhabitable attics. In dwellings or dwelling units with split levels and without an intervening door between adjacent levels, a smoke alarm installed on the upper level shall suffice for the adjacent lower level provided that the lower level is less than one full story below the upper level.
- Smoke alarms shall be permitted to be battery operated when installed in buildings without commercial power.
- Interconnection and hard-wiring of smoke alarms in existing areas shall not be required where the alterations or repairs do not result in the removal of interior wall or ceiling finishes exposing the structure. Smoke alarm locations are required per Section R314.2 of the North Carolina Residential Code but may be battery powered and shall be designed to emit a recurring signal when batteries are low and need to be replaced.
- Hardwired, interconnected smoke detectors installed throughout the building shall be accepted as complying with Section 804.4.3.
- If the work area of the nonresidential occupancy is less than 50 percent of the gross floor area of the nonresidential occupancy, Section 804.4.3 shall not apply.
|USE GROUP||NUMBER OF OCCUPANTS|
|Without Fire Suppression||With Fire Suppression|
|Stairways||Doors, Ramps, and Corridors||Stairways||Doors, Ramps, and Corridors|
NA = Not Allowed
- The occupant load may be equal to the total number of occupants for which exit capacity is provided as determined by Table 805.2.1 above.
- Interpolation shall be allowed in determining capacity of egress width.
- For Use Group A occupancies, the resulting total occupant load shall not exceed one occupant per 5 square feet of net floor area over the entire use.
Exception: Opening protection shall not be required in buildings equipped throughout with an approved automatic sprinkler system.
Exception: Two independent means of egress are not required where the travel distance to an exit does not exceed 100 feet (30 480 mm) and the building is protected throughout with an automatic sprinkler system.
Exception: Where there is no well-defined main exit or where multiple main exits are provided, exits shall be permitted to be distributed around the perimeter of the building provided that the total width of egress is not less than 100 percent of the required width.
- Located on the level of exit discharge, and
- The egress door discharges directly to the exterior.
A facility that is constructed or altered to be accessible shall be maintained accessible during occupancy.
- The altered element or space is not required to be on an accessible route unless required by Section 806.2.
- Accessible means of egress required by Chapter 10 of the International Building Code are not required to be provided in existing facilities.
- Type B dwelling or sleeping units required by Section 1107 of the International Building Code are not required to be provided in existing facilities undergoing less than a Level 3 alteration.
- The alteration to Type A individually owned dwelling units within a Group R-2 occupancy shall meet the provisions for Type B dwelling units.
- Accessibility improvements outside the work area are not required unless required by Section 806.2.
|Steeper than 1:10 but not steeper than 1:8||3 inches|
|Steeper than 1:12 but not steeper than 1:10||6 inches|
- The costs of providing the accessible route are not required to exceed 20 percent of the costs of the alterations affecting the area of primary function.
- This provision does not apply to alterations limited solely to windows, hardware, operating controls, electrical outlets and signs.
- This provision does not apply to alterations limited solely to mechanical systems, electrical systems, installation or alteration of fire protection systems and abatement of hazardous materials.
- This provision does not apply to alterations undertaken for the primary purpose of increasing the accessibility of a facility.
- This provision does not apply to altered areas limited to Type B dwelling and sleeping units.
- For wood frame construction, deflection shall not exceed L/180 for roofs with a slope of 3 in 12 or less or L/120 for roofs with a slope of greater than 3 in 12 and for floors.
- For steel frame construction, deflection shall not exceed L/240 for roofs with a slope of 3 in 12 or less or L/180 for roofs with a slope of greater than 3 in 12 and for floors.
- For concrete construction, deflection shall not exceed L/180 for roofs or L/240 for floors.