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Title: Section 3418  •  Size: 20592

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SECTION 3418 - SPECIFIC PROVISIONS AND ALTERNATES

3418.1 Specific Provisions. The following provisions shall apply when required by Table A-34-A.

3418.1.1 Type of construction. Buildings classified as Type II-N, III-N or V-N construction shall be equipped with an approved automatic sprinkler system installed in accordance with U.B.C. Standard 9-1 which is a part of this code (see Chapter 35).

EXCEPTION: Installation of meters or backflow preventers for the connection to the water works system need not be provided unless required by other regulations of the authority having jurisdiction.

3418.1.2 Automatic sprinklers. All required exit corridors, stairwells, elevator lobbies, public assembly areas occupied by 100 or more persons and commercial kitchens shall be protected by an approved automatic sprinkler system meeting the design criteria of U.B.C. Standard 9-1 which is a part of this code (see Chapter 35). A minimum of one sprinkler shall be provided on the room side of every corridor opening.

EXCEPTION: Sprinkler may be omitted in stairwells of noncombustible construction.

3418.1.3 Fire department communication system. When it is determined by test that the portable fire department communication equipment is ineffective, a communication system acceptable to the fire department shall be installed within the existing high-rise building to permit emergency communication between fire-suppression personnel.

3418.1.4 Single-station smoke detectors. Single-station smoke detectors shall be installed within all dwelling units or guest rooms in accordance with the manufacturer's installation instructions. In dwelling units, the detector shall be mounted on the ceiling or wall at a point centrally located in the corridor or area giving access to each separate sleeping area. When sleeping rooms are located on an upper level, the detector shall be installed at the center of the ceiling directly above the stairway within the unit. In efficiency dwelling units, hotel suites and in hotel guest rooms, detectors shall be located on the ceiling or wall of the main room or hotel sleeping room. When actuated, the detector shall provide an audible alarm in the sleeping area of the dwelling unit, hotel suite or guest room in which it is located.

Such detectors may be battery operated.

3418.1.5 Manual fire alarm system. An approved manual fire alarm system connected to a central, proprietary or remote station service, or an approved manual fire alarm system which will provide an audible signal at a constantly attended location, shall be provided.

3418.1.6 Occupant voice notification system. An approved occupant voice notification system shall be provided. Such system shall provide communication from a location acceptable to the fire department and shall permit voice notification to at least all normally occupied areas of the building.

The occupant voice notification system may be combined with a fire alarm system, provided the combined system has been approved and listed for such use. The sounding of a fire alarm signal in any given area or floor shall not prohibit voice communication to other areas or floors. Combination systems shall be designed to permit voice transmission to override the fire alarm signal, but the fire alarm shall not terminate in less than three minutes.

3418.1.7 Vertical shaft enclosures. Openings through two or more floors except mezzanine floors, which contain a stairway or elevator, shall be provided with vertical shaft enclosure protection as specified herein. Such floor openings, when not enclosed by existing shaft enclosure construction, shall be protected by one-hour fire-resistive-rated shaft enclosure construction. For floor openings which are enclosed by existing shaft enclosure construction having fire-resistive capabilities similar to wood lath and plaster in good condition, 1/2-inch (12.7 mm) gypsum wallboard or approved 1/4-inch-thick (6.4 mm) wired glass is acceptable. Wired glass set in a steel frame may be installed in existing shaft enclosure walls but shall be rendered inoperative and be fixed in a closed position.

Openings through two or more floors for other than stairways or elevators, such as openings provided for piping, ducts, gas vents, dumbwaiters, and rubbish and linen chutes, shall be provided with vertical shaft enclosure protection as specified for stairways and elevators.

EXCEPTION: Openings for piping, ducts, gas vents, dumbwaiters and rubbish and linen chutes of copper or ferrous construction are permitted without a shaft enclosure, provided the floor openings are effectively firestopped at each floor level.

3418.1.8 Shaft enclosure opening protection. Openings other than those provided for elevator doors in new vertical shaft enclosures constructed of one-hour fire-resistive construction shall be equipped with approved fire assemblies having a fire-protection rating of not less than one hour. Openings other than those provided for elevator doors in existing vertical shaft enclosures shall be equipped with approved 20-minute-rated fire assemblies, 1 3/4-inch (44 mm) solid wood doors or the equivalent thereto. Doors shall be either self-closing or automatic closing and automatic latching.

All elevators on all floors shall open into elevator lobbies which are separated from the remainder of the building as is required for corridor construction in the Building Code, unless the building is protected throughout by a sprinkler system.

3418.1.9 Manual shutoff of heating, ventilating and air-conditioning (HVAC) systems. Heating, ventilating and air-conditioning systems shall be equipped with manual shutoff controls installed at an approved location when required by the fire department.

3418.1.10 Automatic elevator recall system. Elevators shall be equipped with an approved automatic recall system as required by Section 403.7, Item 2.

3418.1.11 Unlocked stairway doors. Exit doors into exit stairway enclosures shall be maintained unlocked from the stairway side on at least every fifth floor level. All unlocked doors shall bear a sign stating ACCESS ONTO FLOOR THIS LEVEL.

Stairway doors may be locked, subject to the following conditions:

1. Stairway doors which are to be locked from the stairway side shall have the capability of being unlocked simultaneously without unlatching upon a signal from an approved location.

2. A telephone or other two-way communications system connected to an approved emergency service which operates continuously shall be provided at not less than every fifth floor in each required stairway.

3418.1.12 Stair shaft ventilation. Stair shaft enclosures which extend to the roof shall be provided with an approved manually openable hatch to the exterior having an area not less than 16 square feet (1.486 ) with a minimum dimension of 2 feet (610 mm).

EXCEPTIONS: 1. Stair shaft enclosures complying with the requirements for pressurized enclosures.

2. Stair shaft enclosures pressurized as required for mechanically operated pressurized enclosures to a minimum of 0.15-inch (3.8 mm) and a maximum of 0.50-inch (12.7 mm) water column.

3418.1.13 Elevator shaft ventilation. Elevator shaft enclosures which extend to the roof shall be vented to the outside with vents whose area shall not be less than 3 1/2 percent of the area of the elevator shaft, with a minimum of 3 square feet (0.278 ) per elevator.

EXCEPTION: Where energy conservation or hoistway pressurization requires that the vents be normally closed, automatic venting by actuation of an elevator lobby detector or power failure may be accepted.

3418.1.14 Posting of elevators. A permanent sign shall be installed in each elevator cab adjacent to the floor status indicator and at each elevator call station on each floor reading IN FIRE EMERGENCY, DO NOT USE ELEVATOR-USE EXIT STAIRS, or similar verbiage approved by the building official.

EXCEPTION: Sign may be omitted at the main entrance floor-level call station.

3418.1.15 Exit stairways. All high-rise buildings shall have a minimum of two approved exit stairways.

3418.1.16 Exit corridor construction. Corridors serving as an exit for an occupant load of 30 or more shall have walls and ceilings of not less than one-hour fire-resistive construction as required by this code. Existing walls may be surfaced with wood lath and plaster in good condition or 1/2-inch (12.7 mm) gypsum wallboard for corridor walls and ceilings and occupancy separations when approved.

3418.1.17 Exit corridor openings. Openings in corridor walls and ceilings shall be protected by not less than 1 3/8-inch (35 mm) solid-bonded wood-core doors, approved 1/4-inch-thick (6.4 mm) wired glass, approved fire dampers conforming to U.B.C. Standard 7-7 which is a part of this code, or by equivalent protection in lieu of any of these items (see Chapter 35). Transoms shall be fixed closed and covered with 1/2-inch (12.7 mm) Type X gypsum wallboard or equivalent material installed on both sides of the opening.

3418.1.18 Exit corridor door closers. Exit doors into corridors shall be equipped with self-closing devices or shall be automatic closing by actuation of a smoke detector. When spring hinges are used as the closing device, not less than two such hinges shall be installed on each door leaf.

3418.1.19 Exit corridor dead ends. The length of dead end corridors serving an occupant load of more than 30 shall not exceed 20 feet (6096 mm).

3418.1.20 Interior finish. The interior finish in exit corridors, exit stairways and extensions thereof shall conform to the provisions of Chapter 8 of this code.

3418.1.21 Exit stairway illumination. When the building is occupied, exit stairways shall be illuminated with lights having an intensity of not less than 1 footcandle (10.8 lx) at the floor level. Such lighting shall be equipped with an independent alternate source of power such as a battery pack or on-site generator.

3418.1.22 Exit corridor illumination. When the building is occupied, exit corridors shall be illuminated with lights having an intensity of not less than 1 footcandle at the floor level. Such lighting shall be equipped with an independent alternate source of power such as a battery pack or on-site generator.

3418.1.23 Exit stairway exit signs. The location of exit stairways shall be clearly indicated by illuminated exit signs. Such exit signs shall be equipped with an independent alternate source of power such as a battery pack or on-site generator or shall be of an approved self-illuminating type.

3418.1.24 Exitway exit signs. Illuminated exit signs shall be provided in all exitways and located in such a manner as to clearly indicate the direction of egress. Such exit signs shall be equipped with an independent alternate source of power such as a battery pack or on-site generator or shall be of an approved self-illuminating type.

3418.1.25 Emergency plan. The management for all buildings shall establish and maintain a written fire- and life-safety emergency plan which has been approved by the chief. The chief shall develop written criteria and guidelines on which all plans shall be based.

3418.1.26 Posting of emergency plan and exit plans. Copies of the emergency plan and exiting plans (including elevator and stairway placarding) shall be posted in locations approved by the chief.

3418.1.27 Fire drills. The management of all buildings shall conduct fire drills for their staff and employees at least every 120 days. The fire department must be advised of such drills at least 24 hours in advance. A written record of each drill shall be maintained in the building management office and made available to the fire department for review.

3418.2 Sprinkler Alternatives. The requirements of Table A-34-A may be modified as specified by the following for existing high-rise buildings of Type I, II-F.R., II One-hour, III One-hour, IV or V One-hour construction when an approved automatic sprinkler system is installed throughout the building in accordance with U.B.C. Standard 9-1:

Item 5-Manual fire warning system shall not be required.

Item 6-Occupant voice notification system shall not be required; however, if the building is equipped with a public address system, the public address system shall be available for use as an occupant voice notification system.

Item 7-Vertical shaft enclosures may be of nonrated construction for required exit stairway enclosures. Vertical shaft enclosures of openings in floors provided for elevators, escalators and supplemental stairways shall not be required, provided such openings are protected by an approved curtain board and water curtain system.

Item 8-Protection of openings in vertical shaft enclosures may be nonrated but shall not be less than a 1 3/4-inch (44 mm) solid-wood door or the equivalent thereto. Closing and latching hardware shall be provided.

Item 10-An automatic elevator recall system shall not be required.

Item 12-Stair shaft ventilation shall not be required.

Item 16-Existing corridor construction need not be altered.

Item 17-Door openings into exit corridors may be protected by assemblies other than those specified in Section 3418.1, provided an effective smoke barrier is maintained. Closing and latching hardware shall be provided. Protection of duct penetrations is not required.

Item 19-The length of existing exit corridor dead ends shall not be limited.

Item 20-Interior finish in exitways may be reduced by one classification but shall not be less than Class III.

Installation of meters or backflow preventers for the connection to the water works system need not be provided unless required by other regulations of the authority having jurisdiction.

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