The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.
[B] AIR-INFLATED STRUCTURE. A building where the shape of the structure is maintained by air pressurization of cells or tubes to form a barrel vault over the usable area. Occupants of such a structure do not occupy the pressurized areas used to support the structure.
AIR-SUPPORTED STRUCTURE. A structure wherein the shape of the structure is attained by air pressure, and occupants of the structure are within the elevated pressure area.
MEMBRANE STRUCTURE. An air-inflated, air-supported, cable or frame-covered structure as defined by the International Building Code and not otherwise defined as a tent. See Chapter 31 of the International Building Code.
TENT. A structure, enclosure or shelter, with or without sidewalls or drops, constructed of fabric or pliable material supported by any manner except by air or the contents that it protects.
- Tents used exclusively for recreational camping purposes.
- Tents open on all sides which comply with all of the following:
- Individual tents having a maximum size of 700 square feet (65 m2).
- The aggregate area of multiple tents placed side by side without a fire break clearance of 12 feet (3658 mm), not exceeding 700 square feet (65 m2) total.
- A minimum clearance of 12 feet (3658 mm) to all structures and other tents.
The entire tent, air-supported, air-inflated or tensioned membrane structure system shall be inspected at regular intervals, but not less than two times per permit use period, by the permittee, owner or agent to determine that the installation is maintained in accordance with this chapter.
- Separation distance between membrane structures and tents not used for cooking is not required when the aggregate floor area does not exceed 15,000 square feet (1394 m2).
- Membrane structures or tents need not be separated from buildings when all of the following conditions are met:
- The aggregate floor area of the membrane structure or tent shall not exceed 10,000 square feet (929 m2).
- The aggregate floor area of the building and membrane structure or tent shall not exceed the allowable floor area including increases as indicated in the International Building Code.
- Required means of egress are provided for both the building and the membrane structure or tent including travel distances.
- Fire apparatus access roads are provided in accordance with Section 503.
Tents, or membrane structures or a usable portion thereof shall have at least one exit and not less than the number of exits required by Table 2403.12.2. The total width of means of egress in inches (mm) shall not be less than the total occupant load served by a means of egress multiplied by 0.2 inches (5 mm) per person.
|OCCUPANT LOAD||MINIMUM NUMBER OF MEANS OF EGRESS||MINIMUM WIDTH OF EACH MEANS OF EGRESS (inches)||MINIMUM WIDTH OF EACH MEANS OF EGRESS (inches)|
|10 to 199||2||72||36|
|200 to 499||3||72||72|
|500 to 999||4||96||72|
|1,000 to 1,999||5||120||96|
|2,000 to 2,999||6||120||96|
- When the occupant load exceeds 3,000, the total width of means of egress (in inches) shall not be less than the total occupant load multiplied by 0.2 inches per person.
Exit openings from tents shall remain open unless covered by a flame-resistant curtain. The curtain shall comply with the following requirements:
- Curtains shall be free sliding on a metal support. The support shall be a minimum of 80 inches (2032 mm) above the floor level at the exit. The curtains shall be so arranged that, when open, no part of the curtain obstructs the exit.
- Curtains shall be of a color, or colors, that contrasts with the color of the tent.
The width of aisles without fixed seating shall be in accordance with the following:
- In areas serving employees only, the minimum aisle width shall be 24 inches (610 mm) but not less than the width required by the number of employees served.
- In public areas, smooth-surfaced, unobstructed aisles having a minimum width of not less than 44 inches (1118 mm) shall be provided from seating areas, and aisles shall be progressively increased in width to provide, at all points, not less than 1 foot (305 mm) of aisle width for each 50 persons served by such aisle at that point.
Exit signs shall be either listed and labeled in accordance with UL 924 as the internally illuminated type and used in accordance with the listing or shall be externally illuminated by luminaires supplied in the following manner:
- Two separate circuits, one of which shall be separate from all other circuits, for occupant loads of 300 or less; or
- Two separate sources of power, one of which shall be an approved emergency system, shall be provided when the occupant load exceeds 300. Emergency systems shall be supplied from storage batteries or from the on-site generator set, and the system shall be installed in accordance with NFPA 70. The emergency system provided shall have a minimum duration of 90 minutes when operated at full design demand.
An affidavit or affirmation shall be submitted to the fire code official and a copy retained on the premises on which the tent or air-supported structure is located. The affidavit shall attest to the following information relative to the flame propagation performance criteria of the fabric:
- Names and address of the owners of the tent or air-supported structure.
- Date the fabric was last treated with flame-retardant solution.
- Trade name or kind of chemical used in treatment.
- Name of person or firm treating the material.
- Name of testing agency and test standard by which the fabric was tested.
When a compressed natural gas (CNG) or liquefied petroleum gas (LP-gas) powered vehicle is parked inside a place of assembly, all the following conditions shall be met:
- The quarter-turn shutoff valve or other shutoff valve on the outlet of the CNG or LP-gas container shall be closed and the engine shall be operated until it stops. Valves shall remain closed while the vehicle is indoors.
- The hot lead of the battery shall be disconnected.
- Dual-fuel vehicles equipped to operate on gasoline and CNG or LP-gas shall comply with this section and Sections 2404.18.1 through 2404.18.5.3 for gasoline-powered vehicles.