- Foam plastic interior trim shall comply with the flame spread and smoke-developed indexes as provided for in Section 2604.2.
- In cold storage buildings, ice plants, food plants, food processing rooms and similar areas, foam plastic insulation where tested in a thickness of 4 inches (102 mm) shall be permitted in a thickness up to 10 inches (254 mm) where the building is equipped throughout with an automatic fire sprinkler system in accordance with Section 903.3.1.1. The approved automatic sprinkler system shall be provided in both the room and that part of the building in which the room is located.
- Foam plastic insulation that is a part of a Class A, B or C roof-covering assembly shall be exempt from the flame spread requirements of this section provided the assembly with the foam plastic insulation satisfactorily passes FM 4450 or UL 1256. The smoke-developed index shall not be limited for roof applications.
- Foam plastic insulation greater than 4 inches (102 mm) in thickness shall have a maximum flame spread index of 75 and a smoke-developed index of 450 where tested at a minimum thickness of 4 inches (102 mm), provided the end use is approved in accordance with Section 2603.8 using the thickness and density intended for use.
- Foam plastic interior signs in covered mall buildings shall not be required to comply with the flame spread and smoke-developed indexes of this section, provided the signs comply with Section 402.14.
- Have a flame spread index of 25 or less and a smoke-developed index of not more than 450, where tested in a minimum 4-inch (102 mm) thickness.
- Have flash ignition and self-ignition temperatures of not less than 600°F and 800°F (316°C and 427°C), respectively.
- Have a covering of not less than 0.032-inch (0.8 mm) aluminum or corrosion-resistant steel having a base metal thickness not less than 0.0160 inch (0.4 mm) at any point.
- Are protected by an automatic sprinkler system. Where the cooler or freezer is within a building, both the cooler or freezer and that part of the building in which it is located shall be sprinklered.
- The maximum thickness of the foam plastic shall be 31/4 inches (82.6 mm).
- The density of the foam plastic shall be in the range of 1.5 to 2.0 pcf (24 to 32 kg/m3).
- The foam plastic shall have a flame spread index of 25 or less and an accompanying smoke-developed index of 450 or less when tested in accordance with ASTM E84.
- A thermal barrier complying with Section 2603.4.
- A minimum 1-inch (25 mm) thickness of concrete or masonry.
- Glass-fiber-reinforced concrete panels of a minimum thickness of 0.375 inch (9.5 mm).
- Metal-faced panels having minimum 0.019-inch-thick (0.48 mm) aluminum or 0.016-inch thick (0.41 mm) corrosion-resistant steel outer facings.
- A minimum 0.875-inch (22.2 mm) thickness of stucco complying with Section 2510.
- Plastic veneer shall comply with Section 2606.4.
- Plastic veneer shall not be attached to any exterior wall to a height greater than 50 feet (15 240 mm) above grade.
- Sections of plastic veneer shall not exceed 300 square feet (27.9 m2) in area and shall be separated by a minimum of 4 feet (1219 mm) vertically.
- In structures provided with approved flame barriers extending 30 inches (760 mm) beyond the exterior wall in the plane of the floor, a vertical separation is not required at the floor except that provided by the vertical thickness of the flame barrier projection.
- Veneers of approved weather-resistant light-transmitting plastics used as exterior siding in buildings of Type V construction in compliance with Section 1406.
- The area of light-transmitting plastic wall panels in exterior walls of greenhouses shall be exempt from the area limitations of Table 2607.4 but shall be limited as required for unprotected openings in accordance with Section 704.8.
|MAXIMUM PERCENTAGE AREA OF
EXTERIOR WALL IN PLASTIC WALL
|MAXIMUM SINGLE AREA
OF PLASTIC WALL PANELS
|MINIMUM SEPARATION OF
PLASTIC WALL PANELS (feet)
|Less than 6||-||Not Permitted||Not Permitted||-||-|
|6 or more but
less than 11
|CC2||Not Permitted||Not Permitted||-||-|
|11 or more but less than
or equal to 30
|Over 30||CC1||50||Not Permitted||3b||0|
- The aggregate area of light-transmitting plastic glazing shall not exceed 25 percent of the area of any wall face of the story in which it is installed. The area of a single pane of glazing installed above the first story above grade plane shall not exceed 16 square feet (1.5 m2) and the vertical dimension of a single pane shall not exceed 4 feet (1219 mm).
Exception: Where an automatic sprinkler system is provided throughout in accordance with Section 903.3.1.1, the area of allowable glazing shall be increased to a maximum of 50 percent of the wall face of the story in which it is installed with no limit on the maximum dimension or area of a single pane of glazing.
- Approved flame barriers extending 30 inches (762 mm) beyond the exterior wall in the plane of the floor, or approved vertical panels not less than 4 feet (1219 mm) in height, shall be installed between glazed units located in adjacent stories.
Exception: Approved vertical panels not less than 3 feet (914 mm) in height or flame barriers extending 30 inches (762 mm) beyond the exterior wall shall be installed between glazed units located in adjacent stories in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.
- Light-transmitting plastics shall not be installed more than 75 feet (22 860 mm) above grade level.
- The separation between roof panels is not required in a building equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.
- The separation between roof panels is not required in low-hazard occupancy buildings complying with the conditions of Section 2609.4, Exception 2 or 3.
- The area limitations of Table 2609.4 shall be permitted to be increased by 100 percent in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.
- Low-hazard occupancy buildings, such as swimming pool shelters, shall be exempt from the area limitations of Table 2609.4, provided that the buildings do not exceed 5,000 square feet (465 m2) in area and have a minimum fire separation distance of 10 feet (3048 mm).
- Greenhouses that are occupied for growing plants on a production or research basis, without public access, shall be exempt from the area limitations of Table 2609.4 provided they have a minimum fire separation distance of 4 feet (1219 mm).
- Roof coverings over terraces and patios in Group R-3 occupancies shall be exempt from the area limitations of Table 2609.4.
|MAXIMUM AREA OF
INDIVIDUAL ROOF PANELS
AREA OF ROOF PANELS
(percent of floor area)
- Curbs shall not be required for skylights used on roofs having a minimum slope of three units vertical in 12 units horizontal (25-percent slope) in occupancies in Group R-3 and on buildings with a nonclassified roof covering.
- The metal or noncombustible edge material is not required where nonclassified roof coverings are permitted.