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2607.4 Area limitation and separation.
The maximum area of a single wall panel and minimum vertical and horizontal separation requirements for exterior light-transmitting plastic wall panels shall be as provided for in Table 2607.4. The maximum percentage of wall area of any story in light-transmitting plastic wall panels shall not exceed that indicated in Table 2607.4 or the percentage of unprotected openings permitted by Section 705.8, whichever is smaller.
Exceptions:
1. 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.
2. Veneers of approved weather-resistant light-transmitting plastics used as exterior siding in buildings of Type V construction in compliance with Section 1406.
3. 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 705.8.
Fire Separation Distance (feet) | Class of Plastic | Maximum Percentage Area of Exterior Wall in Plastic Wall Panels | Maximum Single Area of Plastic Wall Panels (square feet) | Minimum Separation of Plastic Wall Panels (feet) | |
Vertical | Horizontal | ||||
Fire Separation Distance (feet) | Class of Plastic | Maximum Percentage Area of Exterior Wall in Plastic Wall Panels | Maximum Single Area of Plastic Wall Panels (square feet) | Minimum Separation of Plastic Wall Panels (feet) | |
Vertical | Horizontal | ||||
Less than 6 | — | Not Permitted | Not Permitted | — | — |
6 or more but less than 11 | CC1 | 10 | 50 | 8 | 4 |
CC2 | Not Permitted | Not Permitted | — | — | |
11 or more but less than or equal to 30 | CC1 | 25 | 90 | 6 | 4 |
CC2 | 15 | 70 | 8 | 4 | |
Over 30 | CC1 | 50 | Not Limited | 3
b | 0 |
CC2 | 50 | 100 | 6
b | 3 | |
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m
2
.
a. For combinations of plastic glazing and plastic wall panel areas permitted, see Section 2607.6.
b. For reductions in vertical separation allowed, see Section 2607.4.
2607.5 Automatic sprinkler system.
Where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, the maximum percentage area of exterior wall in any story in light-transmitting plastic wall panels and the maximum square footage of a single area given in Table 2607.4 shall be increased 100 percent, but the area of light-transmitting plastic wall panels shall not exceed 50 percent of the wall area in any story, or the area permitted by Section 705.8 for unprotected openings, whichever is smaller. These installations shall be exempt from height limitations.
2607.6 Combinations of glazing and wall panels.
Combinations of light-transmitting plastic glazing and light-transmitting plastic wall panels shall be subject to the area, height and percentage limitations and the separation requirements applicable to the class of light-transmitting plastic as prescribed for light-transmitting plastic wall panel installations.
2608.1 Buildings of Type VB construction.
2608.2 Buildings of other types of construction.
1. 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 m
2
) 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 not more than 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.
2. 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.
3. Light-transmitting plastics shall not be installed more than 75 feet (22 860 mm) above grade level.
Exception: Buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.
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