Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter 26 - Plastic
Section 2607 - LIGHT-TRANSMITTING PLASTIC WALL PANELS
Subsection 2607.4 - Area limitation and separation

Universal Citation: 780 CMR MA Code of Regs 2607.4

Current through Register 1531, September 27, 2024

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 704.8.

TABLE 2607.4 AREA LIMITATION AND SEPARATION REQUIREMENTS FOR LIGHT-TRANSMITTING PLASTIC WALL PANELSa

FIRE SEPARATIONDISTANCE
(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 3b 0
CC2 50 100 6b 3

For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
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.

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