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§ 28-701.1 Update.
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Chapter 25: Gypsum Board, Gypsum Panel Products and Plaster
Chapter 26: Plastic
Section BC 2601: General
Section BC 2602: Definitions
Section BC 2603: Foam Plastic Insulation
Section BC 2604: Interior Finish and Trim
Section BC 2605: Plastic Veneer
Section BC 2606: Light-Transmitting Plastics
Section BC 2607: Light-Transmitting Plastic Wall Panels
Section BC 2608: Light-Transmitting Plastic Glazing
Section BC 2609: Light-Transmitting Plastic Roof Panels
Section BC 2610: Light-Transmitting Plastic Skylight Glazing
Section BC 2611: Light-Transmitting Plastic Interior Signs
Section BC 2612: Plastic Composites
Section BC 2613: Fiber-Reinforced Polymer
Section BC 2614: Reflective Plastic Core Insulation
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2514.2 Minimum thickness.
The minimum thickness of reinforced gypsum concrete shall be 2 inches (51 mm) except the minimum required thickness shall be reduced to 1 1/2 inches (38 mm), provided the following conditions are satisfied:
   1.   The overall thickness, including the formboard, is not less than 2 inches (51 mm).
   2.   The clear span of the gypsum concrete between supports does not exceed 33 inches (838 mm).
   3.   Diaphragm action is not required.
   4.   The design live load does not exceed 40 pounds per square foot (psf) (1915 Pa).
2514.3 Limitations of use.
Reinforced gypsum concrete shall not be used where exposed directly to the weather or where subject to frequent or continuous wetting. Precast units shall be protected by coverings or coatings from the weather and from contact with moisture during shipment and during storage at the work site.
Chapter 26: Plastic
Section BC 2601: General
2601.1 Scope.
These provisions shall govern the materials, design, application, construction and installation of foam plastic, foam plastic insulation, plastic veneer, interior plastic finish and trim, light-transmitting plastics and plastic composites, including plastic lumber. See Chapter 14 for requirements for exterior wall finish and trim.

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