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12-7A-4A.5 Test Assembly
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- Size. The overall size of the test deck shall be nominally 24 × 24 inches (610 × 610 mm) unless width variation of deck boards requires an increase in overall deck width (i.e., the direction of joists) in order to meet the overall dimensions. The length of individual deck boards shall be 24 inches (610 mm).
- Joists. The deck is supported by two nominal 2 × 6 Douglas-fir joists running perpendicular to the deck boards, and constructed with a 16-inch (406 mm) center-to-center spacing. A comparable species that may be more commonly used for structural framing of decks in a given region can be substituted for Douglas-fir.
- 3.1. In the absence of recommended installation guidance, the edge-to-edge spacing shall be 3/16 inch (5 mm) with boards mechanically attached to the joists using deck screws.
- 3.2. If nominal 6-inch-wide deck boards are used, a total of five boards shall be used for each deck. Changing the board width could change the number of deck boards.