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R613.3.2 Facing
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Facing materials for SIPs shall be wood structural panels conforming to DOC PS 1 or DOC PS 2, each having a minimum nominal thickness of 7/16 inch (11 mm) and shall meet the additional minimum properties specified in Table R613.3.2. Facing shall be identified by a grade mark or certificate of inspection issued by an approved agency.
| Thickness (in.) | Product | Flatwise Stiffnessb (lbf-in2/ft) | Flatwise Strengthc (lbf-in/ft) | Tensionc (lbf/ft) | Densityd (pcf) | |||
| Along | Across | Along | Across | Along | Across | |||
| 7/16 | Sheathing | 55,600 | 16,500 | 1,040 | 460 | 7,450 | 5,800 | 34 |
For SI: 1 inch = 25.4 mm, 1 lbf-in2/ft = 9.415 × 10-6 kPa/m, 1 lbf-in/ft = 3.707 × 10-4 kN/m, 1 lbf/ft = 0.0146 N/mm, 1 pound per cubic foot = 16.018 kg/m3.
- Values listed in Table R613.3.2 are qualification test values and are not to be used for design purposes.
- Mean test value shall be in accordance with Section 7.6 of DOC PS 2.
- Characteristic test value (5th percent with 75% confidence).
- Density shall be based on oven-dry weight and oven-dry volume.
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