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| | | | Thickness: |
| | | | Density: 26-28 pcf (416-448 kg/cu. m) tested in accordance with ASTM C 209. |
| | | | Tensile Strength: When tested in accordance with ASTM C 209. |
| | | | | Parallel: 450-700 psi (3,100-4,830 kPa). |
| | | | | Transverse: 750-1000 psi (5,171-6,894 kPa). |
| | | | Hardness (Janka ball): 230 lbs (104 kg) tested in accordance with ASTM D 1037. |
| | | | Water Absorption by Volume: When tested in accordance with ASTM D 1037 . |
| | | | | 2 hour inmersion: 5 percent maximum. |
| | | | | 24 hour immersion: 15 percent maximim. |
| | | | Expansion: 50 to 90 percent relative humidity, 0.25 percent in accordance with ASTM C 209. |
| | | | Thermal Resistance: When tested in accordance with ASTM C 209 per ASTM C 518: |
| | | | | R-value: 1.2 for 1/2 inch (13 mm) thick board. |
| | | | | R-value: 1.33 for 5/8 inch (16 mm) thick board. |
| | | | | R-value: 1.4 for 3/4 inch (19 mm) thick board. |
| | | | | K-value: .512 Btu-in/ (h ft² °F). |
| | | | Noise reduction coefficient (NRC): 0.20. |
| | | | Flame Spread: 76 to 200 tested in accordance with ASTM E 84 Classs III or C. |