Product Details
Blue Ribbon OSB sheathing panels contain no core voids, knots, or splits, and they provide a quality base layer for wall and roof sheathing applications. They are ideal for use in residential and light commercial construction, offering the span, impact resistance, and uniformity needed to keep your jobs running smoothly.
Product Specifications
AVAILABLE SIZES (MILLS 451, 475, 500, 530)
| Square Edge | 3′-11 7⁄8″ (1.216 m) x 7′-11 7⁄8″ (2.435 m) – sized for 4′ x 8′ |
AVAILABLE SIZES (MILLS 532)
| Square Edge | 3′-11 13⁄16″ (1.162 m) x 7′-11 7⁄8″ (2.435 m) – sized for 4′ x 8′ 3′-11 13⁄16″ (1.162 m) x 8′-11 7⁄8″ (2.740 m) – sized for 4′ x 9′ 3′-11 13⁄16″ (1.162 m) x 9′-11 7⁄8″ (3.044 m) – sized for 4′ x 10′ |
BUILDING CODE PERFORMANCE CATEGORIES, PANEL THICKNESS
| 7/16 CAT | 0.418″ (10.61 mm) |
| 15/32 CAT | 0.451″ (11.45 mm) |
| 1/2 CAT | 0.483″ (12.26mm) |
| 19/32 CAT | 0.578″ (14.68 mm) |
| 23/32 CAT | 0.703″ (17.85 mm) |
| 7/8 CAT | 0.849″ (21.56 mm) |
| 1-1/8 CAT | 1.091″ (27.71 mm) |
SPECIFICATIONS
| Length/Width Tolerance | ± 1/16” (± 1.6 mm) |
| Straightness Tolerance | ± 1/16” (± 1.6 mm) |
| Squareness Tolerance | ± 1/8” (± 3.2 mm) |
| Testing Agency | APA – The Engineered Wood Association |
| Classification | Exposure 1 : OSB suitable for uses not permanently exposed to the weather. Panels classified as Exposure 1 are intended to resist the effects of moisture on structural performance as may occur due to construction delays, or other conditions of similar severity. |
| Code Fire Classification | Class III or C |
| Flame Spread Rating | 76-200, smoke developed index <450 |
| Building Code Compliance | PS 2-18 |
CERTIFICATIONS
FSC (applies to Englehart only – Mill 530)
Resources
FAQs
OSB is not recommended for outdoor projects. OSB is considered an Exposure 1 panel, which means they may be used for applications where construction delays may be expected prior to providing protection. But OSB is not suitable for long-term exposure to the weather.
Yes, Georgia-Pacific plywood and OSB panels only use moisture resistant adhesives that contain no added urea formaldehyde resins, and are therefore exempt from U.S. EPA and California formaldehyde regulations due to their very low emission rates.
The number of panels in a unit of OSB varies depending on the type and thickness of product. On sheathing products, the piece count is typically stenciled on the side of the unit. Other products have corrugated side protectors that should indicate piece count. If you need a piece count and neither of those are visible, please contact GP at 800-284-5347.
No, span ratings for similar thicknesses are the same.