TECHNICAL DATA SHEET: OSB/3 & OSB/4 STRUCTURAL PANELS
Standard: EN 300 (Oriented Strand Boards - Definitions, classification and specifications)
Issued By: Cuzi Particle Board Structural Timber Lab
Compliance: EN 300 / CE EN 13986 / APA PR-N610
Date: 2026-10-15
1. Product Description & Strand Orientation

Cuzi Particle Board OSB/3 is an engineered load-bearing structural panel manufactured from oriented cross-directional softwood strands (75–120 mm long) bonded with 100% waterproof polymeric isocyanate (pMDI) resin in outer layers and MUF in core layers. Designed for subfloors, wall sheathing, and heavy crating in humid conditions.

2. Mechanical Properties (EN 300 Class OSB/3 vs OSB/4)
Property Test Method Unit OSB/3 (10 – 18 mm) OSB/4 Heavy Duty (10 – 18 mm)
Bending Strength (Major Axis) EN 310 N/mm² ≥ 20.0 ≥ 28.0
Bending Strength (Minor Axis) EN 310 N/mm² ≥ 10.0 ≥ 15.0
MOE Modulus (Major Axis) EN 310 N/mm² ≥ 3,500 ≥ 4,800
MOE Modulus (Minor Axis) EN 310 N/mm² ≥ 1,400 ≥ 1,900
Internal Bond (IB) EN 319 N/mm² ≥ 0.32 ≥ 0.45
24h Thickness Swelling EN 317 % ≤ 15.0% ≤ 12.0%
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