Four grades of OSB are defined in EN 300 in terms of their mechanical performance and relative resistance to moisture: OSB/1 – General purpose boards and boards for interior fitments (including furniture) for use in dry conditions OSB/2 – Load-bearing boards for use in dry conditions OSB/3 – Load-bearing boards for use in humid conditions OSB/4 – Heavy-duty load-bearing boards for use in humid conditions
3.Advantages:
1) Tight construction and high strength 2) Minimum twisting, decontamination or warping 3) No rotten or decay, strong against corrosion and fire 4) Water proof, consistent when exposed in the natural or wet environment 5) Low formaldehyde emission 6) Good nailing strength, easy to be sawn, nailed, drilled, grooved, planed, filed or polished 7) Good heat and sound resistant, easy to be coated
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