Composition and manufacturing process The timbers used in OSB manufacture include both softwoods (spruce, pine) and hardwood (aspen). Wood strands are cut tangentially from debarked logs which are held longitudinally against rotating knives. The ribbon of flakes produced is usually about 75mm wide and this breaks up on handling to produce individual flakes which are 75mm along the grain and …

Particleboard (‘Chipboard’) Composition Wood chips comprise the bulk of particleboard and are prepared in a mechanical chipper generally from coniferous softwoods principally spruce, though pine and fir and hardwoods, such as birch, are sometimes used. Particleboards may also incorporate a large proportion from recycled sources (up to 95% plus but generally around 40%). These chips are generally bound together with …

SWP/1 :Solid wood panel for use in dry conditionsSWP/2 :Solid wood panel for use in humid conditionsSWP/3 :Solid wood panel for use in exterior conditions