PROPERTIES OF STRUCTURAL PARTICLEBOARDS FROM DOUGLAS - FIR FOREST RESIDUES.

Panels were prepared utilizing various proportions of sound wood, bark, dead wood, decayed wood, and branches. Adequate properties were maintained as long as extreme amounts of bark and/or branchwood were not included in the panels. Ash and silica contents of the residues were determined as well as the longitudinal dimensional stability of wood from the various residue size classes.