Structural Flakeboards using Ring Flakes from Fingerling Chips.
Abstract
Forest residues consist of wood sections which vary in size and shape. A convenience when processing forest residues as raw material for flakeboards is to reduce the material to fingerlings -- wood pieces 2 to 3 inches in length and 3/4 to 1 inch in cross-sectional area. In this study, West Coast forest residues of Douglas-fir and western Hemlock were made first into fingerlings and then into flakes. Homogeneous flakeboards using ring flakes made from the fingerlings were evaluated for bending strength (MOR) and stiffness (MOE) both before and after accelerated aging. Strength values of fingerling-ring-flake panels were compared to the values for disk-flake panels, because disk flakes are more commonly used for structural flakeboards. The fingerling-ring-flake panels were 14 percent lower in initial MOR than disk flake panels, and 15.5 percent lower in MOE. Thus it appears difficult to produce a random three-layer panel from fingerling ring flakes that is as strong as one from conventional disk flakes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1977
- Accession Number
- ADA044629
Entities
People
- Bruce G. Heebink
- Erwin L. Schaffer
- James H. Haskell
- Joseph Chern
Organizations
- Forest Products Laboratory