Data show that the saw-dry-rip (SDR) method produces higher yields of STUD grade material than is produced by conventional sawing and drying or than has been produced in other studies using young-growth ponderosa pine. The studs are also more stable. Small logs were live sawn into flitches. The flitches were kiln-dried and then ripped into studs for planing. The SDR treatment with high temperature drying resulted in 77.8 percent of ...
Trials established that yellow-poplar can be dried as 7/4 flitches at high temperatures and ripped into studs to meet National Grading Rules for STUD grade. Effects of growth stresses appear to be minimized during high-temperature drying and equalizing. (Author)
Thickness losses encountered in kiln drying and dressing 4/4 red oak lumber were studied. Results suggest that rough dry lumber can be reduced to slightly less than 1 inch thick to produce moderately long, wide cuttings dressed two sides to a thickness of 13/16 inch. Rough dry thickness for panels should be slightly over 1 inch to dress to 13/16 inch. Green 4/4 lumber should be 1/8 inch thicker than ...
Several hardwood species have proven difficult to treat with wood preservatives, by either pressure or double-diffusion processes. Conventional double-diffusion methods have generally not worked as well with hardwoods as with softwoods. Modified double-diffusion methods, though, have proven useful in treating such species as Engelmann spruce, Rocky Mountain Douglas-fir, and several Alaskan species. These softwoods have been difficult to treat even by pressure. If successful, modified double-diffusion treatment of hardwoods could ...
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