|
| Waferboard |
| |
A particle panel product made of wafer-type flakes. Usually manufactured to possess equal properties in all directions parallel to the plane of the panel.
|
|
| Wane |
| |
The absence of square wood on the edge of a board from any source.
View: Wane
|
|
| Wane allowance |
| |
The maximum percentage of wane that can be left on the edge of a cut board.
|
|
| Warp |
| |
Any deviation from a true or plane surface in a board.
View: Warp
|
|
| Water box or trough |
| |
A water container mounted under the wetbulb that supplies water to the wick or sock in a dry kiln.
|
|
| Water hammer |
| |
Potentially damaging condition in steam pipes where waves develop on the condensate surface within a pipe as steam rushes over it. If the peak of the wave becomes high enough to reach the roof of the pipe, the water in the wave is pushed violently to the far end of the pipe.
|
|
| Waterlogged |
| |
Condition of steam coils where condensate is not discharged at a sufficient rate to keep it from accumulating in the coil. Filled with condensate, the coils do not transfer significant heat to the kiln.
|
|
| Weave or wobble |
| |
A circular saw will weave, wobble, or flutter if the rim area is too long for the speed at which it operates. The speed at which it flutters is the critical speed for that particular saw diameter and tension.
|
|
| Western Red Cedar |
| |
Thuja Plicata. This species is found principally along the western edges of British Columbia, Washington and Oregon. The wood is soft, straight-grained, and extremely resistant to decay and insect damage. It is used extensively in roof coverings, exterior sidings, fences, decks, and other outdoor applications.
|
|
| Wetbulb |
| |
A drybulb with a wet sock pulled over it to measure the cooling effect of moisture evaporation from its surface. Used to monitor and maintain humidity conditions within a dry kiln.
|
|
| Wetbulb depression |
| |
The difference in wetbulb and drybulb temperatures.
|
|
| White rot |
| |
A type of wood-destroying fungus that attacks both cellulose and lignin, producing a spongy and stringy mass that is usually whitish but which may assume various shades of yellow, tan, and light brown.
|
|
| Widow maker |
| |
Any loose overhead debris such as limbs or tree tops that may fall at any time. Widow makers are extremely dangerous and present the faller with a continual source of danger. Limb or other loose material dropped or thrown from a tree toward the faller as the tree is felled.
|
|
| Wobble plate |
| |
A rotating canted plate in an axial type piston pump which pushes the pistons into their bores as it "wobbles".
|
|
| Wood |
| |
A solid lignocellulosic material naturally produced in trees and some shrubs, made of up to 40%-50% cellulose, 20%-30% hemicellulose, and 20% -30% lignin.
|
|
| Wood biodeterioration |
| |
The destruction and eventual reduction of wood to its component sugars and lignin elements through attack by organisms such as, fungi, and certain insects, for instance, termites.
|
|
| Wood cells (vessels) |
| |
The basic units comprising wood having open ends and set one above the other so as to form continuous tubes. The openings of the vessels on the surface of a piece of wood are usually referred to as pores.
|
|
| Wood preservative |
| |
Any suitable substance that is toxic to fungi, insects, borers, and other living wood-destroying organisms.
|
|
| Wood residue |
| |
Wood chips, shavings and sawdust produced by a sawmill.
|
|
| Wood soap |
| |
A naturally occurring bi-product of pulping wood chips.
|
|
| Work |
| |
The application of force over a definate distance. Work (W) = Force (F) x distance (s). Expressed in joules, ergs, and foot-pounds. The joule is exactly the amount of work done in exerting the basic metric unit of force, 1 newton, over the basic metric unit of distance, 1 metre.
|
