Wood Terms - A Lumber Glossary from A - Z
Wood Terms that Start with "O"
|Lumber Glossary Term||Definition|
|Occasional Pieces||Means not more than 10 percent of the pieces in a parcel or shipment.|
A truck designed to handle loads exceeding legal highway size and weight restrictions. These trucks are not driven on highways; they are used in logging operations conducted on other types of roads.
A decorative molding profile with an “S” shape.
|Oil Paint||A paint containing a suspension of pigments in an organic solvent and a drying oil, modified drying oil, or synthetic polymer that forms an opaque film through a combination of solvent evaporation and curing of the oil or polymer.|
Biologically a stand of timber that is near its climax; such trees may be 200 years or older. In timber management planning, old growth also refers to timber that is older then the rotation age planned for future forests; this definition may include trees that are 100 years or less.
|Oleoresin||A solution of resin in an essential oil that occurs in or exudes from many plants, especially softwoods.|
A method of measuring distance between two structural members, such a joists, where you measure from the center of one member to the center of the other. It is usually abbreviated O.C.
|Open Coat||A piece of sandpaper with abrasive particles that are spread out to prevent clogging.|
Common classification of painters for woods with large pores, such as oak, ash, chestnut, and walnut. This is also known as ‘coarse texture’.
|Open-Side Carriage||Skyline carriage that opens on one side allowing it to travel over intermediate support jacks.Skyline carriage that opens on one side allowing it to travel over intermediate support jacks.|
A van that can be loaded from above and is often covered by a tarp or mesh.
|Operational Cruise||Timber inventory that includes the estimation of timber volumes or other stand information on specific geographic areas for specific purposes, as contrasted with more broadly based estimates for forest-wide planning. Inventory survey of a logging unit for developing logging plans and production budgets. Seedling surveys for regeneration stocking and pre-commercial thinning cruises for stand density are examples of operational cruises. Results from these surveys form the basis for decisions on subsequent activities about the specific geographic areas cruised.|
A scientific approach to decision making that involves the operations of organizational systems.
Estimated volume of timber on commercial forest land that could be cut annually for the next ten years while improving tree stocking and bringing about a more even distribution and age classes. Annual managed harvest is considered separate from harvest cuttings and thinnings and is determined by a computer using an area control system that specifies the number of acres to be cut annually.
|Optimum Road Spacing||
The distance between parallel roads that gives the lowest combined cost of skidding and road construction costs per unit of log volume.
An electric sander that moves the abrasive in an elliptical pattern.
|Oriented Strand Board (OSB)||
A structural panel made of narrow strands of fiber oriented lengthwise and crosswise in layers, with a resin binder. Depending on the resin used, OSB can be suitable for exterior or interior applications.
Refers to having unique and independent properties in three mutually orthogonal planes of symmetry; longitudinal, radial, and tangential.
The side of a power tool where the board exits.
Stabilizers that are generally found on Knuckleboom loaders or mobile chippers.
The weight of a piece of lumber that has been dried, under high temperatures, in an oven until it is devoid of all water. This is used to calculate the moisture content of wood.
Wood completely dried until it is without any moisture content.
|Overlay||A thin layer of paper, plastic film, metal foil, or other materials bonded to one or both faces of panel products or to lumber to provide a protective or decorative face or a base for painting.|
Point at which timber has begun to lessen in commercial value because of size, age, decay or other factors. Many trees in a virgin or old growth stand are over-matured and are, in fact, dying of old age.
The difference between the log scale of a shipment of timber and the volume of the actual lumber obtained from it.
The measurements-of thickness, width, or length-of a piece of lumber which are used to compute the space occupied.
Layer of foliage in a forest canopy including the trees in a timber stand. Tall mature trees that rise above the shorter immature understory trees.
Any silvicultural treatment with the desired end result being the removal of the over-story component from the growing stock of a multistoried stand. Examples are outright harvest, girdling, and simply felling the over-story.
A few woods are cut into oysters, a cross-section of end grain either at right angles to the grain or at an oblique angle.