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Wet Wood
is a water soaked condition that affects the stem center of living trees.
Strand Board
is made from flat chips glued together with a random orientation.
Particle Boards
consist of saw dust sized particles glued together in a dense matrix(lawanit).
Plywood
Is composed of sheets of wood, called plies, that are glued together. The grain directions of the adjacent plies are at right angles to each other.
Glue Laminated Timbers
Composed of two or more wood layers glued together with the grain of all layers parallel. Used for beams, columns, furniture, sports equipment and decorative wood finishes.
Water Borne Preservatives
Ammonia cal copper arsenate, chromate copper arsenate and ammoniacal copper zinc arsenate.
Water Borne Preservatives
The advantages of these preservatives over the oil - based are cleanliness and its stability to be painted.
Water Borne Preservatives
The disadvantage of their removal by leaching when exposed to moist condition for a long period of time.
Petroleum Based Solutions
Coal - tan creosote, petroleum creosote, creosote solutions pentachlorophenol solution.
Black Heartwood
causes the center of the stem to turn dark brown or black.
Dimensional Lumber
rough lumber and s4s (ex. 2x2, 2x3, 2x4,...., 2x12)
Superficial Treatment
painting, spraying or immersion.