Wood Handbook: Wood as an Engineering MaterialThe Laboratory, 1987 - 465 páginas |
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Wood Handbook: Wood as an Engineering Material Forest Products Laboratory (U.S.) Vista completa - 1987 |
Términos y frases comunes
adhesives American applied ASTM AWPA beam bending bolt bonding brown buckling building chemical coatings color compression connectors construction creosote current edition decay deflection density Department of Agriculture diameter Douglas-fir durable eastern white pine edge effect exterior factors fiber Figure finish fire firestops flooring Forest Products Laboratory Forest Service formula fungi glued glulam grading rules Green growth ring hardwoods heartwood heat inches interior joints knots laminated load lumber Madison manufacture maple material maximum moderately modulus of elasticity nails ovendry paint panels particleboard penetration pentachlorophenol percent moisture content perpendicular piles plywood poles preservative proportional limit redcedar resin resistance sapwood shear shrinkage softwoods southern pine species specific gravity spruce stain Standard stress structural Table temperature tension termites texture thermal thickness timber tion treatment U.S. Department usually values vapor veneer western western hemlock western redcedar
Pasajes populares
Página 14-9 - ... the ratio of the ovendry weight of a sample to the weight of a volume of water equal to the volume of the sample at some specific moisture content, as green, air-dry, or ovendry.
Página 14-9 - Shake. A separation along the grain, the greater part of which occurs between the rings of annual growth, Side cut.
Página 14-8 - When two or more monomers are involved, the product is called a copolymer. polymerization, n — a chemical reaction in which the molecules of a monomer are linked together to form large molecules whose molecular weight is a multiple of that of the original substance. When two or more monomers are involved, the process is called copolymerization or heteropolymerization.
Página 14-1 - ... an elevation of the surface of an adherend, somewhat resembling in shape a blister on the human skin; its boundaries may be indefinitely outlined and it may have burst and become flattened.
Página 14-11 - ... working life the period of time during which an adhesive, after mixing with catalyst, solvent, or other compounding ingredients, remains suitable for use. (See also storage life...
Página 14-4 - Fiber-saturation point. The stage in the drying or in the wetting of wood at which the cell walls are saturated and the cell cavities are free from water.
Página 14-5 - Gums are included by some in the category of natural resins. hardener, n — a substance or mixture of substances added to an adhesive to promote or control the curing reaction by taking part in it. The term is also used to designate a substance added to control the degree of hardness of the cured film. (See also catalyst) hot-setting adhesive — See adhesive, hot-setting.
Página 14-4 - Grade. The designation of the quality of a manufactured piece of wood. Grain. The direction, size, arrangement, appearance, or quality of the fibers in wood.
Página 14-4 - ... is more often used. Coarse-grained wood: Wood with wide and conspicuous annual rings; that is, rings in which there is considerable difference between springwood and summerwood. The term is sometimes used to designate wood with large pores, such as oak, ash, chestnut, and walnut, but in this sense the term "coarse textured
Página 14-5 - HEARTWOOD. The wood, extending from the pith to the sapwood, the cells of which no longer participate in the life processes of the tree. Heartwood may be infiltrated with gums, resins, and other materials which usually make it darker and more decay-resistant than sapwood.