Wood: a Manual for Its Use as a Shipbuilding Material, Volúmenes1-4The Bureau, 1957 |
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Términos y frases comunes
adhesives applied assembly Baldcypress basic stress bending bevel boards boats and ships bolt calking cedar chemical clamps coating column compression compression members connector construction craft cross section curing curvature damage decay resistance deck beams diameter Douglas-fir edge effect F Figure face factor fastenings fiber frames glued grades hardwoods heartwood heat holes hull inches keel kiln knot laminated laminated members length load lumber mahogany marine borers material method minesweeper moisture content mold nails paint parallel to grain pentachlorophenol percent perpendicular piece pile planking plies plywood pressure red oak relative humidity repair resin resorcinol sapwood scarf joints seams seasoning shear ship and boat shipbuilding shrinkage Sitka spruce slope softwoods solid wood southern yellow pine species specific gravity spruce stickers storage strength ratio structural temperature thickness timbers tion trees usually V-bottom veneer vessels weight western larch Western redcedar white oak width
Pasajes populares
Página 60 - 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 that usually make it darker and more decay resistant than sapwood.
Página 61 - Factory and shop lumber: Lumber intended to be cut up for use in further manufacture. It is graded on the basis of the percentage of the area which will produce a limited number of cuttings of a specified, or of a given minimum, size and quality.
Página 49 - In general, the heavier species of wood shrink more across the grain than the lighter ones. Heavier pieces also shrink more than lighter pieces of the same species.
Página 37 - ... weight of a given volume of a substance to the weight of an equal volume of water. It is used in production control, both in the production of raw material and in molding and extrusion. Often specific gravity and density are used interchangeably, but a very slight difference exists in their meanings.
Página 59 - The older stage of decay in which the destruction is readily recognized because the wood has become punky, soft and spongy, stringy, ringshaked, pitted, or crumbly. Decided discoloration or bleaching of the rotted wood is often apparent.
Página 60 - Equilibrium moisture content. The moisture content at which wood neither gains nor loses moisture when surrounded by air at a given relative humidity and temperature.
Página 53 - Lumber is the product of the saw and planing mill not further manufactured than by sawing, resawing, and passing lengthwise through a standard planing machine, crosscut to length and matched.
Página 61 - Intergrown knot. A knot whose rings of annual growth are completely intergrown with those of the surrounding wood.
Página 62 - SPECIFIC GRAVITY. The ratio of the weight of a body to the weight of an equal volume of water at some standard temperature.
Página 62 - A bluish or grayish discoloration of the sapwood caused by the growth of certain moldlike fungi on the surface and in the interior of the piece; made possible by the same conditions that favor the growth of other fungi.