Wood: A Manual for Its Use in Wooden VesselsU.S. Government Printing Office, 1945 - 235 páginas |
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Términos y frases comunes
annual rings applied assembly Baldcypress bending bers bevel boards boat and ship bolts bulkheads caulking chemical clamps coatings color compression wood creosote curvature decay resistance deck beams diameter Douglas-fir dried drying Eastern white pine edge fastenings fibers FIGURE Forest Products Laboratory fungi glue gluing grade hardwoods heartwood heated holes Hot-press hull inches keel keelsons kiln knot laminated load lumber mahogany maple marine borers material moisture content mold paint parallel phenolic piece pile planking plies plywood pounds preservative pressure produce Redcedar resin sapwood sawed scarf joints screws seams seasoning ship and boat shipbuilding shrinkage shrinking Sitka spruce slope of grain softwoods solid wood Southern yellow pine species specific gravity strakes strength stresses struc structural surface checks Sweetgum temperature tests thickness timbers tion trees urea usually V-bottom veneer vessels weight Western larch Western redcedar white oak White-cedar
Pasajes populares
Página 27 - 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 86 - CHECK. A lengthwise separation of the* wood, the greater part of which occurs across the rings of annual growth.
Página 226 - Durability. A general term for permanence or lastingness. Frequently used to refer to the degree of resistance of a species or of an individual piece of wood to attack by wood-destroying fungi under conditions that favor such attack. In this connection the term " resistance to decay
Página 226 - 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 227 - Millwork. — Generally all building materials made of finished wood and manufactured in millwork plants and planing mills are included under the term "millwork.
Página 227 - Plywood. A piece of wood made of three or more layers of veneer joined with glue and usually laid with the grain of adjoining plies at right angles. Almost always an odd number of plies are used to secure balanced construction.
Página 228 - PRESERVATIVE. Any substance that, for a reasonable length of time, will prevent the action of wood-destroying fungi, borers of various kinds, and similar destructive life when the wood has been properly coated or impregnated with it.
Página 227 - Sound Knot. — A sound knot is one which is solid across its face and which is as hard as the wood surrounding it; it may be...
Página 41 - 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 225 - 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.