Wood Handbook: Basic Information on Wood as a Material of Construction with Data for Its Use in Design and SpecificationsU.S. Government Printing Office, 1935 - 326 páginas |
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American average bending birch boards bolt brown building coal-tar coal-tar creosote coating color column compression connectors construction cypress decay diameter dimension Douglas fir durable eastern Eastern hemlock edge face fiber stress finish flooring glue gluing grade grain green growth ring hardwoods heartwood hemlock hickory illus inches inches inches insulating joist joist and plank knots laminations length less linseed oil lumber Manufacturers Maple material modulus moisture content nails northern white paint parallel Percent Percent Percent perpendicular piece pigment piling plies plywood poles ponderosa ponderosa pine pounds proportional limit red cedar Redwood resistance safe load sapwood seasoned shear shrinkage side Sitka spruce softwoods southern yellow pine species spruce stain standard strength ratio structural surface termites tests thickness timber tion treatment trees U. S. Dept usually values veneer Western larch western red western red cedar white fir white pine width Wood Preservers zinc chloride
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Página 6 - 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 8 - The term has no reference to the actual hardness of the wood. Softwoods are often referred to as conifers, and botanically they are called gyrunosperms. Six'ciflc gravity. The ratio of the weight of a body to the weight of an equal volume of water at some standard temperature.
Página 7 - 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 265 - The specific gravity of the oil at 38° C., compared with water at 15.5° C., shall be not less than 1.03. 5. The distillate, based on water-free oil, shall be within the following limits : — Up to 210° C. not more than 5 per cent. Up to 235° C.
Página 8 - A bluish or grayish discoloration of the sapwood caused by the growth of certain moldlike fungi on the surface and in the interior of I he piece ; made possible by the same conditions that favor the growth of other fungi.
Página 6 - Millwork. — Generally all building materials made of finished wood and manufactured in millwork plants and planing mills are included under the term "millwork.
Página 12 - B, Inner bark is moist and soft. Carries prepared food from leaves to all growing parts of tree. C, Outer bark or corky layer is composed of dry dead tissue. Gives general protection against external injuries. D, Sapwood Is the light-colored wood beneath the bark. Carries sap from roots to leaves. E, Heartwood (inactive) is formed by a gradual change in the sapwood. Gives the tree strength. F, Pith is the soft tissue about which the first wood growth takes place In the newly formed twigs. G, Wood...
Página 7 - 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 231 - Group 3 » Group 4 ' Alaska cedar. Incense cedar. Northern white cedar. Port Orford cedar. Southern white cedar. Western red cedar. Southern cypress. Redwood. Northern white pine. Western white pine. Sugar pine. Commercial white fir. Eastern hemlock. Western hemlock. Ponderosa pine. Lodgepole pine. Eastern spruce. Engelmann spruce. Sitka spruce. Douglas fir. Western larch. Norway pine. Southern yellow pine. Tamarack.
Página 4 - 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.