144-474: Lumber is wood that has been processed into uniform and useful sizes (dimensional lumber), including beams and planks or boards . Lumber is mainly used for construction framing , as well as finishing (floors, wall panels , window frames ). Lumber has many uses beyond home building. Lumber is referred to as timber in the United Kingdom, Europe, Australia, and New Zealand, while in other parts of
288-527: A fuel or as a construction material for making houses , tools , weapons , furniture , packaging , artworks , and paper . Known constructions using wood date back ten thousand years. Buildings like the longhouses in Neolithic Europe were made primarily of wood. Recent use of wood has been enhanced by the addition of steel and bronze into construction. The year-to-year variation in tree-ring widths and isotopic abundances gives clues to
432-402: A matrix of lignin that resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or more broadly to include the same type of tissue elsewhere, such as in the roots of trees or shrubs. In a living tree, it performs a mechanical-support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients among
576-568: A buckling of the lithosphere . The ten tallest peaks in Madeira exemplify the island's diverse topography. Pico Ruivo is the highest at 1,862 metres. Madeira's mountaintops offer panoramic vistas of rugged terrain and the Atlantic Ocean , attracting hikers and nature enthusiasts seeking stunning views and challenging trails. Madeira island is at the top of a massive shield volcano that rises about 6 km (20,000 ft) from
720-585: A closed forest, and in the manufacture of articles where strength is an important consideration such "second-growth" hardwood material is preferred. This is particularly the case in the choice of hickory for handles and spokes . Here not only strength, but toughness and resilience are important. The results of a series of tests on hickory by the U.S. Forest Service show that: Madeira Madeira ( / m ə ˈ d ɪər ə / mə- DEER -ə or / m ə ˈ d ɛər ə / mə- DAIR -ə ; European Portuguese: [mɐˈðɐjɾɐ] ), officially
864-472: A framer much time, because they are pre-cut by the manufacturer for use in 8-, 9-, and 10-foot ceiling applications, which means the manufacturer has removed a few inches or centimetres of the piece to allow for the sill plate and the double top plate with no additional sizing necessary. In the Americas, two-bys (2×4s, 2×6s, 2×8s, 2×10s, and 2×12s), named for traditional board thickness in inches, along with
1008-428: A growth ring, then the part of a growth ring nearest the center of the tree, and formed early in the growing season when growth is rapid, is usually composed of wider elements. It is usually lighter in color than that near the outer portion of the ring, and is known as earlywood or springwood. The outer portion formed later in the season is then known as the latewood or summerwood. There are major differences, depending on
1152-401: A heavy piece of pine is compared with a lightweight piece it will be seen at once that the heavier one contains a larger proportion of latewood than the other, and is therefore showing more clearly demarcated growth rings. In white pines there is not much contrast between the different parts of the ring, and as a result the wood is very uniform in texture and is easy to work. In hard pines , on
1296-405: A large log the sapwood, because of the time in the life of the tree when it was grown, may be inferior in hardness , strength , and toughness to equally sound heartwood from the same log. In a smaller tree, the reverse may be true. In species which show a distinct difference between heartwood and sapwood the natural color of heartwood is usually darker than that of the sapwood, and very frequently
1440-400: A log is on the outside, it is more or less knotty near the middle. Consequently, the sapwood of an old tree, and particularly of a forest-grown tree, will be freer from knots than the inner heartwood. Since in most uses of wood, knots are defects that weaken the timber and interfere with its ease of working and other properties, it follows that a given piece of sapwood, because of its position in
1584-481: A manufacturer and designed for a certain structural purpose. The main categories of engineered lumber are: In the United States, pilings are mainly cut from southern yellow pines and Douglas-fir . Treated pilings are available in chromated copper arsenate retentions of 0.60, 0.80 and 2.50 pounds per cubic foot (9.6, 12.8 and 40.0 kg/m) if treatment is required. Under the prescription of
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#17327753171601728-506: A network of walking paths. Paths can provide easy and relaxing walks through the countryside, while others are narrow, crumbling ledges where a slip could result in injury or death. Some improvements have been made to these pathways following the 2010 Madeira floods and mudslides . Such improvements involved the continuous maintenance of streams, paving trails, and establishing safety fences on dangerous stretches. Due to its distinct geography, economy, social and cultural situation, as well as
1872-482: A north-northeast to south-southwest axis that extends for 1,000 kilometres (540 nmi). This structure consists of long geomorphological relief that extends from the abyssal plain to 3,500 m (11,500 ft); its highest submersed point reaches a depth of about 150 m (490 ft) (around latitude 36°N). The origins of the Tore-Madeira Ridge are not clearly established, but may have resulted from
2016-620: A number of houses and Santa Clara church were hit. The last Austrian Emperor , Charles I , was exiled to Madeira after the war. Determined to prevent an attempt to restore Charles to the throne, the Council of Allied Powers agreed he could go into exile on Madeira because it was isolated in the Atlantic and easily guarded. He died there on 1 April 1922 and his coffin lies in a chapel of the Church of Our Lady of Monte . The Madeira archipelago
2160-423: A pit for the pitman who worked below. In 1420 the island of Madeira – an archipelago comprising four islands off the northwest coast of Africa and an autonomous region of Portugal – was discovered. King Henry VI sent settlers to Madeira and the settlers started clearing the huge expanses of forest in order to grow crops. Felled trees were made into planks by water-powered mills and
2304-481: A pretty definite relation between the rate of growth of timber and its properties. This may be briefly summed up in the general statement that the more rapid the growth or the wider the rings of growth, the heavier, harder, stronger, and stiffer the wood. This, it must be remembered, applies only to ring-porous woods such as oak, ash, hickory, and others of the same group, and is, of course, subject to some exceptions and limitations. In ring-porous woods of good growth, it
2448-401: A primary sawmill . Re-sawing is the splitting of 1-to-12-inch (25–305 mm) hardwood or softwood lumber into two or more thinner pieces of full-length boards. For example, splitting a 10-foot-long (3.0 m) 2×4 ( 1 + 1 ⁄ 2 by 3 + 1 ⁄ 2 in or 38 by 89 mm) into two 1×4s ( 3 ⁄ 4 by 3 + 1 ⁄ 2 in or 19 by 89 mm) of the same length
2592-515: A relatively small set of specified lengths; in all cases hardwoods are sold to the consumer by the board-foot (144 cubic inches or 2,360 cubic centimetres), whereas that measure is not used for softwoods at the retailer (to the cognizance of the buyer). Also in North America, hardwood lumber is commonly sold in a "quarter" system, when referring to thickness; 4/4 (four quarter) refers to a 1-inch-thick (25 mm) board, 8/4 (eight quarter)
2736-635: A series of seven sketches of the island. In 1856, British troops recovering from cholera , and widows and orphans of soldiers fallen in the Crimean War , were stationed in Funchal, Madeira. During the Great War on 3 December 1916, a German U-boat , SM U-38 , captained by Max Valentiner , entered Funchal harbour on Madeira. U-38 torpedoed and sank three ships, bringing the war to Portugal by extension. The ships sunk were: After attacking
2880-422: A settlement. The new settlers observed "a heavy black cloud suspended to the southwest" and upon investigation discovered the larger island they called Madeira ( Portuguese : madeira , lit. 'wood'). The first Portuguese settlers began colonizing the islands around 1420 or 1425. The first settlers were the three captain- donees and their respective families, a small group of members of
3024-465: A source of weakness. In diffuse-porous woods the pores are evenly sized so that the water conducting capability is scattered throughout the growth ring instead of being collected in a band or row. Examples of this kind of wood are alder , basswood , birch , buckeye, maple, willow , and the Populus species such as aspen, cottonwood and poplar. Some species, such as walnut and cherry , are on
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#17327753171603168-452: A timber is referred to as one "timber" (材), and the dimensions of other structural components were quoted in multiples of "timber"; thus, as the width of the actual timber varied, the dimensions of other components were easily calculated, without resorting to specific figures for each scale. The dimensions of timbers in similar applications show a gradual diminution from the Sui dynasty (580–618) to
3312-564: A tree is first formed as sapwood. The more leaves a tree bears and the more vigorous its growth, the larger the volume of sapwood required. Hence trees making rapid growth in the open have thicker sapwood for their size than trees of the same species growing in dense forests. Sometimes trees (of species that do form heartwood) grown in the open may become of considerable size, 30 cm (12 in) or more in diameter, before any heartwood begins to form, for example, in second growth hickory , or open-grown pines . No definite relation exists between
3456-425: A unit of dimensional lumber is limited by the height and girth of the tree it is milled from. In general the maximum length is 24 ft (7.32 m). Engineered wood products, manufactured by binding the strands, particles, fibers, or veneers of wood, together with adhesives, to form composite materials, offer more flexibility and greater structural strength than typical wood building materials. Pre-cut studs save
3600-637: A very narrow strait and lie 10,000 furlongs [2,000 km] from Africa. They are called the Isles of the Blessed ." Archaeological evidence suggests that the islands may have been visited by the Vikings sometime between 900 and 1030. Accounts by Muhammad al-Idrisi state that the Mugharrarin ("the adventurers" – seafarers from Lisbon) came across an island where they found "a huge quantity of sheep,
3744-646: A violent storm, their ship ran aground along the coast of an island that may have been Madeira. Later this legend was the basis of the naming of the city of Machico on the island, in memory of the young lovers. Madeira appears in several medieval manuscripts, including the Book of Knowledge of All Kingdoms from the early 14th century, the Medici-Laurentian Atlas from 1351, the Soleri Portolani from 1380 and 1385 and Corbitis Atlas from
3888-460: A way that it was not enough for domestic needs, so that sugar was imported to the island from other Portuguese colonies. Sugar mills were gradually abandoned, with few remaining, which gave way to other markets in Madeira. In the 17th century, as Portuguese sugar production was shifted to Brazil, São Tomé and Príncipe and elsewhere, Madeira's most important commodity product became its wine. Sugar plantations were replaced by vineyards, originating in
4032-463: A year. Madeira hosts lush laurel forests , while Porto Santo , a much flatter island, has a semiarid climate ( BSh ). In most winters snowfall occurs in the mountains. In the south, little is left of the indigenous subtropical rainforest that once covered the island (the original settlers set fires to clear the land for farming) and named it ( madeira means "wood" in Portuguese). However, in
4176-433: Is a 2-inch-thick (51 mm) board, etc. This "quarter" system is rarely used for softwood lumber; although softwood decking is sometimes sold as 5/4, even though it is actually one inch thick (from milling 1 ⁄ 8 in or 3.2 mm off each side in a motorized planing step of production). The "quarter" system of reference is a traditional North American lumber industry nomenclature used specifically to indicate
4320-408: Is a code beaten on to cut wood by a specially made hammer to show the logging licence. The basic understanding of lumber, or "sawn planks", came about in North America in the seventeenth century. Lumber is the most common and widely used method of sawing logs. Plain sawn lumber is produced by making the first cut on a tangent to the circumference of the log. Each additional cut is then made parallel to
4464-456: Is also greatly increased in strength thereby. Since the latewood of a growth ring is usually darker in color than the earlywood, this fact may be used in visually judging the density, and therefore the hardness and strength of the material. This is particularly the case with coniferous woods. In ring-porous woods the vessels of the early wood often appear on a finished surface as darker than the denser latewood, though on cross sections of heartwood
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4608-429: Is approximately 22 km (14 mi) at its widest point (from Ponta da Cruz to Ponta de São Jorge), with a coastline of 150 km (90 mi). It has a mountain ridge that extends along the centre of the island, reaching 1,862 metres (6,109 feet) at its highest point ( Pico Ruivo ), staying below 200 metres along its eastern extent. The primitive volcanic foci responsible for the central mountainous area, consisted of
4752-511: Is considered re-sawing. Structural lumber may also be produced from recycled plastic and new plastic stock. Its introduction has been strongly opposed by the forestry industry. Blending fiberglass in plastic lumber enhances its strength, durability, and fire resistance. Plastic fiberglass structural lumber can have a "class 1 flame spread rating of 25 or less, when tested in accordance with ASTM standard E 84," which means it burns more slowly than almost all treated wood lumber. A timber mark
4896-542: Is critical, such as trusses , rafters , laminating stock, I-beams and web joints. Machine grading measures a characteristic such as stiffness or density that correlates with the structural properties of interest, such as bending strength . The result is a more precise understanding of the strength of each piece of lumber than is possible with visually graded lumber, which allows designers to use full-design strength and avoid overbuilding. In Europe, strength grading of rectangular sawn lumber/timber (both softwood and hardwood)
5040-422: Is dark colored and firm, and consists mostly of thick-walled fibers which form one-half or more of the wood. In inferior oak, this latewood is much reduced both in quantity and quality. Such variation is very largely the result of rate of growth. Wide-ringed wood is often called "second-growth", because the growth of the young timber in open stands after the old trees have been removed is more rapid than in trees in
5184-560: Is difficult to control completely, especially when using mass-produced kiln-dried timber stocks. Heartwood (or duramen ) is wood that as a result of a naturally occurring chemical transformation has become more resistant to decay. Heartwood formation is a genetically programmed process that occurs spontaneously. Some uncertainty exists as to whether the wood dies during heartwood formation, as it can still chemically react to decay organisms, but only once. The term heartwood derives solely from its position and not from any vital importance to
5328-631: Is done according to EN-14081 and commonly sorted into classes defined by EN-338. For softwoods, the common classes are (in increasing strength) C16, C18, C24, and C30. There are also classes specifically for hardwoods and those in most common use (in increasing strength) are D24, D30, D40, D50, D60, and D70. For these classes, the number refers to the required 5th percentile bending strength in newtons per square millimetre. There are other strength classes, including T-classes based on tension intended for use in glulam . Grading rules for African and South American sawn lumber have been developed by ATIBT according to
5472-588: Is entitled to derogation from some EU policies. According to the Treaty on the Functioning of the European Union , both primary and secondary European Union law applies to Madeira, with possible derogations to take account of its "structural social and economic situation (...) which is compounded by their remoteness, insularity, small size, difficult topography and climate, economic dependence on
5616-399: Is in the walls, not the cavities. Hence the greater the proportion of latewood, the greater the density and strength. In choosing a piece of pine where strength or stiffness is the important consideration, the principal thing to observe is the comparative amounts of earlywood and latewood. The width of ring is not nearly so important as the proportion and nature of the latewood in the ring. If
5760-485: Is known from the Selvagens , suggesting this seabird visited at least sporadically. Madeira is home to six species of brown mice, believed to be descendants of common European brown mice brought to the island by Vikings in the 9th century (or conceivably by 15th century Portuguese settlers), but diversified to the point where they cannot interbreed with their ancestral species or with one another. They have essentially
5904-695: Is located 520 km (280 nmi) from the African coast, 805 km (430 nmi) from the closest point in the European coast (the Portuguese town of Sagres , in Algarve ) and 1,000 km (540 nmi) from the capital of Portugal, Lisbon (approximately a one-and-a-half-hour flight). Madeira inhabits the extreme south of the Tore-Madeira Ridge , a bathymetric structure oriented along
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6048-405: Is minimally 1 + 1 ⁄ 2 by 3 + 1 ⁄ 2 inches (38 mm × 89 mm). As previously noted, less wood is needed to produce a given finished size than when standards called for the green lumber to be the full nominal dimension. However, even the dimensions for finished lumber of a given nominal size have changed over time. In 1910, a typical finished 1-inch (25 mm) board
6192-470: Is more complex. The water conducting capability is mostly taken care of by vessels : in some cases (oak, chestnut, ash) these are quite large and distinct, in others ( buckeye , poplar , willow ) too small to be seen without a hand lens. In discussing such woods it is customary to divide them into two large classes, ring-porous and diffuse-porous . In ring-porous species, such as ash, black locust, catalpa , chestnut, elm , hickory, mulberry , and oak,
6336-515: Is more economical. There are various types of sawing: Dimensional lumber is lumber that is cut to standardized width and depth, often specified in millimetres or inches (but see below for information on nominal dimensions vs. actual dimensions). Carpenters extensively use dimensional lumber in framing wooden buildings. Common sizes include 2×4 (pictured) (also two-by-four and other variants, such as four-by-two in Australia, New Zealand, and
6480-410: Is much more serious when timber is subjected to forces perpendicular to the grain and/or tension than when under load along the grain and/or compression . The extent to which knots affect the strength of a beam depends upon their position, size, number, and condition. A knot on the upper side is compressed, while one on the lower side is subjected to tension. If there is a season check in the knot, as
6624-456: Is noted for its Madeira wine , flora , and fauna , with its pre-historic laurel forest , classified as a UNESCO World Heritage Site . The destination is certified by EarthCheck . The main harbour in Funchal has long been the leading Portuguese port in cruise ship dockings, an important stopover for Atlantic passenger cruises between Europe, the Caribbean and North Africa . In addition,
6768-403: Is often the case, it will offer little resistance to this tensile stress. Small knots may be located along the neutral plane of a beam and increase the strength by preventing longitudinal shearing . Knots in a board or plank are least injurious when they extend through it at right angles to its broadest surface. Knots which occur near the ends of a beam do not weaken it. Sound knots which occur in
6912-459: Is smaller than the nominal dimensions because modern technology makes it possible to use the logs more efficiently. For example, a "2×4" board historically started out as a green, rough board actually 2 by 4 inches (51 mm × 102 mm). After drying and planing, it would be smaller by a nonstandard amount. Today, a "2×4" board starts out as something smaller than 2 inches by 4 inches and not specified by standards, and after drying and planing
7056-556: Is still open to this day. The British first amicably occupied the island in 1801 whereafter Colonel William Henry Clinton became governor. A detachment of the 85th Regiment of Foot under Lieutenant-colonel James Willoughby Gordon garrisoned the island. After the Peace of Amiens , British troops withdrew in 1802, only to reoccupy Madeira in 1807 until the end of the Peninsular War in 1814. In 1846 James Julius Wood wrote
7200-608: Is supplied in standard sizes, mostly for the construction industry – primarily softwood , from coniferous species, including pine , fir and spruce (collectively spruce-pine-fir ), cedar , and hemlock , but also some hardwood, for high-grade flooring. It is more commonly made from softwood than hardwoods, and 80% of lumber comes from softwood. In the United States and Canada, milled boards are called lumber , while timber describes standing or felled trees. In contrast, in Britain, and some other Commonwealth nations and Ireland,
7344-431: Is the rule. Some others never form heartwood. Heartwood is often visually distinct from the living sapwood and can be distinguished in a cross-section where the boundary will tend to follow the growth rings. For example, it is sometimes much darker. Other processes such as decay or insect invasion can also discolor wood, even in woody plants that do not form heartwood, which may lead to confusion. Sapwood (or alburnum )
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#17327753171607488-413: Is the younger, outermost wood; in the growing tree it is living wood, and its principal functions are to conduct water from the roots to the leaves and to store up and give back according to the season the reserves prepared in the leaves. By the time they become competent to conduct water, all xylem tracheids and vessels have lost their cytoplasm and the cells are therefore functionally dead. All wood in
7632-501: Is up to 90 degrees different from the grain direction of the regular wood. In the tree a knot is either the base of a side branch or a dormant bud. A knot (when the base of a side branch) is conical in shape (hence the roughly circular cross-section) with the inner tip at the point in stem diameter at which the plant's vascular cambium was located when the branch formed as a bud. In grading lumber and structural timber , knots are classified according to their form, size, soundness, and
7776-461: Is usually the latewood in which the thick-walled, strength-giving fibers are most abundant. As the breadth of ring diminishes, this latewood is reduced so that very slow growth produces comparatively light, porous wood composed of thin-walled vessels and wood parenchyma. In good oak, these large vessels of the earlywood occupy from six to ten percent of the volume of the log, while in inferior material they may make up 25% or more. The latewood of good oak
7920-602: Is well utilised in the construction industry. Attempts to maintain lumber quality over time have been challenged by historical changes in the timber resources of the United States – from the slow-growing virgin forests common over a century ago to the fast-growing plantations now common in today's commercial forests. Resulting declines in lumber quality have been of concern to both the lumber industry and consumers and have caused increased use of alternative construction products. Machine stress-rated and machine-evaluated lumber are readily available for end-uses where high strength
8064-642: Is wet in the northwest, but dry in the southeast. In the 16th century the Portuguese started building levadas ( aqueducts ) to carry water to the agricultural regions in the south. Due to its mountainous landscape, building levadas promised to be a difficult venture, often tasked to criminals and convicts from continental Portugal to build these water canals. Many are cut into the mountainsides, accompanied by 40 km (25 mi) of tunnels, some of which are still accessible. Today levadas supply water and also provide hydro-electric power . Over 2,170 km (1,350 mi) of levadas were built and later provided
8208-561: The Method of Construction (營造法式) issued by the Song dynasty government in the early twelfth century, timbers were standardized to eight cross-sectional dimensions. Regardless of the actual dimensions of the timber, the ratio between width and height was maintained at 1:1.5. Units are in Song dynasty inches (31.2 mm). Timber smaller than the 8th class were called "unclassed" (等外). The width of
8352-531: The African Tectonic Plate , although it is culturally, politically and ethnically associated with Europe, with its population predominantly descended from Portuguese settlers. Its population was 251,060 in 2021. The capital of Madeira is Funchal , on the main island's south coast. The archipelago includes the islands of Madeira , Porto Santo , and the Desertas , administered together with
8496-516: The American Lumber Standard Committee , appointed by the U.S. Secretary of Commerce . Design values for most species and grades of visually graded structural products are determined in accordance with ASTM standards, which consider the effect of strength reducing characteristics, load duration, safety, and other influencing factors. The applicable standards are based on results of tests conducted in cooperation with
8640-701: The Autonomous Region of Madeira ( Portuguese : Região Autónoma da Madeira ), is an autonomous region of Portugal . It is an archipelago situated in the North Atlantic Ocean , in the region of Macaronesia , just under 400 kilometres (250 mi) north of the Canary Islands — Spain —, 520 kilometres (320 mi) west of the Kingdom of Morocco and 805 kilometres (500 mi) southwest of mainland Portugal . Madeira sits on
8784-603: The Gulf Stream and Canary Current , giving it mild to warm year-round temperatures. According to the Instituto de Meteorologia (IPMA), the average annual temperature at Funchal weather station is 19.6 °C (67.3 °F) for the 1981–2010 period. Relief is a determinant factor on precipitation levels; areas such as the Madeira Natural Park can get as much as 2,800 mm (110 in) of precipitation
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#17327753171608928-604: The International Business Centre of Madeira , also known as the Madeira Free Trade Zone, was established in the 1980s. It includes (mainly tax-related) incentives. Plutarch in his Parallel Lives ( Sertorius , 75 AD) referring to the military commander Quintus Sertorius (d. 72 BC), relates that after his return to Cádiz , he met sailors who spoke of idyllic Atlantic islands: "The islands are said to be two in number separated by
9072-749: The Portuguese constitution and other laws, Madeira possesses its own political and administrative statute and has its own government . The branches of Government are the Regional Government and the Legislative Assembly , the latter elected by universal suffrage , using the D'Hondt method of proportional representation . The president of the Regional Government is appointed by the Representative of
9216-635: The Trocaz pigeon , the Madeira Chaffinch and the Madeira firecrest . In addition extinct species include the Madeiran scops owl , two rail species, Rallus adolfocaesaris and R. lowei , and two quail species, Coturnix lignorum and C. alabrevis , and the Madeiran wood pigeon , a subspecies of the common wood pigeon and which was last seen in the early 20th century. A Great Auk bone
9360-557: The USDA Forest Products Laboratory. Design Values for Wood Construction, which is a supplement to the ANSI/AF&;PA National Design Specification® for Wood Construction, provides these lumber design values, which are recognized by the model building codes. Canada has grading rules that maintain a standard among mills manufacturing similar woods to assure customers of uniform quality. Grades standardize
9504-675: The West Indies and England itself. The Madeira wine became very popular in the markets and it is also said to have been used in a toast during the Declaration of Independence by the Founding Fathers of the United States . In the eighteenth and nineteenth centuries, Madeira stands out for its climate and therapeutic effects. In the nineteenth century, visitors to the island integrated four major groups: patients, travellers, tourists and scientists. Most visitors belonged to
9648-544: The conquest of Ceuta and West Africans after further exploration of the African coast. Barbary corsairs from North Africa, who enslaved Europeans from ships and coastal communities throughout the Mediterranean region, captured 1,200 people in Porto Santo in 1617. Until the first half of the sixteenth century, Madeira was one of the major sugar markets of the Atlantic. Apparently, it is in Madeira that, in
9792-495: The leaves , other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, woodchips , or fibers . Wood has been used for thousands of years for fuel , as a construction material , for making tools and weapons , furniture and paper . More recently it emerged as a feedstock for the production of purified cellulose and its derivatives, such as cellophane and cellulose acetate . As of 2020,
9936-429: The resin which increases the strength when dry. Such resin-saturated heartwood is called "fat lighter". Structures built of fat lighter are almost impervious to rot and termites , and very flammable. Tree stumps of old longleaf pines are often dug, split into small pieces and sold as kindling for fires. Stumps thus dug may actually remain a century or more since being cut. Spruce impregnated with crude resin and dried
10080-409: The 4×4 (89 mm × 89 mm), are common lumber sizes used in modern construction. They are the basic building blocks for such common structures as balloon-frame or platform-frame housing. Dimensional lumber made from softwood is typically used for construction, while hardwood boards are more commonly used for making cabinets or furniture. Lumber's nominal dimensions are larger than
10224-554: The African coast in the service of Prince Henry the Navigator , were driven off course by a storm to an island which they named Porto Santo (English: "holy harbour") in gratitude for divine deliverance from a shipwreck. The following year, Zarco and Vaz organised an expedition with Bartolomeu Perestrello . The trio travelled to the island of Porto Santo, claimed it on behalf of the Portuguese Crown, and established
10368-580: The British Empire. The timber supply began to dwindle at the start of the twentieth century due to significant harvest volumes, so the logging industry was forced to seek timber elsewhere; hence, the expansion into the American West. Logs are converted into lumber by being sawn, hewn , or split . Sawing with a rip saw is the most common method, because sawing allows logs of lower quality, with irregular grain and large knots, to be used and
10512-518: The Madeira sugar trade, with the refining and distribution concentrated in Antwerp. By the 1490s Madeira had overtaken Cyprus as a producer of sugar." Sugarcane production was the primary engine of the island's economy, which quickly afforded the Funchal metropolis economic prosperity. The production of sugar cane attracted adventurers and merchants from all parts of Europe, especially Italians , Basques , Catalans , and Flemish . This meant that, in
10656-698: The Republic according to the results of the election to the legislative assemblies. The sovereignty of the Portuguese Republic is represented in Madeira by the Representative of the Republic, appointed by the President of the Republic on the advice of the Government of the Republic . The tasks of the Representative of the Republic are to sign and order the publication of regional legislative decrees and regional regulatory decrees or to exercise
10800-827: The UK), 2×6 , and 4×4 . The length of a board is usually specified separately from the width and depth. It is thus possible to find 2×4s that are four, eight, and twelve feet in length. In Canada and the United States, the standard lengths of lumber are 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 feet (1.8, 2.4, 3.0, 3.7, 4.3, 4.9, 5.5, 6.1, 6.7 and 7.3 m). For wall framing, precut "stud" lengths are available, and are commonly used. For ceilings heights of 8, 9 or 10 feet (2.4, 2.7 or 3.0 m), studs are available in 92 + 5 ⁄ 8 inches (2.35 m), 104 + 5 ⁄ 8 inches (2.66 m), and 116 + 5 ⁄ 8 inches (2.96 m). The length of
10944-509: The United States began with the publication of the American Lumber Standard in 1924, which set specifications for lumber dimensions, grade, and moisture content; it also developed inspection and accreditation programs. These standards have changed over the years to meet the changing needs of manufacturers and distributors, with the goal of keeping lumber competitive with other construction products. Current standards are set by
11088-422: The actual standard dimensions of finished lumber. Historically, the nominal dimensions were the size of the green (not dried), rough (unfinished) boards that eventually became smaller finished lumber through drying and planing (to smooth the wood). Today, the standards specify the final finished dimensions and the mill cuts the logs to whatever size it needs to achieve those final dimensions. Typically, that rough cut
11232-444: The amount of oxygen is inadequate. Fungi lumber/timber defects: Following are the insects and molluscs which are usually responsible for the decay of timber/lumber: Wood Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants . It is an organic material – a natural composite of cellulosic fibers that are strong in tension and embedded in
11376-418: The annual rings of growth and the amount of sapwood. Within the same species the cross-sectional area of the sapwood is very roughly proportional to the size of the crown of the tree. If the rings are narrow, more of them are required than where they are wide. As the tree gets larger, the sapwood must necessarily become thinner or increase materially in volume. Sapwood is relatively thicker in the upper portion of
11520-449: The border between the two classes, forming an intermediate group. In temperate softwoods, there often is a marked difference between latewood and earlywood. The latewood will be denser than that formed early in the season. When examined under a microscope, the cells of dense latewood are seen to be very thick-walled and with very small cell cavities, while those formed first in the season have thin walls and large cell cavities. The strength
11664-458: The cell walls are composed of micro-fibrils of cellulose (40–50%) and hemicellulose (15–25%) impregnated with lignin (15–30%). In coniferous or softwood species the wood cells are mostly of one kind, tracheids , and as a result the material is much more uniform in structure than that of most hardwoods . There are no vessels ("pores") in coniferous wood such as one sees so prominently in oak and ash, for example. The structure of hardwoods
11808-435: The central portion one-fourth the height of the beam from either edge are not serious defects. Knots do not necessarily influence the stiffness of structural timber; this will depend on the size and location. Stiffness and elastic strength are more dependent upon the sound wood than upon localized defects. The breaking strength is very susceptible to defects. Sound knots do not weaken wood when subject to compression parallel to
11952-414: The context of sugar production, slave labour was applied for the first time. The colonial system of sugar production was put into practice on the island of Madeira, on a much smaller scale, and later transferred, on a large scale, to other overseas production areas. Later on, this small scale of production was outmatched by Brazilian and São Tomean plantations. Madeiran sugar production declined in such
12096-433: The contrast is conspicuous (see section of yew log above). This is produced by deposits in the heartwood of chemical substances, so that a dramatic color variation does not imply a significant difference in the mechanical properties of heartwood and sapwood, although there may be a marked biochemical difference between the two. Some experiments on very resinous longleaf pine specimens indicate an increase in strength, due to
12240-410: The development of agriculture on the island, the settlers had to chop down part of the dense forest and build a large number of water channels, called “levadas”, to carry the abundant waters on the north coast to the south coast of the island. Initially, the settlers produced wheat for their own sustenance but later began to export wheat to mainland Portugal. In earlier times, fish and vegetables were
12384-523: The discipline of wood science , which was initiated since the beginning of the 20th century. A 2011 discovery in the Canadian province of New Brunswick yielded the earliest known plants to have grown wood, approximately 395 to 400 million years ago . Wood can be dated by carbon dating and in some species by dendrochronology to determine when a wooden object was created. People have used wood for thousands of years for many purposes, including as
12528-414: The distinctiveness between seasons is annual (as is the case in equatorial regions, e.g. Singapore ), these growth rings are referred to as annual rings. Where there is little seasonal difference growth rings are likely to be indistinct or absent. If the bark of the tree has been removed in a particular area, the rings will likely be deformed as the plant overgrows the scar. If there are differences within
12672-403: The exact mechanisms determining the formation of earlywood and latewood. Several factors may be involved. In conifers, at least, rate of growth alone does not determine the proportion of the two portions of the ring, for in some cases the wood of slow growth is very hard and heavy, while in others the opposite is true. The quality of the site where the tree grows undoubtedly affects the character of
12816-433: The firmness with which they are held in place. This firmness is affected by, among other factors, the length of time for which the branch was dead while the attaching stem continued to grow. Knots materially affect cracking and warping, ease in working, and cleavability of timber. They are defects which weaken timber and lower its value for structural purposes where strength is an important consideration. The weakening effect
12960-486: The first water-driven sugar mill on Madeira, sugar production increased to over 6,000 arrobas (an arroba was equal to 11 to 12 kilograms or 24 to 26 pounds) by 1455, using advisers from Sicily and financed by Genoese capital (Genoa acted as an integral part of the island economy until the 17th century). The accessibility of Madeira attracted Genoese and Flemish traders, who were keen to bypass Venetian monopolies. "By 1480 Antwerp had some seventy ships engaged in
13104-701: The floor of the Atlantic Ocean, on the Tore underwater mountain range. The volcano formed atop an east–west rift in the oceanic crust along the African Plate , beginning during the Miocene epoch (5 million years ago), continuing into the Pleistocene (700,000 years ago). This was followed by extensive erosion , producing two large amphitheatres opening southward in the central part of
13248-469: The gentry, people of modest conditions and some former inmates of the kingdom . The majority of settlers were fishermen and peasant farmers who willingly left Portugal for a new life on the islands, a better one, they hoped, than was possible in a Portugal which had been ravaged by the Black Death , and where the best farmlands were strictly controlled by the nobility. To have minimum conditions for
13392-505: The grain. In some decorative applications, wood with knots may be desirable to add visual interest. In applications where wood is painted , such as skirting boards, fascia boards, door frames and furniture, resins present in the timber may continue to 'bleed' through to the surface of a knot for months or even years after manufacture and show as a yellow or brownish stain. A knot primer paint or solution (knotting), correctly applied during preparation, may do much to reduce this problem but it
13536-412: The greater the water content, the greater its softening effect. The moisture in wood can be measured by several different moisture meters . Drying produces a decided increase in the strength of wood, particularly in small specimens. An extreme example is the case of a completely dry spruce block 5 cm in section, which will sustain a permanent load four times as great as a green (undried) block of
13680-401: The growing stock of forests worldwide was about 557 billion cubic meters. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 2008, approximately 3.97 billion cubic meters of wood were harvested. Dominant uses were for furniture and building construction. Wood is scientifically studied and researched through
13824-470: The historical autonomic aspirations of the population, the Autonomous Regions of Madeira was established in 1976. Although it is a politico-administrative autonomous region, the Portuguese constitution specifies both a regional and national connection, obliging their administrations to maintain democratic principles and promote regional interests, while reinforcing national unity. As defined by
13968-429: The interior generally inaccessible. Daily life is concentrated in the many villages at the mouths of the ravines, through which the heavy autumn and winter rains travel to the sea. Madeira has many different bioclimates. Based on differences in sun exposure, humidity, and annual mean temperature, clear variations distinguish north- and south-facing regions, as well as some islands. The islands are strongly influenced by
14112-436: The island. Volcanic activity later resumed, producing scoria cones and lava flows atop the eroded shield. The most recent volcanic eruptions were on the west-central part of the island 6,500 years ago, creating more cinder cones and lava flows. It is the largest island of the group with an area of 741 km (286 sq mi), a length of 57 km (35 mi) (from Ponte de São Lourenço to Ponta do Pargo). It
14256-464: The kind of wood. If a tree grows all its life in the open and the conditions of soil and site remain unchanged, it will make its most rapid growth in youth, and gradually decline. The annual rings of growth are for many years quite wide, but later they become narrower and narrower. Since each succeeding ring is laid down on the outside of the wood previously formed, it follows that unless a tree materially increases its production of wood from year to year,
14400-407: The larger vessels or pores (as cross sections of vessels are called) are localized in the part of the growth ring formed in spring, thus forming a region of more or less open and porous tissue. The rest of the ring, produced in summer, is made up of smaller vessels and a much greater proportion of wood fibers. These fibers are the elements which give strength and toughness to wood, while the vessels are
14544-433: The late 14th century. These texts refer to Madeira as Lecmane , Lolegname, Legnami (the isle of wood), Puerto or Porto Santo, deserte or deserta, and desierta . It is widely accepted that knowledge of these Atlantic islands existed before their better-documented discovery and successful settlement by the Kingdom of Portugal . In 1418, two captains, João Gonçalves Zarco and Tristão Vaz Teixeira , while exploring
14688-405: The materials being specified are finished lumber, thus conflating the separate systems and causing confusion. Hardwoods cut for furniture are cut in the fall and winter, after the sap has stopped running in the trees. If hardwoods are cut in the spring or summer the sap ruins the natural color of the lumber and decreases the value of the wood for furniture. Engineered lumber is lumber created by
14832-456: The meat of which was bitter and inedible" before going to the more inhabited Canary Islands , in Spain . This island, possibly Madeira or Hierro , must have been inhabited or previously visited by people for livestock to be present. During the reign of King Edward III of England , lovers Robert Machim and Anna d'Arfet were said to have fled from England to France in 1346. Driven off course by
14976-542: The modern era; a 1st class timber during the Sui was reconstructed as 15×10 (Sui dynasty inches, or 29.4 mm). Defects occurring in lumber are grouped into the following four divisions: During the process of converting timber to commercial forms of lumber the following defects may occur: Fungi attack wood (both timber and lumber) when these conditions are all present: Wood with less than 25% moisture (dry weight basis) can remain free of decay for centuries. Similarly, wood submerged in water may not be attacked by fungi if
15120-480: The moisture content of the air) retains 8–16% of the water in the cell walls, and none, or practically none, in the other forms. Even oven-dried wood retains a small percentage of moisture, but for all except chemical purposes, may be considered absolutely dry. The general effect of the water content upon the wood substance is to render it softer and more pliable. A similar effect occurs in the softening action of water on rawhide, paper, or cloth. Within certain limits,
15264-600: The moneyed aristocracy . As a result of a high demand for the season, there was a need to prepare guides for visitors. The first tourist guide of Madeira appeared in 1850 and focused on elements of history, geology, flora , fauna and customs of the island. Regarding hotel infrastructures, the British and the Germans were the first to launch the Madeiran hotel chain. The historic Belmond Reid's Palace opened in 1891 and
15408-410: The new cells. These cells then go on to form thickened secondary cell walls, composed mainly of cellulose , hemicellulose and lignin . Where the differences between the seasons are distinct, e.g. New Zealand , growth can occur in a discrete annual or seasonal pattern, leading to growth rings ; these can usually be most clearly seen on the end of a log, but are also visible on the other surfaces. If
15552-437: The north, the valleys harbor native trees. These laurissilva forests , notably those on the northern slopes, are designated as a UNESCO World Heritage Site . Madeira's paleobotanical record reveals that laurissilva forest has existed for at least 1.8 million years. Critically endangered species such as the vine Jasminum azoricum and the rowan Sorbus maderensis are endemic. The Madeiran large white butterfly
15696-442: The one before. This method produces the widest possible boards with the least amount of log waste. Lumber manufacturing globally is determined by the preferred style of building; areas with a "wood building culture" (homes were built from wood rather than other materials like brick) are the countries with significant sawmilling industries. Historical wood-frame home building regions are: Europe, North America, Japan. Different areas of
15840-542: The other hand, the latewood is very dense and is deep-colored, presenting a very decided contrast to the soft, straw-colored earlywood. It is not only the proportion of latewood, but also its quality, that counts. In specimens that show a very large proportion of latewood it may be noticeably more porous and weigh considerably less than the latewood in pieces that contain less latewood. One can judge comparative density, and therefore to some extent strength, by visual inspection. No satisfactory explanation can as yet be given for
15984-463: The peaks: Ruivo (1,862 m), Torres (1,851 m), Arieiro (1,818 m), Cidrão (1,802 m), Cedro (1,759 m), Casado (1,725 m), Grande (1,657 m), Ferreiro (1,582 m). At the end of this eruptive phase, reefs encircled the island, its marine vestiges evident in a calcareous layer in the area of Lameiros, in São Vicente. Sea cliffs, such as Cabo Girão , valleys and ravines extend from this central spine, leaving
16128-431: The prevailing climate at the time a tree was cut. Wood, in the strict sense, is yielded by trees , which increase in diameter by the formation, between the existing wood and the inner bark , of new woody layers which envelop the entire stem, living branches, and roots. This process is known as secondary growth ; it is the result of cell division in the vascular cambium , a lateral meristem, and subsequent expansion of
16272-411: The properties of the wood. Certain rot-producing fungi impart to wood characteristic colors which thus become symptomatic of weakness. Ordinary sap-staining is due to fungal growth, but does not necessarily produce a weakening effect. Water occurs in living wood in three locations, namely: In heartwood it occurs only in the first and last forms. Wood that is thoroughly air-dried (in equilibrium with
16416-503: The quality of lumber at different levels and are based on moisture content, size, and manufacture at the time of grading, shipping, and unloading by the buyer. The National Lumber Grades Authority (NLGA) is responsible for writing, interpreting and maintaining Canadian lumber grading rules and standards. The Canadian Lumber Standards Accreditation Board (CLSAB) monitors the quality of Canada's lumber grading and identification system. Their common grade abbrievation, CLS, Canadian Lumber Standard
16560-468: The reverse is commonly true. Otherwise the color of wood is no indication of strength. Abnormal discoloration of wood often denotes a diseased condition, indicating unsoundness. The black check in western hemlock is the result of insect attacks. The reddish-brown streaks so common in hickory and certain other woods are mostly the result of injury by birds. The discoloration is merely an indication of an injury, and in all probability does not of itself affect
16704-665: The right of veto over regional laws, should these laws be unconstitutional. Before the sixth amendment to the Portuguese Constitution passed in 2006, this responsibility was held by a more-powerful Minister of the Republic, who was proposed by the Government and appointed by the President. Madeira is an Outermost Region (OMR) of the European Union , meaning that due to its geographical situation, it
16848-451: The rings must necessarily become thinner as the trunk gets wider. As a tree reaches maturity its crown becomes more open and the annual wood production is lessened, thereby reducing still more the width of the growth rings. In the case of forest-grown trees so much depends upon the competition of the trees in their struggle for light and nourishment that periods of rapid and slow growth may alternate. Some trees, such as southern oaks , maintain
16992-522: The rules of the Sciages Avivés Tropicaux Africains (SATA) and is based on clear cuttings – established by the percentage of the clear surface. In North America, market practices for dimensional lumber made from hardwoods varies significantly from the regularized standardized ' dimension lumber ' sizes used for sales and specification of softwoods – hardwood boards are often sold totally rough cut, or machine planed only on
17136-476: The same genes, but rearranged to give different chromosome numbers: the ancestral species has 40 chromosomes, whereas the Madeira species have from 22 to 30. The deep valleys of Madeira are separated by high ground, and the different species of mice do not encounter each other. A levada is an irrigation channel or aqueduct specific to the Portuguese Atlantic region of Madeira. Madeira island
17280-453: The same size will. The greatest strength increase due to drying is in the ultimate crushing strength, and strength at elastic limit in endwise compression; these are followed by the modulus of rupture, and stress at elastic limit in cross-bending, while the modulus of elasticity is least affected. Wood is a heterogeneous , hygroscopic , cellular and anisotropic (or more specifically, orthotropic ) material. It consists of cells, and
17424-409: The same width of ring for hundreds of years. On the whole, as a tree gets larger in diameter the width of the growth rings decreases. As a tree grows, lower branches often die, and their bases may become overgrown and enclosed by subsequent layers of trunk wood, forming a type of imperfection known as a knot. The dead branch may not be attached to the trunk wood except at its base and can drop out after
17568-438: The second half of the fifteenth century, the city of Funchal became a mandatory port of call for European trade routes. Slaves were used during the island's period of sugar trade to cultivate sugar cane alongside paid workers, though slave owners were only a small minority of the Madeiran population, and those who did own slaves owned only a few. Slaves consisted of Guanches from the nearby Canary islands, captured Berbers from
17712-780: The separate archipelago of the Savage Islands . Roughly half of the population lives in Funchal. The region has political and administrative autonomy through the Administrative Political Statute of the Autonomous Region of Madeira provided for in the Portuguese Constitution . The region is an integral part of the European Union as an outermost region . Madeira generally has a mild/moderate subtropical climate with mediterranean summer droughts and winter rain. Many microclimates are found at different elevations. Madeira, uninhabited at
17856-400: The settlers' main means of subsistence. Grain production began to fall and the ensuing crisis forced Henry the Navigator to order other commercial crops to be planted so that the islands could be profitable. These specialised plants, and their associated industrial technology, created one of the major revolutions on the islands and fuelled Portuguese industry. Following the introduction of
18000-469: The ships, U-38 bombarded Funchal for two hours from a range of about 3 kilometres (2 mi). Batteries on Madeira returned fire and eventually forced U-38 to withdraw. On 12 December 1917, two German U-boats, SM U-156 and SM U-157 (captained by Max Valentiner ), again bombarded Funchal. This time the attack lasted around 30 minutes. The U-boats fired 40 120 and 150 mm (4.7 and 5.9 in) shells. There were three fatalities and 17 wounded;
18144-541: The so-called ‘Wine Culture’, which acquired international fame and provided the rise of a new social class, the Bourgeoisie . With the increase of commercial treaties with England, important English merchants settled on the Island and, ultimately, controlled the increasingly important island wine trade. The English traders settled in the Funchal as of the seventeenth century, consolidating the markets from North America,
18288-459: The term timber is used in both senses. (In the UK, the word lumber is rarely used in relation to wood and has several other meanings.) Re-manufactured lumber is the result of secondary or tertiary processing of previously milled lumber. Specifically, it refers to lumber cut for industrial or wood-packaging use. Lumber is cut by ripsaw or resaw to create dimensions that are not usually processed by
18432-432: The thickness of rough sawn hardwood lumber. In rough-sawn lumber it immediately clarifies that the lumber is not yet milled, avoiding confusion with milled dimension lumber which is measured as actual thickness after machining. Examples – 3 ⁄ 4 -inch, 19 mm, or 1x. In recent years architects, designers, and builders have begun to use the "quarter" system in specifications as a vogue of insider knowledge, though
18576-477: The timber (cedar and yew) was shipped to Portugal and Spain. About 1427, the first sawmill in Germany was built. Cornelis Corneliszoon (or Krelis Lootjes) was a Dutch windmill owner from Uitgeest who invented the first mechanical sawmill, which was wind-powered, on 15 December 1593. This made the conversion of log timber into planks 30 times faster than previously. The circular saw, as used in modern sawmills,
18720-487: The time, was claimed by Portuguese sailors in the service of Prince Henry the Navigator in 1419 and settled after 1420. The archipelago is the first territorial discovery of the exploratory period of the Age of Discovery . Madeira is a year-round resort, particularly for Portuguese, but also British (148,000 visits in 2021), and Germans (113,000). It is by far the most populous and densely populated Portuguese island. The region
18864-411: The tree has been sawn into boards. Knots affect the technical properties of the wood, usually reducing tension strength, but may be exploited for visual effect. In a longitudinally sawn plank, a knot will appear as a roughly circular "solid" (usually darker) piece of wood around which the grain of the rest of the wood "flows" (parts and rejoins). Within a knot, the direction of the wood (grain direction)
19008-430: The tree, may well be stronger than a piece of heartwood from the same tree. Different pieces of wood cut from a large tree may differ decidedly, particularly if the tree is big and mature. In some trees, the wood laid on late in the life of a tree is softer, lighter, weaker, and more even textured than that produced earlier, but in other trees, the reverse applies. This may or may not correspond to heartwood and sapwood. In
19152-445: The tree. This is evidenced by the fact that a tree can thrive with its heart completely decayed. Some species begin to form heartwood very early in life, so having only a thin layer of live sapwood, while in others the change comes slowly. Thin sapwood is characteristic of such species as chestnut , black locust , mulberry , osage-orange , and sassafras , while in maple , ash , hickory , hackberry , beech , and pine, thick sapwood
19296-416: The trunk of a tree than near the base, because the age and the diameter of the upper sections are less. When a tree is very young it is covered with limbs almost, if not entirely, to the ground, but as it grows older some or all of them will eventually die and are either broken off or fall off. Subsequent growth of wood may completely conceal the stubs which will remain as knots. No matter how smooth and clear
19440-404: The trunks of trees were split with wedges into as many and as thin pieces as possible. If it was necessary to have them still thinner, they were hewn, by some sharp instrument, on both sides, to the proper size. This simple but wasteful manner of making boards is still continued in some places. Otherwise, logs were sawn using a two-person whipsaw, or pit-saw, using saddleblocks to hold the log, and
19584-453: The two (broader) face sides. When hardwood boards are also supplied with planed faces, it is usually both by random widths of a specified thickness (normally matching milling of softwood dimensional lumber) and somewhat random lengths. But besides those older (traditional and normal) situations, in recent years some product lines have been widened to also market boards in standard stock sizes; these usually retail in big-box stores and using only
19728-418: The wood formed, though it is not possible to formulate a rule governing it. In general, where strength or ease of working is essential, woods of moderate to slow growth should be chosen. In ring-porous woods, each season's growth is always well defined, because the large pores formed early in the season abut on the denser tissue of the year before. In the case of the ring-porous hardwoods, there seems to exist
19872-535: The world (mainly the United States and Canada) the term timber refers specifically to unprocessed wood fiber , such as cut logs or standing trees that have yet to be cut. Lumber may be supplied either rough- sawn , or surfaced on one or more of its faces. Rough lumber is the raw material for furniture-making, and manufacture of other items requiring cutting and shaping. It is available in many species, including hardwoods and softwoods , such as white pine and red pine , because of their low cost. Finished lumber
20016-416: The world are recognized as significant timber suppliers; however, these areas (Indonesia, Sarawak, New Guinea, etc.) are exporters of raw logs and do not have a significant domestic lumber producing industry. The largest lumber manufacturing regions in the world are: China (18%); United States (17%); Canada (10%); Russia (9%); Germany (5%); Sweden (4%). In early periods of society, to make wood for building,
20160-525: Was 13 ⁄ 16 in (21 mm). In 1928, that was reduced by 4%, and yet again by 4% in 1956. In 1961, at a meeting in Scottsdale, Arizona, the Committee on Grade Simplification and Standardization agreed to what is now the current U.S. standard: in part, the dressed size of a 1-inch (nominal) board was fixed at 3 ⁄ 4 inch; while the dressed size of 2 inch (nominal) lumber
20304-515: Was reduced from 1 + 5 ⁄ 8 inch to the current 1 + 1 ⁄ 2 inch. Dimensional lumber is available in green, unfinished state, and for that kind of lumber, the nominal dimensions are the actual dimensions. Individual pieces of lumber exhibit a wide range in quality and appearance with respect to knots, slope of grain, shakes and other natural characteristics. Therefore, they vary considerably in strength, utility, and value. The move to set national standards for lumber in
20448-482: Was an endemic subspecies of the large white that inhabited the laurissilva forests but has not been seen since 1977. Hogna ingens , the Deserta Grande wolf spider, is endemic to the Madeira archipelago, specifically Deserta Grande Island . It is critically endangered. It is considered the largest member of its family . Restoration efforts are underway. Three species of birds are endemic to Madeira:
20592-637: Was built at the Falls of Piscatauqua , on the line between the Province of Maine and the Province of New Hampshire , in 1634. Unauthenticated records, however, claim that as early as 1633 several mills were operating in New Netherland . The American colonies were essential to England in the role of supplier of lumber for the British fleet. By the 1790s, New England was exporting 36 million feet of pine boards and at least 300 ship masts per year to
20736-539: Was invented by an Englishman named Miller in 1777. It was not until the nineteenth century, however, that it was generally applied, and its great work belongs to that period. The first insertable teeth for this saw were invented by W. Kendal, an American, in 1826. Logging in the American colonies began in 1607 when the Jamestown settlers cut timber to build the first settlement in the new world. America's first sawmill
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