A sawmill ( saw mill , saw-mill ) or lumber mill is a facility where logs are cut into lumber . Modern sawmills use a motorized saw to cut logs lengthwise to make long pieces, and crosswise to length depending on standard or custom sizes ( dimensional lumber ). The "portable" sawmill is simple to operate. The log lies flat on a steel bed, and the motorized saw cuts the log horizontally along the length of the bed, by the operator manually pushing the saw. The most basic kind of sawmill consists of a chainsaw and a customized jig ("Alaskan sawmill"), with similar horizontal operation.
37-479: Before the invention of the sawmill, boards were made in various manual ways, either rived (split) and planed , hewn , or more often hand sawn by two men with a whipsaw , one above and another in a saw pit below. The earliest known mechanical mill is the Hierapolis sawmill , a Roman water-powered stone mill at Hierapolis , Asia Minor dating back to the 3rd century AD. Other water-powered mills followed and by
74-561: A cheaper and in some use cases more robust alternative to plywood for paneling. Some automatic mills can process 800 small logs into bark chips, wood chips, sawdust and sorted, stacked, and bound planks, in an hour. Manual labour Manual labour (in Commonwealth English , manual labor in American English ) or manual work is physical work done by humans, in contrast to labour by machines and working animals . It
111-484: A large pit or constructed a sturdy platform, enabling a two-man crew to saw, one positioned below the log called the pit-man, the other standing on top called the top-man. The saw blade teeth were angled and sharpened as a rip saw so as to only cut on the downward stroke. On the return stroke, the burden of lifting the weight of the saw was shared equally by the two sawyers, thereby reducing fatigue and backache. The pitman had to contend with sawdust in his mouth and eyes and
148-399: A straight, stiff blade without a frame, up to 14 feet long and with a handle at each end. The upper handle was called the tiller and the lower one the box, so called from its appearance and because it could be removed when the saw was taken out of one cut to be positioned in another. The whipsaw was used close to the felling site to reduce large logs to beams and planks. Sawyers either dug
185-538: A working sawmill comes from a Roman poet, Ausonius , who wrote a topographical poem about the river Moselle in Germany in the late 4th century AD. At one point in the poem, he describes the shrieking sound of a watermill cutting marble . Marble sawmills also seem to be indicated by the Christian saint Gregory of Nyssa from Anatolia around 370–390 AD, demonstrating a diversified use of water-power in many parts of
222-418: Is a partial but significant correlation between manual labour and unskilled or semiskilled workers. Based on economic and social conflict of interest , people may often distort that partial correlation into an exaggeration that equates manual labour with lack of skill; with lack of any potential to apply skill (to a task) or to develop skill (in a worker); and with low social class . Throughout human existence
259-413: Is a strong correlation between manual labour and unskilled or semiskilled workers, despite the fact that nearly any work can potentially have skill and intelligence applied to it (for example, the artisanal skill of craft production , or the logic of applied science ). It has always been the case for humans that many workers begin their working lives lacking any special level of skill or experience. (In
296-505: Is an oversimplification, highlighting it as a reason many socialist economic policies face challenges, particularly concerning the economic calculation problem. On the other hand, Paul Cockshott and Allin Cottrell advocate for considering all labor as simple labor, emphasizing the importance of accounting for training in more complex forms of labor. This complexity extends to determining what constitutes unskilled labor, as it raises questions about
333-459: Is most literally work done with the hands (the word manual coming from the Latin word for hand ) and, by figurative extension, it is work done with any of the muscles and bones of the human body . For most of human prehistory and history, manual labour and its close cousin, animal labour , have been the primary ways that physical work has been accomplished. Mechanisation and automation , which reduce
370-525: Is the small portable sawmill for personal or even professional use. Many different models have emerged with different designs and functions. They are especially suitable for producing limited volumes of boards, or specialty milling such as oversized timber. Portable sawmills have gained popularity for the convenience of bringing the sawmill to the logs and milling lumber in remote locations. Some remote communities that have experienced natural disasters have used portable sawmills to rebuild their communities out of
407-456: The Greeks , Hindus , English , and Americans all created sophisticated social structures to outsource manual labour to distinct classes, castes , ethnicities , or races . Whipsaw A whipsaw or pitsaw was originally a type of saw used in a saw pit , and consisted of a narrow blade held rigid by a frame and called a frame saw or sash saw (see illustrations). This evolved into
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#1732852648613444-687: The Pee Dee River from as far as the edge of the Appalachian Mountains in North Carolina . A restoration project for Sturgeon's Mill in Northern California is underway, restoring one of the last steam-powered lumber mills still using its original equipment. In the twentieth century the introduction of electricity and high technology furthered this process, and now most sawmills are massive and expensive facilities in which most aspects of
481-629: The Roman Empire ), dating to the second half of the 3rd century, is the earliest known sawmill. It also incorporates a crank and connecting rod mechanism. Water-powered stone sawmills working with cranks and connecting rods, but without gear train , are archaeologically attested for the 6th century at the Byzantine cities Gerasa (in Asia Minor) and Ephesus (in Syria ). The earliest literary reference to
518-483: The Roman Empire . Sawmills later became widespread in medieval Europe , as one was sketched by Villard de Honnecourt in c. 1225–1235. They are claimed to have been introduced to Madeira following its discovery in c. 1420 and spread widely in Europe in the 16th century. Prior to the invention of the sawmill, boards were rived (split) and planed, or more often sawn by two men with a whipsaw , using saddleblocks to hold
555-635: The sawfiler . Sawfilers were highly skilled in metalworking. Their main job was to set and sharpen teeth. The craft also involved learning how to hammer a saw, whereby a saw is deformed with a hammer and anvil to counteract the forces of heat and cutting. Modern circular saw blades have replaceable teeth, but still need to be hammered. The introduction of steam power in the 19th century created many new possibilities for mills. Availability of railroad transportation for logs and lumber encouraged building of rail mills away from navigable water. Steam powered sawmills could be far more mechanized. Scrap lumber from
592-403: The whipsaw to mechanical power, generally driven by a water wheel to speed up the process. The circular motion of the wheel was changed to back-and-forth motion of the saw blade by a connecting rod known as a pitman arm (thus introducing a term used in many mechanical applications). Generally, only the saw was powered, and the logs had to be loaded and moved by hand. An early improvement
629-522: The 11th century they were widespread in Spain and North Africa, the Middle East and Central Asia, and in the next few centuries, spread across Europe. The circular motion of the wheel was converted to a reciprocating motion at the saw blade. Generally, only the saw was powered, and the logs had to be loaded and moved by hand. An early improvement was the development of a movable carriage, also water powered, to move
666-424: The advantages of both man and machine. Although nearly any work can potentially have skill and intelligence applied to it, many jobs that mostly comprise manual labour—such as fruit and vegetable picking, manual materials handling (for example, shelf stocking), manual digging, or manual assembly of parts—often may be done successfully (if not masterfully) by unskilled or semiskilled workers. For these reasons, there
703-579: The availability of ships transporting cargoes of logs to the sawmill and cargoes of lumber from the sawmill. The next improvement was the use of circular saw blades, perhaps invented in England in the late 18th century, but perhaps in 17th-century Netherlands. Soon thereafter, millers used gangsaws, which added additional blades so that a log would be reduced to boards in one quick step. Circular saw blades were extremely expensive and highly subject to damage by overheating or dirty logs. A new kind of technician arose,
740-495: The fallen trees. Technology has changed sawmill operations significantly in recent years, emphasizing increasing profits through waste minimization and increased energy efficiency as well as improving operator safety. The once-ubiquitous rusty, steel conical sawdust burners have for the most part vanished, as the sawdust and other mill waste is now processed into particleboard and related products, or used to heat wood-drying kilns . Co-generation facilities will produce power for
777-411: The forest, where a temporary shelter was built, and the logs were skidded to the nearby mill by horse or ox teams, often when there was some snow to provide lubrication. As mills grew larger, they were usually established in more permanent facilities on a river, and the logs were floated down to them by log drivers . Sawmills built on navigable rivers, lakes, or estuaries were called cargo mills because of
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#1732852648613814-439: The growth of a frontier community. The Dutch windmill owner Cornelis Corneliszoon van Uitgeest invented in 1594 the wind-powered sawmill, which made the conversion of log timber into planks 30 times faster than before. His wind-powered sawmill used a crankshaft to convert a windmill 's circular motion into a back-and-forward motion powering the saw, and was granted a patent for the technique. Early mills had been taken to
851-534: The largest sawmill in the world was operated by the Atlantic Coast Lumber Company in Georgetown, South Carolina, using logs floated down the Pee Dee River from the Appalachian Mountains . In the 20th century the introduction of electricity and high technology furthered this process, and now most sawmills are massive and expensive facilities in which most aspects of the work are computerized. Besides
888-494: The latter has involved a spectrum of variants, from slavery (with stigmatisation of the slaves as 'subhuman'), to caste or caste-like systems, to subtler forms of inequality. There are diverse viewpoints regarding the definition of manual labor, and the progression from manual labor to more complex forms can be ambiguous. Authors such as Marx characterize it as simple labor, controversially proposing that all labor can be categorized as such. However, Ludwig von Mises argues that this
925-538: The log steadily through the saw blade. By the time of the Industrial Revolution in the 18th century, the circular saw blade had been invented, and with the development of steam power in the 19th century, a much greater degree of mechanisation was possible. Scrap lumber from the mill provided a source of fuel for firing the boiler. The arrival of railroads meant that logs could be transported to mills rather than mills being built beside navigable waterways. By 1900,
962-408: The log, and a saw pit for the pitman who worked below. Sawing was slow, and required strong and hearty men. The topsawer had to be the stronger of the two because the saw was pulled in turn by each man, and the lower had the advantage of gravity. The topsawyer also had to guide the saw so that the board was of even thickness. This was often done by following a chalkline. Early sawmills simply adapted
999-533: The mill provided a ready fuel source for firing the boiler. Efficiency was increased, but the capital cost of a new mill increased dramatically as well. In addition, the use of steam or gasoline-powered traction engines also allowed the entire sawmill to be mobile. By 1900, the largest sawmill in the world was operated by the Atlantic Lumber Company in Georgetown , South Carolina, using logs floated down
1036-493: The nature of labor performed by students when training for specific professions. Ultimately, definitions of manual labor are shaped by economic and political interests, as all societies depend on some form of manual labor for their functioning. Economic competition often results in businesses trying to buy labour at the lowest possible cost (for example, through offshoring or by employing foreign workers ) or to obviate it entirely (through mechanisation and automation). There
1073-502: The need for human and animal labour in production, have existed for centuries, but it was only starting in the 18th and 19th centuries that they began to significantly expand and to change human culture. To be implemented, they require that sufficient technology exist and that its capital costs be justified by the amount of future wages that they will obviate . Semi-automation is an alternative to worker displacement that combines human labour, automation, and computerisation to leverage
1110-478: The operation and may also feed superfluous energy onto the grid. While the bark may be ground for landscaping barkdust , it may also be burned for heat. Sawdust may make particle board or be pressed into wood pellets for pellet stoves. The larger pieces of wood that will not make lumber are chipped into wood chips and provide a source of supply for paper mills. Wood by-products of the mills will also make oriented strand board (OSB) paneling for building construction,
1147-471: The past two centuries, education has become more important and more widely disseminated; but even today, not everyone can know everything, or have experience in a great number of occupations.) It has also always been the case that there was a large amount of manual labour to be done; and that much of it was simple enough to be successfully (if not masterfully) done by unskilled or semiskilled workers, which has meant that there have always been plenty of people with
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1184-446: The potential to do it. These conditions have assured the correlation's strength and persistence. Throughout human prehistory and history, wherever social class systems have developed, the social status of manual labourers has, more often than not, been low, as most physical tasks were done by peasants , serfs , slaves , indentured servants , wage slaves , or domestic servants . For example, legal scholar L. Ali Khan analyses how
1221-450: The saw blade is in the topmost position it drops by its own weight, making a loud knocking noise, and in so doing it cuts the trunk. A small mill such as this would be the center of many rural communities in wood-exporting regions such as the Baltic countries and Canada . The output of such mills would be quite low, perhaps only 500 boards per day. They would also generally only operate during
1258-436: The sawn timber, use is made of all the by-products including sawdust , bark , woodchips , and wood pellets , creating a diverse offering of forest products . A sawmill's basic operation is much like those of hundreds of years ago: a log enters on one end and dimensional lumber exits on the other end. The Hierapolis sawmill , a water-powered stone sawmill at Hierapolis , Asia Minor (modern-day Turkey , then part of
1295-579: The winter, the peak logging season. In the United States , the sawmill was introduced soon after the colonisation of Virginia by recruiting skilled men from Hamburg . Later the metal parts were obtained from the Netherlands, where the technology was far ahead of that in England , where the sawmill remained largely unknown until the late 18th century. The arrival of a sawmill was a large and stimulative step in
1332-440: The work is computerized . The cost of a new facility with 4,700-cubic-metre-per-day (2-million- board-foot -per- day ) capacity is up to CAN$ 120,000,000. A modern operation will produce between 240,000 to 1,650,000 cubic metres (100 to 700 million board feet) annually. Small gasoline-powered sawmills run by local entrepreneurs served many communities in the early twentieth century, and specialty markets still today. A trend
1369-409: Was the development of a movable carriage, also water powered, to move the log steadily through the saw blade. A type of sawmill without a crank is known from Germany called "knock and drop" or simply "drop" -mills. In these drop sawmills, the frame carrying the saw blade is knocked upwards by cams as the shaft turns. These cams are let into the shaft on which the waterwheel sits. When the frame carrying
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