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Wood Splitting
Wood splitting (''riving'',"Riving" def. 1.b. ''Oxford English Dictionary'' Second Edition on CD-ROM (v. 4.0) Oxford University Press 2009 cleaving) is an ancient technique used in carpentry to make lumber for making wooden objects, some basket weaving, and to make firewood. Unlike sawmill, wood sawing, the wood is split along the Wood grain, grain using tools such as a hammer and Wedge (mechanical device), wedges, splitting maul, cleaving axe, side knife, or froe. Woodworking In woodworking carpenters use a wooden siding which gets its name, clapboard, from originally being split from logs—the sound of the plank against the log being a clap. This is used in Clapboard (architecture), clapboard architecture and for Panelling#Wainscot_panelling, wainscoting. Coopers use oak clapboards to make barrel staves. Split-rail fences are made with split wood. Basket making Some Native Americans traditionally make baskets from Fraxinus nigra, black ash by pounding the wood with a mallet a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merlin Usteye Bokion
The Multi-Element Radio Linked Interferometer Network (MERLIN) is an interferometer array of radio telescopes spread across England. The array is run from Jodrell Bank Observatory in Cheshire by the University of Manchester on behalf of UK Research and Innovation. The array consists of up to seven radio telescopes and includes the Lovell Telescope at Jodrell Bank, Mark II (radio telescope), Mark II, Cambridge, Defford in Worcestershire, Knockin in Shropshire, and Darnhall and Pickmere (previously known as Tabley) in Cheshire. The longest baseline is therefore 217 km and MERLIN can operate at Frequency, frequencies between 151 Hertz, MHz and 24 Hertz, GHz. At a wavelength of 6 cm (5 GHz frequency), MERLIN has a resolution of 40 arcsecond, milliarcseconds which is comparable to that of the Hubble Space Telescope, HST at optical wavelengths. Some of the telescopes are occasionally used for European VLBI Network (EVN) and Very Long Baseline Interferometry (V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Split-rail Fence
A split-rail fence, log fence, or buck-and-rail fence (also historically known as a Virginia, zigzag, worm, snake or snake-rail fence due to its meandering layout) is a type of fence constructed in the United States and Canada, and is made out of timber logs, usually split lengthwise into ''rails'' and typically used for agricultural or decorative fencing. Such fences require much more timber than other types of fences, and so are generally only common in areas where wood is abundant. They are simple in their construction, and can be assembled with few tools even on hard or rocky ground. They also can be built without using any nails or other hardware; such hardware was often scarce in frontier areas. They are popular in very rocky areas where post hole digging is difficult. They can be partially or wholly disassembled if the fence needs to be moved or the wood becomes more useful for other purposes. Although the origin of split-rail fence use in colonial America is not full ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Hole
In construction, a pilot hole is a small hole Drilling, drilled into a piece of construction material. Its purpose may be: # to guide a larger drill to the appropriate location and ease the job of the larger drill, # allow the insertion of another hole-making tool, such as a knockout punch, that will produce the final-sized hole, or # locate, guide, and provide clearance for a Self-tapping screw, self-threading screw in wood or plastic to prevent damaging the material or breaking the screw. Pilot for large holes A pilot hole may be drilled the full extent of the final hole, or may only be a portion of the final depth. The pilot drill may be a standard twist drill, another type of drill bit appropriate for the material, or, when the primary purpose is precisely locating a hole, may be made with a short, stiff center drill. The pilot hole also reduces the power needed to turn a large drill bit, and reduces the large bit breakage risk. For twist drill bits, the pilot size is usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truss Connector Plate
A truss connector plate, or gang plate, is a kind of tie. Truss plates are light gauge metal plates used to connect prefabricated light frame wood trusses. They are produced by punching light gauge galvanized steel to create teeth on one side. The teeth are embedded in and hold the wooden frame components to the plate and each other. Nail plates are used to connect timber of the same thickness in the same plane. When used on trusses, they are pressed into the side of the timber using tools such as a hydraulic press or a roller. As the plate is pressed in, the teeth are all driven into the wood fibers simultaneously, and the compression between adjacent teeth reduces the tendency of the wood to split. A truss connector plate is manufactured from ASTM A653/A653M, A591, A792/A792M, or A167 structural quality steel and is protected with zinc or zinc-aluminum alloy coatings or their stainless steel Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Butterfly Joint
A butterfly joint, also called a bow tie, dovetail key, Dutchman joint, or Nakashima joint, is a type of joint or inlay used to hold two or more pieces of wood together. These types of joints are mainly used for aesthetics, but they can also be used to reinforce cracks in pieces of wood, doors, picture frames, or drawers. A dovetail key resembles two dovetails connected at the narrow part. A negative of the hole is cut out of the board the butterfly will be placed in and the butterfly is then fitted, keeping the joint together. The wood used for the butterfly is usually a contrasting wood, often walnut. History Dutchman Joint The term Dutchman is used when a patch or inlay covers a miss-cut or an imperfect piece of wood. A Dutchman can also cover a knot in the wood. A Dutchman can be wood or metal. The name originated in San Francisco after the gold rush, when all types of European craftsmen came to California to earn a living. The term Dutchman is slang given to the woodwor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treenail
A treenail, also trenail, trennel, or trunnel, is a wooden peg, pin, or dowel used to fasten pieces of wood together, especially in timber frames, covered bridges, wooden shipbuilding and boat building. It is driven into a hole bored through two (or more) pieces of structural wood (mortise and tenon). History and general use The use of wood as a tenon can be traced back over 7,000 years, as archaeologist have found traces of wood nails in the excavation of early Germanic sites. Treenails are extremely economical and readily available, making them a common early building material. Black locust is a favorite wood when making treenails in shipbuilding in North America and English oak in Europe due to their strength and rot resistance, while red oak is typical in buildings. Traditionally treenails and pegs were made by splitting bolts of wood with a froe and shaping them with a drawknife on a shaving horse. They can also be made with a tine-former, a hollow metal tube with a f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shake (shingle)
Wood shingles are thin, tapered pieces of wood primarily used to cover roof shingle, roofs and walls of buildings to protect them from the weather. Historically roof shingle, shingles, also known as shakes, were split from straight grained, knot free ''bolts'' of wood. Today shingles are mostly made by being cut which distinguishes them from shakes, which are made by being split out of a bolt. Wooden shingle roofs were prevalent in the North American colonies (for example in the Cape Cod (house), Cape-Cod-style house), while in central and southern Europe at the same time, thatch, slate and tile were the prevalent roofing materials. In rural Scandinavia, wood shingles were a common roofing material until the 1950s. Wood shingles are susceptible to fire and cost more than other types of shingle so they are not as common today as in the past. Distinctive shingle patterns exist in various regions created by the size, shape, and application method. Special treatments such as swep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viking Ship
Viking ships were marine vessels of unique structure, used in Scandinavia throughout the Middle Ages. The boat-types were quite varied, depending on what the ship was intended for, but they were generally characterized as being slender and flexible boats, with symmetrical ends with true keel. They were Clinker (boat building), clinker built, which is the overlapping of planks riveted together. Some might have had a dragon's head or other circular object protruding from the bow and stern for design, although this is only inferred from historical sources. Viking ships were used both for military purposes and for long-distance trade, exploration and colonization. In the literature, Viking ships are usually seen divided into two broad categories: merchant ships and warships, the latter resembling narrow "war canoes" with less load capacity, but higher speed. However, these categories are overlapping; some transport ships would also form part of war fleets. As a rule, ship lanes in S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batoning
Batoning is the technique of cutting or splitting wood by using a baton-sized stick or mallet to repeatedly strike the spine of a sturdy knife, chisel or blade in order to drive it through wood, similar to how a froe is used. The batoning method can be used to make kindling or desired forms such as boards, slats or notches. The practice is most useful for obtaining dry wood from the inside of logs for the purpose of fire making. Tools Tools used in batoning are: a strong, fixed-blade, preferably full tang knife or machete with a thick spine, and a club-sized length of dense or green wood for striking the knife's spine and tip. Technique The basic method involves repeatedly striking the spine of the knife to force the middle of the blade into the wood. The tip is then struck, to continue forcing the blade deeper, until a split is achieved. Uses and advantages This technique is useful for the simple splitting of wood for kindling, to access dry wood within a wet log, and for the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Log Splitter
A log splitter is a piece of machinery or equipment used for splitting firewood from softwood or hardwood logs that have been pre-cut into sections (rounds), usually by chainsaw or on a saw bench. Many log splitters consist of a hydraulic pump or electric motor which then powers a hydraulic or electrical rod and piston assembly. Generally, these are often rated by the tons of force they can generate. The higher the force rating, the greater the thickness or length of the rounds that can be split. The log splitter consists of all four major hydraulic components. Most log splitter models for home use have a rating of around 10 tons, but professional hydraulic models may exert 30 tons of force or more. There are also manual log splitters, which use mechanical leverage to force logs through a sharpened blade assembly; and screw or 'corkscrew' types that are driven directly from an agricultural tractor's power take-off shaft where the splitter is mounted on the three-point hitch. P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Log Bucking
A crew of log buckers with crosscut saws in 1914. Bucker limbing dead branch stubs with a chainsaw, also known as knot bumping Bucker making a bucking cut with a chainsaw Bucking is the process of cutting a felled and delimbed tree into logs. Significant value can be lost by sub-optimal bucking because logs destined for plywood, lumber, and pulp each have their own value and specifications for length, diameter, and defects. Cutting from the top down is ''overbucking'' and from the bottom up is '' underbucking''. In British English, the process is called logging-up or crosscutting. Methods A felled and delimbed tree is cut into logs of standard sizes, a process called ''bucking''. A logger who specialises in this job is a ''buck sawyer''. Bucking may be done in a variety of ways depending on the logging operation. Trees that have been previously felled and moved to a landing with a log skidder are spread out for processing. While many of the limbs have broken off during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mallet
A mallet is a tool used for imparting force on another object, often made of rubber or sometimes wood, that is smaller than a maul or beetle, and usually has a relatively large head. General overview The term is descriptive of the overall size and proportions of the tool, and not the materials it may be made of, though most mallets have striking faces that are softer than steel. Mallets are used in various industries, such as upholstery work, and a variety of other general purposes. It is a tool of preference for wood workers using chisels with plastic, metal, or wooden handles, as they give a softened strike with a positive drive. * Wooden mallets are usually used in carpentry to knock wooden pieces together, or to drive dowels, chisels and to apply pressure on joints. A wooden mallet will not deform the striking end of a metal tool, as most metal hammers would. It is also used to reduce the force driving the cutting edge of a chisel, giving better control. Hardwo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
