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Charpy test sample with a notch. In mechanical engineering and materials science, a notch refers to a V-shaped, U-shaped, or semi-circular defect deliberately introduced into a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.
A steel fence post, also called (depending on design or country) a T-post, a Y-post, or variants on star post, is a type of fence post or picket. They are made of steel and are sometimes manufactured using durable rail steel. They can be used to support various types of wire or wire mesh.
U.S. patent 147,756 – Isaac Ellwood, DeKalb, Illinois Improvement in Barbed Fences – "single piece of metal with four points, attached to a flat rail" (February, 1874) U.S. patent 157,124 – Joseph Glidden, DeKalb, Illinois, Improvement in Wire-fences – twisted fence wires with short spur coiled around one of the strands (November, 1874 ...
Log fences or split-rail fences were simple fences constructed in newly cleared areas by stacking log rails. Earth could also be used as a fence; an example was what is now called the sunken fence , or "ha-ha," a type of wall built by digging a ditch with one steep side (which animals cannot scale) and one sloped side (where the animals roam).
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A notch weir is any weir where the physical barrier is significantly higher than the water level except for a specific notch (often V-shaped) cut into the panel. At times of normal flow all the water must pass through the notch, simplifying flow volume calculations, and at times of flood the water level can rise and submerge the weir without ...
A single, central post in a roof truss in tension between the rafters and a tie beam (bottom chord), or 2) (U.S.) A short of the tie beam only supporting the rafters via struts. 3) (U.K.) A king post specifically carries a ridge beam otherwise is called a king strut. "King post" was formerly used to describe a crown post in the U. K., but no ...
In 1889, the facility merged with three other steel mills to form a new company called Illinois Steel, which later became part of Federal Steel. [1] By 1901, the company was under the control of US Steel. [1] By 1951, the South Works boasted 11 blast furnaces, 8 electric furnaces, and 12 rolling mills, and employed some 15,000 employees. [2]
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