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Sampoong Department Store Collapse
On June 29, 1995, the Sampoong Department Store (; Hanja: 三豐百貨店) in Seocho District, Seoul, South Korea collapsed due to a Structural integrity and failure, structural failure. The collapse killed 502 people and injured 937, making it the largest List of man-made disasters in South Korea, peacetime disaster in South Korean history. It was the deadliest non-deliberate modern Structural integrity and failure, building collapse until the Rana Plaza collapse, 2013 Rana Plaza factory collapse in Bangladesh. Construction on the store began in 1987 and was completed in 1990. The company initially contracted to build the structure withdrew after the chairman of Sampoong Group's construction division, Lee Joon, demanded changes to the concrete Structural support, support columns that introduced structural concerns. Lee Joon ultimately used his own company to complete construction. Investigators blamed the collapse primarily on the column specifications which were incorrect for a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korea Standard Time
South Korea has one time zone, Korea Standard Time (UTC+09:00, UTC+9), which is abbreviated KST. South Korea currently does not observe daylight saving time. From May 8 to October 9 in 1988, daylight saving time was tested to better accommodate the calendar of competitions held during the 1988 Summer Olympics in Seoul. History In 1434, inventor Jang Yeong-sil developed Korea's first automatic water clock, which Sejong the Great, King Sejong adapted as Korea's standard timekeeper. It is likely that Koreans used water clocks to keep time prior to this invention, but no concrete records of them exist. In 1437, Jang Yeong-sil, with Jeong Cho, created a bowl-shaped sundial called the ''angbu ilgu'' (), which King Sejong had placed in public so anyone could use it. In 1908, the Korean Empire adopted a standard time, GMT+08:30. In 1912, during the Korea under Japanese rule, Japanese occupation of Korea, the Governor-General of Korea changed standard time to GMT+09:00 to align with Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seoul Capital Area
The Seoul Metropolitan Area (Sudogwon; , ) or Gyeonggi (region), Gyeonggi region (), is the metropolitan area of Seoul, Incheon, and Gyeonggi Province, located in north-western South Korea. Its population of 26 million (as of 2024) is ranked as the List of largest cities#List, fourth-largest metropolitan area in the world. Its area is about . It forms the cultural, commercial, financial, industrial, and residential center of South Korea. The largest city is Seoul, with a population of approximately 10 million people, followed by Incheon, with three million inhabitants. Geography and climate The Metropolitan Area occupies a plain in the Han River (Korea), Han River valley. History Demographics Covering only about 12% of the country's area, the Seoul Metropolitan Area is home to more than 48.2% of the national population, and is the world's List of largest cities#List, ninth-largest urban area. This percentage has risen steadily since the mid-20th century, and the tre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactured material in the world. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that can be poured and molded into shape. The cement reacts with the water through a process called hydration, which hardens it after several hours to form a solid matrix that binds the materials together into a durable stone-like material with various uses. This time allows concrete to not only be cast in forms, but also to have a variety of tooled processes performed. The hydration process is exothermic, which means that ambient temperature plays a significant role in how long it takes concrete to set. Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ondol
(; , ; ) or ''gudeul'' (; ) in Korean traditional architecture is underfloor heating that uses direct heat transfer from wood smoke to heat the underside of a thick masonry floor. In modern usage, it refers to any type of underfloor heating, or to a hotel or a sleeping room in Korean (as opposed to Western) style. The main components of the traditional ondol are an '' agungi'' (; ), a '' firebox'' or '' stove'', accessible from an adjoining room (typically kitchen or master bedroom), a raised masonry floor underlain by horizontal smoke passages, and a vertical, freestanding chimney on the opposite exterior wall providing a draft. The heated floor, supported by stone piers or baffles to distribute the smoke, is covered by stone slabs, clay and an impervious layer such as oiled paper. History Origin Use of the has been found at archaeological sites in present-day North Korea. A Neolithic Age archaeological site, ''circa'' 5000 BC, discovered in Sonbong, Rason, in present-day ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Structural Load
A structural load or structural action is a mechanical load (more generally a force) applied to Structural engineering#Structural elements, structural elements. A load causes stress (physics), stress, deformation (engineering), deformation, displacement (vector), displacement or acceleration in a structure. Structural analysis, a discipline in engineering, analyzes the effects of loads on structures and structural elements. Excess load may cause structural failure, so this should be considered and controlled during the design of a structure. Particular mechanical structures—such as aircraft, satellites, rockets, space stations, ships, and submarines—are subject to their own particular structural loads and actions. Engineers often evaluate structural loads based upon published regulations, contracts, or specifications. Accepted technical standards are used for acceptance testing and inspection. Types In civil engineering, specified loads are the best estimate of the actual l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossbeam
A beam is a structural element that primarily resists loads applied laterally across the beam's axis (an element designed to carry a load pushing parallel to its axis would be a strut or column). Its mode of deflection is primarily by bending, as loads produce reaction forces at the beam's support points and internal bending moments, shear, stresses, strains, and deflections. Beams are characterized by their manner of support, profile (shape of cross-section), equilibrium conditions, length, and material. Beams are traditionally descriptions of building or civil engineering structural elements, where the beams are horizontal and carry vertical loads. However, any structure may contain beams, such as automobile frames, aircraft components, machine frames, and other mechanical or structural systems. Any structural element, in any orientation, that primarily resists loads applied laterally across the element's axis is a beam. Overview Historically a beam is a squared timber ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete Slab
A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Steel- reinforced slabs, typically between 100 and 500 mm thick, are most often used to construct floors and ceilings, while thinner ''mud slabs'' may be used for exterior paving . In many domestic and industrial buildings, a thick concrete slab supported on foundations or directly on the subsoil, is used to construct the ground floor. These slabs are generally classified as ''ground-bearing'' or ''suspended''. A slab is ground-bearing if it rests directly on the foundation, otherwise the slab is suspended. For multi-story buildings, there are several common slab designs : * Beam and block, also referred to as ''rib and block'', is mostly used in residential and industrial applications. This slab type is made up of pre-stressed beams and hollow blocks and are temporarily propped until set, typically after 21 days. * A hollow core slab which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atrium (architecture)
In architecture, an atrium (: atria or atriums) is a large open-air or skylight-covered space surrounded by a building. Atria were a common feature in Ancient Roman dwellings, providing light and ventilation to the interior. Modern atria, as developed in the late 19th and 20th centuries, are often several stories high, with a glazed roof or large windows, and often located immediately beyond a building's main entrance doors (in the lobby). Atria are a popular design feature because they give their buildings a "feeling of space and light." The atrium has become a key feature of many buildings in recent years. Atria are popular with building users, building designers and building developers. Users like atria because they create a dynamic and stimulating interior that provides shelter from the external environment while maintaining a visual link with that environment. Designers enjoy the opportunity to create new types of spaces in buildings, and developers see atria as prestigi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Food Court
A food court (in Asia-Pacific also called food hall or hawker centre) is generally an indoor plaza or common area within a facility that is contiguous with the counters of multiple food Vendor, vendors and provides a common area for self-serve dinner. It can also be a public dining area in front of a cafe or diner. Food courts may be found in shopping malls, airports, and parks. In various regions (such as Asia, the Americas, and Africa), a food court may be a standalone development. In some places of learning such as high schools and universities, food courts have also come to replace or complement traditional cafeterias. Typical usage Food courts consist of a number of vendors at food stalls or service counters. Meals are ordered at one of the vendors and then carried to a common dining area, often using a common food tray standardized across all the court's vendors. The food may also be ordered as takeout for consumption at another location, such as a home or workplace. In t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roller Rink
A roller rink is a hard surface usually consisting of hardwood or concrete, used for roller skating or inline skating. This includes roller hockey, speed skating, roller derby, and individual recreational skating. Roller rinks can be located in an indoor or outdoor facility. Most skating center facilities range anywhere from under to more than . History Massachusetts businessman James Plimpton's 1863 invention of an improved roller skate led to a boom in popularity in the late 19th century, particularly in cities of the American East Coast. At first, people roller skated at home, but within twenty years businesses dedicated to the activity began to spring up. Plimpton himself is credited with opening the first roller skating rink in New York City. Patrons who enjoyed ice skating during the winter months participated in the similar activity, now year-round. Early roller rinks varied greatly in size and type, both indoor and outdoor. Many consisted of simple wooden platforms tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Escalator
An escalator is a moving staircase which carries people between floors of a building or structure. It consists of a Electric motor, motor-driven chain of individually linked steps on a track which cycle on a pair of tracks which keep the step tread horizontal. Escalators are often used around the world in places where elevator, lifts would be impractical, or they can be used in conjunction with them. Principal areas of usage include department stores, shopping malls, airports, list of transit systems, transit systems (railway/railroad stations), convention centers, hotels, arenas, stadiums and public buildings. Escalators have the capacity to move large numbers of people. They have no waiting interval (except during very heavy traffic). They can be used to guide people toward main exits or special exhibits and may be weatherproofed for outdoor use. A non-functional escalator can function as a normal staircase, whereas many other methods of transport become useless when they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Department Store
A department store is a retail establishment offering a wide range of consumer goods in different areas of the store under one roof, each area ("department") specializing in a product category. In modern major cities, the department store made a dramatic appearance in the middle of the 19th century, and permanently reshaped shopping habits, and the definition of service and luxury. Similar developments were under way in London (with Whiteleys), in Paris () and in New York City ( Stewart's). Today, departments often include the following: clothing, cosmetics, do it yourself, furniture, gardening, hardware, home appliances, houseware, paint, sporting goods, toiletries, and toys. Additionally, other lines of products such as food, books, jewellery, electronics, stationery, photographic equipment, baby products, and products for pets are sometimes included. Customers generally check out near the front of the store in discount department stores, while high-end traditional d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
