|
Waffle Slab
A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. The name ''waffle'' comes from the grid pattern created by the reinforcing ribs. Waffle slabs are preferred for spans greater than , as they are much stronger than flat slabs, flat slabs with drop panels, two-way slabs, one-way slabs, and one-way joist slabs. Description A waffle slab is flat on top, while joists create a grid like surface on the bottom. The grid is formed by the removal of molds after the concrete sets. This structure was designed to be more solid when used on longer spans and with heavier loads. This type of structure, because of its rigidity, is recommended for buildings that require minimal vibration, like laboratories and manufacturing facilities. It is also used in buildings that require big open spaces, like theatres or train stations. Waffle slabs are composed by intricate formwork, and may be more expensive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waffle Slab National Theatre Terrace Restaurant
A waffle is a dish made from leavened batter or dough that is cooked between two plates that are patterned to give a characteristic size, shape, and surface impression. There are many variations based on the type of waffle iron and recipe used. Waffles are eaten throughout the world, particularly in Belgium, which has over a dozen regional varieties. Waffles may be made fresh or simply heated after having been commercially cooked and frozen. Etymology The word ''waffle'' first appears in the English language in 1725: "Waffles. Take flower, cream..." It is directly derived from the Dutch , which itself derives from the Middle Dutch . While the Middle Dutch is first attested to at the end of the 13th century, it is preceded by the French in 1185; both from Frankish 'honeycomb' or 'cake'. Other spellings throughout modern and medieval Europe include waffe, wafre, wafer, wâfel, waufre, iauffe, gaufre, goffre, gauffre, wafe, waffel, wåfe, wāfel, wafe, vaffel, and våffl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rib And Slab Width
In vertebrate anatomy, ribs ( la, costae) are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the chest, enabling the lungs to expand and thus facilitate breathing by expanding the chest cavity. They serve to protect the lungs, heart, and other internal organs of the thorax. In some animals, especially snakes, ribs may provide support and protection for the entire body. Human anatomy Rib details Human ribs are flat bones that form part of the rib cage to help protect internal organs. Humans usually have 24 ribs, in 12 pairs. 1 in 500 people have an extra rib known as a cervical rib. All are attached at the back to the thoracic vertebrae and are numbered from 1–12 according to the vertebrae to which they attach. The first rib is attached to thoracic vertebra 1 (T1). At the front of the body, most of the ribs are joined by costal cartilage to the sternum. Ribs connect to vertebrae at the costovertebral joints. The part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete Buildings And Structures
Concrete is a composite material composed of fine and coarse construction aggregate, aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of Environmental impact of concrete, environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread Sand theft, illegal sand mining, impacts on the surrounding environment such as increased surface runoff or Urban heat island, urban heat island effect, and potential publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floors
A floor is the bottom surface of a room or vehicle. Floors vary from simple dirt in a cave to many layered surfaces made with modern technology. Floors may be stone, wood, bamboo, metal or any other material that can support the expected load. The levels of a building are often referred to as floors, although a more proper term is storey. Floors typically consist of a subfloor for support and a floor covering used to give a good walking surface. In modern buildings the subfloor often has electrical wiring, plumbing, and other services built in. As floors must meet many needs, some essential to safety, floors are built to strict building codes in some regions. Special floor structures Where a special floor structure like a floating floor is laid upon another floor, both may be called subfloors. Special floor structures are used for a number of purposes: * Balcony, a platform projecting from a wall * Floating floor, normally for noise or vibration reduction * Glass floo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formwork
Formwork is Molding (process), molds into which concrete or similar materials are either precast concrete, precast or cast-in-place concrete, cast-in-place. In the context of concrete construction, the falsework supports the shuttering molds. In specialty applications formwork may be permanently incorporated into the final structure, adding insulation or helping reinforce the finished structure. Types Formwork may be made of wood, metal, plastic, or composite materials: #''Traditional timber formwork''. The formwork is built on site out of timber and plywood or moisture-resistant particleboard. It is easy to produce but time-consuming for larger structures, and the plywood facing has a relatively short lifespan. It is still used extensively where the labour costs are lower than the costs for procuring reusable formwork. It is also the most flexible type of formwork, so even where other systems are in use, complicated sections may use it. #''Engineered Formwork System''. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinforced Concrete
Reinforced concrete (RC), also called reinforced cement concrete (RCC) and ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars ( rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion. Description Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waffle Slab Foundation
The Wafflemat foundation system, also called a waffle slab foundation, is an above-ground mat foundation used to provide load-bearing capacity on expansive, rocky, compressible, or hydro collapsible soils. The slab is created by placing a series of plastic forms ("Waffleboxes") that are either in height, and in plan, directly on grade to create a waffle-like grid of ribs, and then monolithically pour a post-tensioned reinforced concrete slab over the Waffleboxes. The completed slab then sits on the ground as a 'raft', with the void areas underneath the slab allowing for soil movement. The waffle slab is very stiff, with the cross section providing the needed strength to resist differential swelling resulting from landscaping practices, surface drainage, or flooding from any source. It does not require presoaking underlying soil pads, and there is no need for footings, meaning no earth spoils. And, since the slab section is typically above grade, it typically does not require a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Metro
The Washington Metro (or simply Metro), formally the Metrorail,Google Books search/preview is a rapid transit system serving the Washington metropolitan area of the United States. It is administered by the Washington Metropolitan Area Transit Authority (WMATA), which also operates the Metrobus (Washington, D.C.), Metrobus and Metrorail services under the Metro name. Opened in 1976, the network now includes six lines, 97 stations, and of Network length (transport)#Route length, route. Metro serves Washington, D.C., as well as several jurisdictions in the states of Maryland and Virginia. In Maryland, Metro provides service to Montgomery County, Maryland, Montgomery and Prince George's County, Maryland, Prince George's counties; in Virginia, to Arlington County, Virginia, Arlington, Fairfax C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal National Theatre
The Royal National Theatre in London, commonly known as the National Theatre (NT), is one of the United Kingdom's three most prominent publicly funded performing arts venues, alongside the Royal Shakespeare Company and the Royal Opera House. Internationally, it is known as the National Theatre of Great Britain. Founded by Laurence Olivier in 1963, many well-known actors have performed at the National Theatre. Until 1976, the company was based at The Old Vic theatre in Waterloo. The current building is located next to the Thames in the South Bank area of central London. In addition to performances at the National Theatre building, the National Theatre tours productions at theatres across the United Kingdom. The theatre has transferred numerous productions to Broadway and toured some as far as China, Australia and New Zealand. However, touring productions to European cities was suspended in February 2021 over concerns about uncertainty over work permits, additional costs and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical, Electrical, And Plumbing
Mechanical, electrical and plumbing (MEP) refers to the installation of services which provide a comfortable space for the building occupants. In residential and commercial buildings, these elements are often designed by a specializeMEP engineering firms The part of Mechanical in the overall MEP system is almost 70% of the total work. MEP's design is important for planning, decision-making, accurate documentation, performance- and cost-estimation, construction, and operating/maintaining the resulting facilities. MEP specifically encompasses the in-depth design and selection of these systems, as opposed to a tradesperson simply installing equipment. In countries of Asia such as Pakistan, China and Saudi Arabia the use of MEP is increasing in building construction projects due to extreme climates in summer and winter. For example, a plumber may select and install a commercial hot water system based on common practice and regulatory codes. A team of MEP engineers will research the bes ... [...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 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid Column Head Width
Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma). The molecules in a solid are closely packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface. Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire available volume like a gas. The atoms in a solid are bound to each other, either in a regular geometric lattice (crystalline solids, which include metals and ordinary ice), or irregularly (an amorphous solid such as common window glass). Solids cannot be compressed with little pressure whereas gases can be compressed with little pressure because the molecules in a gas are loosely packed. The branch of physics that deals with solids is called solid-state physics, and is the main branch of condensed matter physics (which also includes liquids). Materials science ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
