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The demand for high office building construction at the turn of the 20th century led to a much greater use of cast and wrought iron, and later, steel and concrete.The use of brick for skyscraper construction severely limited the size of the building – the Monadnock Building, built in 1896 in Chicago, required exceptionally thick walls to maintain the structural integrity of its 17 storeys.A brick can be composed of clay-bearing soil, sand, and lime, or concrete materials.Bricks are produced in numerous classes, types, materials, and sizes which vary with region and time period, and are produced in bulk quantities.During the Early Middle Ages the use of bricks in construction became popular in Northern Europe, after being introduced there from Northern-Western Italy.An independent style of brick architecture, known as brick Gothic (similar to Gothic architecture) flourished in places that lacked indigenous sources of rocks.Using the 17th century encyclopaedic text Tiangong Kaiwu, historian Timothy Brook outlined the brick production process of Ming Dynasty China: "..kilnmaster had to make sure that the temperature inside the kiln stayed at a level that caused the clay to shimmer with the colour of molten gold or silver.He also had to know when to quench the kiln with water so as to produce the surface glaze.

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Normally, bricks contain the following ingredients: In many modern brickworks, bricks are usually fired in a continuously fired tunnel kiln, in which the bricks are fired as they move slowly through the kiln on conveyors, rails, or kiln cars, which achieves a more consistent brick product.Long-distance bulk transport of bricks and other construction equipment remained prohibitively expensive until the development of modern transportation infrastructure, with the construction of canal, roads, and railways.Production of bricks increased massively with the onset of the Industrial Revolution and the rise in factory building in England.Examples of this architectural style can be found in modern-day Denmark, Germany, Poland, and Russia.This style evolved into Brick Renaissance as the stylistic changes associated with the Italian Renaissance spread to northern Europe, leading to the adoption of Renaissance elements into brick building.A brick is building material used to make walls, pavements and other elements in masonry construction.Traditionally, the term brick referred to a unit composed of clay, but it is now used to denote any rectangular units laid in mortar.For reasons of speed and economy, bricks were increasingly preferred as building material to stone, even in areas where the stone was readily available.It was at this time in London, that bright red brick was chosen for construction to make the buildings more visible in the heavy fog and to help prevent traffic accidents.Lightweight bricks (also called lightweight blocks) are made from expanded clay aggregate.Fired bricks are one of the longest-lasting and strongest building materials, sometimes referred to as artificial stone, and have been used since circa 5000 BC.

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  1. Botswana Defence Force consists of three separate service components each of which is commanded by a major general 1BDE GROUP,consists of 15inf,12inf,114medium.

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