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  2. Construction of the World Trade Center - Wikipedia

    en.wikipedia.org/wiki/Construction_of_the_World...

    [104] [93] All columns were placed on bedrock, which, unlike that in Midtown Manhattan, where the bedrock is shallow, is at 65–85 feet (20–26 m) below the surface. [105] The spandrel plates, typically 52 inches (1.3 m) deep, were welded to the exterior columns to create the modular pieces off-site at the fabrication shop.

  3. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    The novel shape of the Philips Pavilion built in Brussels for Expo 58 was achieved using reinforced concrete. François Coignet used iron-reinforced concrete as a technique for constructing building structures. [4] In 1853, Coignet built the first iron reinforced concrete structure, a four-story house at 72 rue Charles Michels in the suburbs of ...

  4. Slurry wall - Wikipedia

    en.wikipedia.org/wiki/Slurry_wall

    A slurry wall is a civil engineering technique used to build reinforced concrete walls in areas of soft earth close to open water, or with a high groundwater table. [1] This technique is typically used to build diaphragm (water-blocking) walls surrounding tunnels and open cuts, and to lay foundations. Slurry walls are used at Superfund sites to ...

  5. Deep foundation - Wikipedia

    en.wikipedia.org/wiki/Deep_foundation

    A deep foundation is a type of foundation that transfers building loads to the earth farther down from the surface than a shallow foundation does to a subsurface layer or a range of depths. A pile or piling is a vertical structural element of a deep foundation, driven or drilled deep into the ground at the building site.

  6. Properties of concrete - Wikipedia

    en.wikipedia.org/wiki/Properties_of_concrete

    Concrete cracks due to tensile stress induced by shrinkage or stresses occurring during setting or use. Various means are used to overcome this. Fiber reinforced concrete uses fine fibers distributed throughout the mix or larger metal or other reinforcement elements to limit the size and extent of cracks. In many large structures, joints or ...

  7. What is RAAC concrete? How to tell if school buildings are at ...

    www.aol.com/raac-concrete-tell-school-buildings...

    Reinforced autoclaved aerated concrete (RAAC) is a lightweight form of concrete that was used in schools, colleges and other building construction from the 1950s until the mid-1990s, according to ...

  8. Fiber-reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Fiber-reinforced_concrete

    Fiber-reinforced concrete or fibre-reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. It contains short discrete fibers that are uniformly distributed and randomly oriented. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers [1] – each of which lend varying ...

  9. Textile-reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Textile-reinforced_concrete

    Textile-reinforced concrete. Close-up of a piece of textile-reinforced concrete. Textile-reinforced concrete is a type of reinforced concrete in which the usual steel reinforcing bars are replaced by textile materials. Instead of using a metal cage inside the concrete, this technique uses a fabric cage inside the same.