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  2. Rebar - Wikipedia

    en.wikipedia.org/wiki/Rebar

    Reinforcing bars in masonry construction have been used since antiquity, with Rome using iron or wooden rods in arch construction. Iron tie rods and anchor plates were later employed across Medieval Europe, as a device to reinforce arches, vaults, and cupolas. [5] [6] 2,500 meters of rebar was used in the 14th-century Château de Vincennes. [7]

  3. Formwork - Wikipedia

    en.wikipedia.org/wiki/Formwork

    The sheet-based formwork with V-shaped rails keeps shape in one direction (vertically) but, before being reinforced with steel beams, can be bent. Multiple sheets can be fixed together in same manner fences made of iron "sheets" can be. A circle can be made from a single sheet of "21" formwork, allowing cylindrical columns to be poured.

  4. Ferrocement - Wikipedia

    en.wikipedia.org/wiki/Ferrocement

    Ferrocement or ferro-cement [1] is a system of construction using reinforced mortar [2] or plaster (lime or cement, sand, and water) applied over an "armature" of metal mesh, woven, expanded metal, or metal-fibers, and closely spaced thin steel rods such as rebar. The metal commonly used is iron or some type of steel, and the mesh is made with ...

  5. List of commercially available roofing materials - Wikipedia

    en.wikipedia.org/wiki/List_of_commercially...

    Shake (shingle), Are different than wood shingles in that they are split on one side and sawed on the back side. Commonly referred to as "resawn shakes". A cedar shake is not the same as a cedar shingle. [3] Asphalt shingle made of bitumen embedded in an organic or fiberglass mat, usually covered with colored, man-made ceramic grit. Cheaper ...

  6. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    The terms angle iron, channel iron, and sheet iron have been in common use since before wrought iron was replaced by steel for commercial purposes. They have lived on after the era of commercial wrought iron and are still sometimes heard today, informally, in reference to steel angle stock, channel stock, and sheet, despite that they are ...

  7. Today's Wordle Hint, Answer for #1271 on Wednesday, December ...

    www.aol.com/todays-wordle-hint-answer-1271...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1271 ahead. Let's start with a few hints.

  8. Sweet News: These Are the Most Popular Christmas Cookies in ...

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    See if your favorite made the list. ... The best laundry detergent sheets of 2025. AOL. Where to shop today's best deals: Kate Spade, Amazon, Walmart and more. AOL.

  9. Steelmaking - Wikipedia

    en.wikipedia.org/wiki/Steelmaking

    Steel is made from iron and carbon. Cast iron is a hard, brittle material that is difficult to work, whereas steel is malleable, relatively easily formed and versatile. On its own, iron is not strong, but a low concentration of carbon – less than 1 percent, depending on the kind of steel – gives steel strength and other important properties.

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