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  2. ASTM A500 - Wikipedia

    en.wikipedia.org/wiki/ASTM_A500

    ASTM A500 is a standard specification published by the ASTM for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. It is commonly specified in the US for hollow structural sections, but the more stringent CSA G40.21 is preferred in Canada.

  3. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    Steel never turns into a liquid below this temperature. Pure Iron ('Steel' with 0% Carbon) starts to melt at 1,492 °C (2,718 °F), and is completely liquid upon reaching 1,539 °C (2,802 °F). Steel with 2.1% Carbon by weight begins melting at 1,130 °C (2,070 °F), and is completely molten upon reaching 1,315 °C (2,399 °F).

  4. Tread plate - Wikipedia

    en.wikipedia.org/wiki/Tread_plate

    Tread plate, also known as checker plate and diamond plate, is a type of metal stock with a regular pattern or lines on one side as a decoration. These products are often mistakenly used as slip resistant products.

  5. Wall stud - Wikipedia

    en.wikipedia.org/wiki/Wall_stud

    Wall studs are framing components in timber or steel-framed walls, that run between the top and bottom plates.It is a fundamental element in frame building. The majority non-masonry buildings rely on wall studs, with wood being the most common and least-expensive material used for studs.

  6. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    Intermediate metal conduit (IMC) is a steel tubing heavier than EMT but lighter than RMC. It may be threaded. Electrical metallic tubing (EMT), sometimes called thin-wall, is commonly used instead of galvanized rigid conduit (GRC), as it is less costly and lighter than GRC. EMT itself is not threaded, but can be used with threaded fittings that ...

  7. Springfield race riot of 1908 - Wikipedia

    en.wikipedia.org/wiki/Springfield_race_riot_of_1908

    [106] [127] They woke him and, armed with a piece of 2x4 scantling, beat "the black wretch" while a crowd gathered around to watch. [110] [123] The Ballard brothers, Sears, and Edwards dragged and beat James for half a block while the crowd chanted "Kill!". [128] It was reported that "only the arrival of officers" prevented the mob from killing ...

  8. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...

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