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  2. Rail fastening system - Wikipedia

    en.wikipedia.org/wiki/Rail_fastening_system

    The earliest rail chairs, made of cast iron and introduced around 1800, were used to fix and support cast-iron rails at their ends; [2] they were also used to join adjacent rails. [ 35 ] In the 1830s rolled T-shaped (or single-flanged T parallel rail ) and I-shaped (or double-flanged T parallel or bullhead ) rails were introduced; both required ...

  3. Jim crow (tool) - Wikipedia

    en.wikipedia.org/wiki/Jim_crow_(tool)

    Illustration of a Jim crow from A Textbook on Civil Engineering — International Correspondence Schools published in 1899 by the Colliery Engineer Company.. A jim crow or rail bender is a tool for bending rails, consisting of a U-shaped or V-shaped armature with a hefty screw rod in its axis.

  4. Utility pole - Wikipedia

    en.wikipedia.org/wiki/Utility_pole

    A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and ...

  5. Derrick - Wikipedia

    en.wikipedia.org/wiki/Derrick

    The D-Frame supersedes the outriggers and provides a good controlling angle on the guys. The Hallen derrick is appropriate for, e.g., containers, logs, steel rail, sawn timber and heavy lifts. It does not lend itself to small, general cargo. It keeps the deck clear of guy ropes and preventors.

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  7. Guide rail - Wikipedia

    en.wikipedia.org/wiki/Guide_rail

    A guide rail is a system designed to guide vehicles back to the roadway and away from potentially hazardous situations. [4] There is no legal distinction between a guide rail and a guard rail . According to the US Federal Highway Administration , the terms guardrail and guiderail are synonymous.

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