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  2. Sheet Metal Workers' International Association - Wikipedia

    en.wikipedia.org/wiki/Sheet_Metal_Workers...

    The Sheet Metal Workers' International Association (SMWIA) was a trade union of skilled metal workers who perform architectural sheet metal work, fabricate and install heating and air conditioning work, shipbuilding, appliance construction, heater and boiler construction, precision and specialty parts manufacture, and a variety of other jobs involving sheet metal.

  3. Aluminium foam sandwich - Wikipedia

    en.wikipedia.org/wiki/Aluminium_foam_sandwich

    Aluminium foam sandwich (AFS) is a sandwich panel product which is made of two metallic dense face sheets and a metal foam core made of an aluminium alloy. AFS is an engineering structural material owing to its stiffness-to-mass ratio and energy absorption capacity ideal for application such as the shell of a high-speed train .

  4. International Association of Sheet Metal, Air, Rail and ...

    en.wikipedia.org/wiki/International_Association...

    The product of a merger between the Sheet Metal Workers’ International Association (SMWIA) and the United Transportation Union (UTU), SMART represents over 210,000 sheet metal workers, service technicians, bus operators, engineers, conductors, sign workers, welders, and production employees, among others, throughout the United States, Puerto ...

  5. Sandwich panel - Wikipedia

    en.wikipedia.org/wiki/Sandwich_panel

    The structural functionality of a sandwich panel is similar to the classic I-beam, where two face sheets primarily resist the in-plane and lateral bending loads (similar to flanges of an I- beam), while the core material mainly resists the shear loads (similar to the web of an I-beam). [1]

  6. Mortise and tenon - Wikipedia

    en.wikipedia.org/wiki/Mortise_and_tenon

    A mortise is a hole cut into a timber to receive a tenon. There are several kinds of mortise: [16] Open mortise: a mortise that has only three sides. (See bridle joint). Stub mortise: a shallow mortise, the depth of which depends on the size of the timber; also a mortise that does not go through the workpiece (as opposed to a "through mortise").

  7. Bed - Wikipedia

    en.wikipedia.org/wiki/Bed

    Bed rails and frames are often attached to the bed post using knock-down fittings. [25] [26] A knock-down fitting enables the bed to be easily dismantled for removal. Primary knock-down fittings for bed rails are as follows: Pin-and-hook fastener. A mortise or slot is cut vertically in the bedpost. Pins are inserted horizontally in the bed post ...