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  2. High-speed door - Wikipedia

    en.wikipedia.org/wiki/High-speed_door

    High-speed doors are door systems, mainly used in industrial applications. They are technical enhancements of the generally known sectional doors, PVC fabric doors or roller shutters. The main difference is that the durable construction provides a higher operating speed and they are able to sustain a higher number of cycles (opening and closing ...

  3. Rytec Corporation - Wikipedia

    en.wikipedia.org/wiki/Rytec_Corporation

    Rytec Corporation is an American manufacturer of high-cycle, high-speed doors for industrial and commercial applications. Headquartered in Jackson, Wisconsin, Rytec is considered a North American leader in the development, manufacture and sale of high-performance doors. [2] [3] [4]

  4. Door - Wikipedia

    en.wikipedia.org/wiki/Door

    A high-speed door is a very fast door some with opening speeds of up to 4 m/s, mainly used in the industrial sector where the speed of a door has an effect on production logistics, temperature and pressure control.

  5. Automatic door - Wikipedia

    en.wikipedia.org/wiki/Automatic_door

    Automatic door. A pair of automatic doors. An automatic door, also known as an auto door, is a door that opens automatically, without the need for human intervention or usually upon sensing the approach of a person. A person can be detected by microwave pulses, infrared sensors, or pressure-sensing pads. [1]

  6. Ladder paradox - Wikipedia

    en.wikipedia.org/wiki/Ladder_paradox

    The ladder paradox (or barn-pole paradox) is a thought experiment in special relativity. It involves a ladder, parallel to the ground, travelling horizontally at relativistic speed (near the speed of light) and therefore undergoing a Lorentz length contraction. The ladder is imagined passing through the open front and rear doors of a garage or ...

  7. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    Special features include aerodynamic car and counterweights, and cabin pressure control to help passengers adapt smoothly to pressure changes. The downwards journey is completed at a reduced speed of 600 meters per minute, with the doors opening at the 52nd second. Many high speed elevators also have aerodynamic cab exteriors. [109]