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  • maria flor

    maria flor

    @maria-flor-8cAkif • Jul 2, 2011

    as far as I know it is used for earthquakes. another is, it is also used so that the columns and beams will have freedom to expand and contract as the temperature changes.

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  • Capt Spark

    Capt Spark

    @capt-spark-xvppcH • Jul 2, 2011

    One good example of roller support is for expandable bridges.
    For allowing thermal expansion, one end is pinned and one side left on roller

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