At one of shipyards in British Columbia large timber derricks are employed for placing steel and machinery in ships; booms are 16 × 16-in. timbers 90 ft long; they swing through arc of 220° and each boom is capable of handling load of 10 tons at radius of 42 ft.


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    Title :

    Timber derricks for shipyard use


    Additional title:

    Eng News-Rec


    Published in:

    Publication date :

    1943


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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