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  2. Timber roof truss - Wikipedia

    en.wikipedia.org/wiki/Timber_roof_truss

    This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. Trusses usually occur at regular intervals, linked by longitudinal timbers such as purlins. The space between each truss is known ...

  3. American historic carpentry - Wikipedia

    en.wikipedia.org/wiki/American_historic_carpentry

    American historic carpentry is the historic methods with which wooden buildings were built in what is now the United States since European settlement. A number of methods were used to form the wooden walls and the types of structural carpentry are often defined by the wall, floor, and roof construction such as log, timber framed, balloon framed ...

  4. Truss bridge - Wikipedia

    en.wikipedia.org/wiki/Truss_bridge

    The Hart Bridge spanning the St. Johns River in Jacksonville, Florida, is a continuous, cantilevered truss bridge which combines a suspended road deck on the 332-metre (1,088 ft) main span and through truss decks on the adjacent approach spans. A railway bridge with a rail track in Leflore County, Mississippi.

  5. Howe truss - Wikipedia

    en.wikipedia.org/wiki/Howe_truss

    The Howe truss used iron vertical rods in tension with wooden diagonal braces. Both trusses used counter-bracing, which was becoming essential now that heavy railroad trains were using bridges. [1] In 1830, Stephen Harriman Long received a patent for an all-wood parallel chord truss bridge. Long's bridge contained diagonal braces which were ...

  6. Girder bridge - Wikipedia

    en.wikipedia.org/wiki/Girder_bridge

    A girder bridge is a bridge that uses girders as the means of supporting its deck. [1] The two most common types of modern steel girder bridges are plate and box. [citation needed] The term "girder" is often used interchangeably with "beam" in reference to bridge design. [2][3][4][5] However, some authors define beam bridges slightly ...

  7. Hammerbeam roof - Wikipedia

    en.wikipedia.org/wiki/Hammerbeam_roof

    A hammer-beam is a form of timber roof truss, allowing a hammerbeam roof to span greater than the length of any individual piece of timber.In place of a normal tie beam spanning the entire width of the roof, short beams – the hammer beams – are supported by curved braces from the wall, and hammer posts or arch-braces are built on top to support the rafters and typically a collar beam.

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