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A lattice girder, like any girder, primarily resists bending. The component sections may typically include metal beams, channel and angle sections, with the lacing elements either metal plate strips, or angle sections. The lacing elements are typically attached using either hot rivets or threaded locator bolts.
The use of laced struts within a lattice girder can be seen in the two photographs of the c1860s lattice girder bridge at Llandeilo. The first table lists these early examples. (Note that some bridges, for example the New Clyde Viaduct (or Second Caledonian Bridge) in Glasgow, appear to be of lattice construction whereas in fact the latticing ...
The design was patented in 1820 by architect Ithiel Town. Originally a means of erecting a substantial bridge from mere planks employing lower–skilled labor, rather than heavy timbers and more expensive carpenters and equipment, the lattice truss has also been constructed using many relatively light iron or steel members.
The design is created by crossing the strips to form a grid or weave. [1] Latticework may be functional – for example, to allow airflow to or through an area; structural, as a truss in a lattice girder; [2] used to add privacy, as through a lattice screen; purely decorative; or some combination of these.
Plate girders can have a greater height than rolled steel girders and are not limited to standardized shapes. The ability to customize a girder to the exact load conditions allows the bridge design to be more efficient. Plate girder can be used for spans between 10 metres and more than 100 metres (33 feet to more than 330 feet).
The Hares Hill Road Bridge superstructure consists of one 103 feet 4 inches (31.50 m) wrought-iron lattice girder span. The ends are supported on stone masonry abutments built by Abraham Taney Jr., also in 1869. The bridge has been extensively rehabilitated several times, one of which added the current open grid steel deck.
A girder (/ ˈ ɡ ɜːr d ər /) is a beam used in construction. [1] It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing flanges separated by a stabilizing web, but may also have a box shape, Z shape, or other forms. Girders are commonly used to ...
It is a very fine example of a single track steel lattice girder bridge of the 1870s and 1880s. Como is the longest single track steel lattice girder bridge in NSW and the only such bridge within 250 kilometres (160 mi) of Sydney. It was a notorious bottleneck within five years of its completion when the single track on either side of the ...