A lattice bridge is a form of truss bridge that uses many small, closely spaced diagonal elements forming a lattice. The lattice Truss Bridge was patented in 1820 by architect Ithiel Town.
Lattice Truss Bridge
Interior structure of a covered bridge utilizing a plank-lattice structure
Originally a design to allow a substantial bridge to be made from planks employing lower–skilled labor, rather than heavy timbers and more expensive carpenters, this type of bridge has also been constructed using many relatively light iron or steel members. The individual elements are more easily handled by the construction workers, but the bridge also requires substantial support during construction. A simple lattice truss will transform the applied loads into a thrust, as the bridge will tend to change length under load. This is resisted by pinning the lattice members to the top and bottom chords, which are more substantial than the lattice members, but which may also be fabricated from relatively small elements rather than large beams.
The Belfast truss is a cross between Town's lattice truss and the bowstring truss. It was developed in Ireland as a wide-span shallow rise roof truss for industrial structures. McTear & Co of Belfast, Ireland began fabricating these trusses in wood starting around 1866. By 1899, spans of 24 metres (79 ft) had been achieved, and in the 20th century, shipyards and airplane hangars demanded ever greater clear spans.[1]
^J. R. Gilfillan, S. G. Gilbert, The Historic Belfast Timber Truss - A Way to Promote Sustainable Roof Construction, 2002.
^J. A. L. Waddell, Bridge Engineering Vol. 1, Wiley, New York, 1916; page 23.
External links
Picture and description of Town's lattice truss
Watson Mill Bridge, Georgia, US
January 30, 2023
lattice, truss, bridge, lattice, bridge, form, truss, bridge, that, uses, many, small, closely, spaced, diagonal, elements, forming, lattice, lattice, truss, bridge, patented, 1820, architect, ithiel, town, lattice, truss, bridgeinterior, structure, covered, b. A lattice bridge is a form of truss bridge that uses many small closely spaced diagonal elements forming a lattice The lattice Truss Bridge was patented in 1820 by architect Ithiel Town Lattice Truss BridgeInterior structure of a covered bridge utilizing a plank lattice structureAncestorTruss bridgeRelatedNoneDescendantNoneCarriesPedestrians livestock vehiclesSpan rangeshort to mediumMaterialwood planks and beams or steel angles and beams appropriate decking materialMovableNoDesign effortmediumFalsework requiredSometimesOriginally a design to allow a substantial bridge to be made from planks employing lower skilled labor rather than heavy timbers and more expensive carpenters this type of bridge has also been constructed using many relatively light iron or steel members The individual elements are more easily handled by the construction workers but the bridge also requires substantial support during construction A simple lattice truss will transform the applied loads into a thrust as the bridge will tend to change length under load This is resisted by pinning the lattice members to the top and bottom chords which are more substantial than the lattice members but which may also be fabricated from relatively small elements rather than large beams Contents 1 Belfast truss 2 Wood lattice truss bridges 3 Iron or steel lattice truss bridges 4 See also 5 References 6 External linksBelfast truss Edit Belfast truss as roof support in an aircraft hangar from the First World War at the Duxford Imperial War Museum The Belfast truss is a cross between Town s lattice truss and the bowstring truss It was developed in Ireland as a wide span shallow rise roof truss for industrial structures McTear amp Co of Belfast Ireland began fabricating these trusses in wood starting around 1866 By 1899 spans of 24 metres 79 ft had been achieved and in the 20th century shipyards and airplane hangars demanded ever greater clear spans 1 Wood lattice truss bridges Edit Root Road Covered Bridge Ashtabula County Ohio Bartonsville Covered Bridge Brown Covered Bridge Burt Henry Covered Bridge Cornish Windsor Covered Bridge Euharlee Covered Bridge Kingsley Covered Bridge Newton Falls Covered Bridge Newton Falls Ohio Poole s Mill Covered Bridge Root Road Covered Bridge Waterford Covered Bridge Watson Mill Covered Bridge Windsor Mills Covered Bridge Worrall Covered Bridge Frankenfield Covered Bridge Uhlerstown Covered Bridge Pennsylvania Van Tran Flat Bridge Zehnder s Holz BruckeIron or steel lattice truss bridges Edit Railroad bridge across the Iowa River in Iowa City Iowa Howard Carroll built the first completely wrought iron lattice truss bridge This was built for the New York Central Railroad in 1859 2 Bennerley Viaduct Bridge in Brown Township Dowery Dell Viaduct also known as Hunnington or Frankley Viaduct Kew Railway Bridge Norwottuck Rail Trail Bridge Willow Creek Bridge 1913 in Pierce County Nebraska Upper Slate Run Bridge 1890 a quintangular lattice truss in Lycoming County PennsylvaniaSee also Edit Wikimedia Commons has media related to Town Lattice truss bridges Lattice girder Brown trussReferences Edit J R Gilfillan S G Gilbert The Historic Belfast Timber Truss A Way to Promote Sustainable Roof Construction 2002 J A L Waddell Bridge Engineering Vol 1 Wiley New York 1916 page 23 External links EditPicture and description of Town s lattice truss Watson Mill Bridge Georgia US Retrieved from https en wikipedia org w index php title Lattice truss bridge amp oldid 1107993319, wikipedia, wiki, book, books, library,
