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This gives the bridge an unfinished saw-toothed appearance when viewed from the side or below, and makes the design very easy to identify. If the bridge deck is carried along the bottom of the truss (called a through truss) or if a lightweight lower chord is present, identification is made solely by the multiple diagonal members emanating from ...
The model chosen was the St Germans Viaduct composed of composite deck Queen post trusses, the bottom chords were large iron rods. Whitton's staff redesigned the trusses to be all timber and the viaducts were built during construction of the Glen Innes to Tenterfield section 1884-86. [1]
The model chosen was the St Germans Viaduct composed of composite deck Queen post trusses, with the bottom chords being large iron rods. Whitton's staff redesigned the trusses to be all timber and the viaducts were built during construction of the Glen Innes to Tenterfield section 1884-86. [1]
Which chord carries tension and which carries compression depends on the overall direction of bending. In the truss pictured above right, the bottom chord is in tension, and the top chord in compression. The diagonal and vertical members form the truss web, and carry the shear stress. Individually, they are also in tension and compression, the ...
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The Prince Alfred Bridge over the Murrumbidgee River is a three span, wrought iron, pin jointed Warren truss on cast iron cylindrical piers. A Warren truss, as originally patented, consists of a configuration of repetitive equilateral triangles that support a road on either the top or bottom chord.
The truss may carry its roadbed on top, in the middle, or at the bottom of the truss. Bridges with the roadbed at the top or the bottom are the most common as this allows both the top and bottom to be stiffened, forming a box truss. When the roadbed is atop the truss, it is a deck truss; an example of this was the I-35W Mississippi River bridge.