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The longest steel reinforced bridge, in 2024, is the 600 metres (2,000 ft) Tian'e Longtan Bridge, Guangxi Zhuang, China. [8] The US's longest unreinforced concrete span, is the 200 feet (61 m) arch of the, 1910, Rocky River Bridge in Cleveland, Ohio. [9] Early extant examples include:
A segmental bridge is a bridge built in short sections (called segments), i.e., one piece at a time, as opposed to traditional methods that build a bridge in very large sections. The bridge is made of concrete that is either cast-in-place (constructed fully in its final location) or precast concrete (built at another location and then ...
Gien Bridge (Loiret, France) – Masonry piers, protected downstream here by backwaters. In masonry bridge piers, there is a resistant part and a filling part: [6] The periphery of the shafts over a certain thickness constitutes the resistant part, made of dressed stones in the angles and squared or even rough stones.
A concrete girder bridge pier during construction prior to installation of the bridge deck and parapets, consisting of multiple angled pylons for support (bottom), a horizontal concrete cap (center), and girders (top) with temporary wood bracing. The substructure is made of multiple parts as well:
A similar bridge on this river was fabricated ashore and pushed across its pylons. Single box girder bridge , flyover above eastern approach of the San Francisco–Oakland Bay Bridge. A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box.
The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid across a stream. Bridges designed for modern infrastructure will usually be constructed of steel or reinforced concrete, or a combination of both. The concrete elements may be reinforced or prestressed.
A cantilever bridge is a bridge built using structures that project horizontally into space, supported on only one end (called cantilevers).For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete.
A concrete girder bridge pier during construction prior to installation of the bridge deck and parapets, consisting of multiple angled pylons for support (bottom), a horizontal concrete cap (center), and girders (top) with temporary wood bracing A quadruple compound pier supporting the fly-over at the traffic junction 24 Oktoberplein (Utrecht ...