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Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. [1] No moments are transferred throughout the support, hence their structural type is known as simply supported. The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid
The Jeddo Road bridge is a two-span, steel-stringer bridge with a solid concrete pier located in the center of the stream below. Each span consists of six steel stringers braced with I-beams, with a maximum span length of 29 feet. The entire structure is 74 feet long and 23 feet wide, with a 20-foot-wide roadway edged by concrete curbs.
Using fallen trees, stringer bridges can be built. Wood laminated by stress, glued, dowels, or nails lumber are good for panel bridges. New lumber and wood scavenged from buildings and railroad ties can be used to build stringer bridges. [3] A licensed engineer can help operators design a safe, appropriate timber bridge.
The term "covered bridges" is also used for structures in China such as Chengyang Bridge (1912) and Xijin Bridge (rebuilt 1718) which have large enclosed spaces, but for these it appears that space is not provided for commercial or residential use. The term "covered bridge" is sometimes used broadly to describe any "bridge-like structure" that ...
Yellowstone River Bridge Extant Pratt truss: 1930 2017 Twin Bridges Road Yellowstone River: Reed Point: Stillwater: MT-174: Musselshell River Bridge Extant Steel rolled stringer: 1943 2017 US 12: Musselshell River: Melstone: Musselshell
Falsework parallel truss bridges temporarily supporting deck segment box structures Overpass under construction over Interstate 5 in Burbank, California, in July 2021 [4] [5] Sixth Street Viaduct Falsework - Bent 11 Jump Span. Shown in the background is a concrete Y-Arm.
A trestle bridge is a bridge composed of a number of short spans supported by closely spaced frames. A trestle (sometimes tressel) is a rigid frame used as a support, historically a tripod used to support a stool or a pair of isosceles triangles joined at their apices by a plank or beam such as the support structure for a trestle table .
Reinforced Concrete Bridges in Montana, 1900–1958 MPS: Dearborn River High Bridge: 1897 2003-12-18 Augusta: Lewis and Clark: Pratt half-deck truss Flathead River Bridge: 1912 2010-7-17 Columbia Falls vicinity: Flathead: Forsyth Bridge: 1905, 1939