Misplaced Pages

#436563

67-646: The John Seigenthaler Pedestrian Bridge (previously called the Shelby Street Bridge or Shelby Avenue Bridge ) is a truss bridge that spans the Cumberland River in Nashville, Tennessee , United States . The bridge spans 3,150 feet (960 m) and is one of the longest pedestrian bridges in the world. The John Seigenthaler Pedestrian Bridge was originally known as the Sparkman Street Bridge and

134-466: A Parker truss or Pratt truss than a true arch . In the Brown truss all vertical elements are under tension, with exception of the end posts. This type of truss is particularly suited for timber structures that use iron rods as tension members. See Lenticular truss below. This combines an arch with a truss to form a structure both strong and rigid. Most trusses have the lower chord under tension and

201-667: A covered bridge to protect the structure. In 1820, a simple form of truss, Town's lattice truss , was patented, and had the advantage of requiring neither high labor skills nor much metal. Few iron truss bridges were built in the United States before 1850. Truss bridges became a common type of bridge built from the 1870s through the 1930s. Examples of these bridges still remain across the US, but their numbers are dropping rapidly as they are demolished and replaced with new structures. As metal slowly started to replace timber, wrought iron bridges in

268-458: A Horse (Ride a Cowboy) " Save a Horse (Ride a Cowboy) " is a song written and recorded by American country music duo Big & Rich . It was released in April 2004 as the second single from their debut album Horse of a Different Color . It reached number 11 on the U.S. Billboard US Country chart . The song received wide exposure when ESPN featured the song in commercials for its coverage of

335-544: A Parker truss vary from near vertical in the center of the span to diagonal near each end, similar to a Warren truss. George H. Pegram , while the chief engineer of Edge Moor Iron Company in Wilmington, Delaware , patented this truss design in 1885. The Pegram truss consists of a Parker type design with the vertical posts leaning towards the center at an angle between 60 and 75°. The variable post angle and constant chord length allowed steel in existing bridges to be recycled into

402-594: A continuous truss functions as a single rigid structure over multiple supports. This means that the live load on one span is partially supported by the other spans, and consequently it is possible to use less material in the truss. Continuous truss bridges were not very common before the mid-20th century because they are statically indeterminate , which makes them difficult to design without the use of computers . A multi-span truss bridge may also be constructed using cantilever spans, which are supported at only one end rather than both ends like other types of trusses. Unlike

469-516: A continuous truss, a cantilever truss does not need to be connected rigidly, or indeed at all, at the center. Many cantilever bridges, like the Quebec Bridge shown below, have two cantilever spans supporting a simple truss in the center. The bridge would remain standing if the simple truss section were removed. Bridges are the most widely known examples of truss use. There are many types, some of them dating back hundreds of years. Below are some of

536-435: A conventional truss into place or by building it in place using a "traveling support". In another method of construction, one outboard half of each balanced truss is built upon temporary falsework. When the outboard halves are completed and anchored the inboard halves may then be constructed and the center section completed as described above. The Fink truss was designed by Albert Fink of Germany in 1854. This type of bridge

603-401: A few assumptions and the application of Newton's laws of motion according to the branch of physics known as statics . For purposes of analysis, trusses are assumed to be pin jointed where the straight components meet, meaning that taken alone, every joint on the structure is functionally considered to be a flexible joint as opposed to a rigid joint with the strength to maintain its shape, and

670-590: A lack of durability, and gave way to the Pratt truss design, which was stronger. Again, the bridge companies marketed their designs, with the Wrought Iron Bridge Company in the lead. As the 1880s and 1890s progressed, steel began to replace wrought iron as the preferred material. Other truss designs were used during this time, including the camel-back. By the 1910s, many states developed standard plan truss bridges, including steel Warren pony truss bridges. In

737-477: A lower chord (functioning as a suspension cable) that curves down and then up to meet at the same end points. Where the arches extend above and below the roadbed, it is called a lenticular pony truss bridge . The Pauli truss bridge is a specific variant of the lenticular truss, but the terms are not interchangeable. One type of lenticular truss consists of arcuate upper compression chords and lower eyebar chain tension links. Brunel 's Royal Albert Bridge over

SECTION 10

#1732892115437

804-704: A new span using the Pegram truss design. This design also facilitated reassembly and permitted a bridge to be adjusted to fit different span lengths. There are twelve known remaining Pegram span bridges in the United States with seven in Idaho , two in Kansas , and one each in California , Washington , and Utah . The Pennsylvania (Petit) truss is a variation on the Pratt truss . The Pratt truss includes braced diagonal members in all panels;

871-445: A strike; before the collapse, similar incidents had been common and had necessitated frequent repairs. Truss bridges consisting of more than one span may be either a continuous truss or a series of simple trusses. In the simple truss design, each span is supported only at the ends and is fully independent of any adjacent spans. Each span must fully support the weight of any vehicles traveling over it (the live load ). In contrast,

938-410: A suicidal man from jumping off the bridge. Ironically, John Seigenthaler is quoted to have said (to his Father Ryan High School classmates), "The Shelby Street Bridge is for the rats to go back home to East Nashville." [REDACTED] Media related to John Seigenthaler Pedestrian Bridge at Wikimedia Commons Truss bridge The nature of a truss allows the analysis of its structure using

1005-532: A variant of the lenticular truss, "with the top chord carefully shaped so that it has a constant force along the entire length of the truss." It is named after Friedrich Augustus von Pauli  [ de ] , whose 1857 railway bridge (the Großhesseloher Brücke  [ de ] ) spanned the Isar near Munich . ( See also Grosshesselohe Isartal station .) The term Pauli truss is not interchangeable with

1072-677: Is a Pratt truss design with a polygonal upper chord. A "camelback" is a subset of the Parker type, where the upper chord consists of exactly five segments. An example of a Parker truss is the Traffic Bridge in Saskatoon , Canada. An example of a camelback truss is the Woolsey Bridge near Woolsey, Arkansas . Designed and patented in 1872 by Reuben Partridge , after local bridge designs proved ineffective against road traffic and heavy rains. It became

1139-507: Is a hybrid between a Warren truss and a double-intersection Pratt truss. Invented in 1863 by Simeon S. Post, it is occasionally referred to as a Post patent truss although he never received a patent for it. The Ponakin Bridge and the Bell Ford Bridge are two examples of this truss. A Pratt truss includes vertical members and diagonals that slope down towards the center, the opposite of

1206-798: Is named after the K formed in each panel by the vertical member and two oblique members. Examples include the Südbrücke rail bridge over the River Rhine, Mainz, Germany, the bridge on I-895 (Baltimore Harbor Tunnel Thruway) in Baltimore, Maryland, the Long–Allen Bridge in Morgan City, Louisiana (Morgan City Bridge) with three 600-foot-long spans, and the Wax Lake Outlet bridge in Calumet, Louisiana One of

1273-493: Is often seen in country music videos. The video for " Save a Horse (Ride a Cowboy) ", the first hit single by Big & Rich , was shot entirely on the Shelby Street Bridge. The video for Emerson Drive 's 2007 hit single " Moments " was also filmed on and under the bridge. Several scenes from the 2011 video for "Together You and I" by Dolly Parton , and the 2015 video for " Crash and Burn " by Thomas Rhett were filmed on

1340-662: Is part of the Metro Nashville Greenway system, which is administered by the Parks Department. The eastern terminus includes a pedestrian plaza with special landscaping and is very close to Nissan Stadium . The western terminus comes out facing the Schermerhorn Symphony Center and is very close to the Country Music Hall of Fame , Music City Center , and Bridgestone Arena . The refurbishment of

1407-671: Is practical for use with spans up to 250 feet (76 m) and was a common configuration for railroad bridges as truss bridges moved from wood to metal. They are statically determinate bridges, which lend themselves well to long spans. They were common in the United States between 1844 and the early 20th century. Examples of Pratt truss bridges are the Governor's Bridge in Maryland ; the Hayden RR Bridge in Springfield, Oregon , built in 1882;

SECTION 20

#1732892115437

1474-513: Is the Victoria Bridge on Prince Street, Picton, New South Wales . Also constructed of ironbark, the bridge is still in use today for pedestrian and light traffic. The Bailey truss was designed by the British in 1940–1941 for military uses during World War II. A short selection of prefabricated modular components could be easily and speedily combined on land in various configurations to adapt to

1541-604: Is used in the teaching of statics, by the building of model bridges from spaghetti . Spaghetti is brittle and although it can carry a modest tension force, it breaks easily if bent. A model spaghetti bridge thus demonstrates the use of a truss structure to produce a usefully strong complete structure from individually weak elements. In the United States , because wood was in abundance, early truss bridges would typically use carefully fitted timbers for members taking compression and iron rods for tension members , usually constructed as

1608-551: The 2004 World Series of Poker . It was also featured in the Boston Legal episode "Death Be Not Proud". Big & Rich also released a remixed dance version of the song which appeared on their compilation Big & Rich's Super Galactic Fan Pak . They performed this remixed version at the CMT Video Music Awards in 2005. The song was also featured in a Chevrolet commercial that was aired during Super Bowl XLI and

1675-415: The 49th Annual Grammy Awards . The song appears on the game Karaoke Revolution Country , as well as in the 2012 film Magic Mike . The song also appears in the final episode of The Office . The song is a fusion of country rock and country rap . The first two verses detail "Big" Kenny Alphin and John Rich's arrival into Nashville, going into a bar, "passing out hundred-dollar bills" and, "buying

1742-597: The Dearborn River High Bridge near Augusta, Montana, built in 1897; and the Fair Oaks Bridge in Fair Oaks, California , built 1907–09. The Scenic Bridge near Tarkio, Montana , is an example of a Pratt deck truss bridge, where the roadway is on top of the truss. The queenpost truss , sometimes called "queen post" or queenspost, is similar to a king post truss in that the outer supports are angled towards

1809-1224: The Fort Wayne Street Bridge in Goshen, Indiana , the Schell Bridge in Northfield, Massachusetts , the Inclined Plane Bridge in Johnstown, Pennsylvania , the Easton–Phillipsburg Toll Bridge in Easton, Pennsylvania , the Connecticut River Bridge in Brattleboro, Vermont , the Metropolis Bridge in Metropolis, Illinois , and the Healdsburg Memorial Bridge in Healdsburg, California . A Post truss

1876-491: The Howe truss . The interior diagonals are under tension under balanced loading and vertical elements under compression. If pure tension elements (such as eyebars ) are used in the diagonals, then crossing elements may be needed near the center to accept concentrated live loads as they traverse the span. It can be subdivided, creating Y- and K-shaped patterns. The Pratt truss was invented in 1844 by Thomas and Caleb Pratt. This truss

1943-475: The River Tamar between Devon and Cornwall uses a single tubular upper chord. As the horizontal tension and compression forces are balanced these horizontal forces are not transferred to the supporting pylons (as is the case with most arch types). This in turn enables the truss to be fabricated on the ground and then to be raised by jacking as supporting masonry pylons are constructed. This truss has been used in

2010-456: The Shelby Street Bridge in Nashville. It was directed by David Hogan. The video caused damage to the bridge including dents and scuff marks, which cost $ 23,000 in repairs. In April 2007, the song was parodied by T-shirt manufacturer One World Gear, who began to offer a series of products on CafePress.com featuring variants of the slogan "Save a Horse, Ride a Cowboy", in which the word "cowboy"

2077-399: The infobox at the top, vertical members are in tension, lower horizontal members in tension, shear , and bending, outer diagonal and top members are in compression, while the inner diagonals are in tension. The central vertical member stabilizes the upper compression member, preventing it from buckling . If the top member is sufficiently stiff then this vertical element may be eliminated. If

John Seigenthaler Pedestrian Bridge - Misplaced Pages Continue

2144-412: The 1920s and 1930s, Pennsylvania and several states continued to build steel truss bridges, using massive steel through-truss bridges for long spans. Other states, such as Michigan , used standard plan concrete girder and beam bridges, and only a limited number of truss bridges were built. The truss may carry its roadbed on top, in the middle, or at the bottom of the truss. Bridges with the roadbed at

2211-606: The Jefferson Street Bridge was also repaired. In 1998 the John Seigenthaler Pedestrian Bridge was admitted to the National Register of Historic Places , due mainly to the unique truss design. Both the John Seigenthaler Pedestrian Bridge and the Jefferson Street Bridge were considered. The Jefferson Street Bridge was rejected because of its similarity to the John Seigenthaler Pedestrian Bridge and

2278-656: The Pennsylvania truss adds to this design half-length struts or ties in the top, bottom, or both parts of the panels. It is named after the Pennsylvania Railroad , which pioneered this design. It was once used for hundreds of bridges in the United States, but fell out of favor in the 1930s and very few examples of this design remain. Examples of this truss type include the Lower Trenton Bridge in Trenton, New Jersey ,

2345-526: The US started being built on a large scale in the 1870s. Bowstring truss bridges were a common truss design during this time, with their arched top chords. Companies like the Massillon Bridge Company of Massillon, Ohio , and the King Bridge Company of Cleveland , became well-known, as they marketed their designs to cities and townships. The bowstring truss design fell out of favor due to

2412-454: The balance between labor, machinery, and material costs has certain favorable proportions. The inclusion of the elements shown is largely an engineering decision based upon economics, being a balance between the costs of raw materials, off-site fabrication, component transportation, on-site erection, the availability of machinery, and the cost of labor. In other cases, the appearance of the structure may take on greater importance and so influence

2479-541: The bar a double round of Crown ." They vow that Nashville is "never gonna be the same." They ride around Nashville on horses, while everyone else says to "save a horse" and " ride a cowboy ." The music video was filmed in Nashville, Tennessee in the summer of 2003, and premiered on CMT on April 24, 2004. In the video, Big & Rich and other members of the MuzikMafia , including Gretchen Wilson and Cowboy Troy , dancers, marching bands, and other groups of people, parade on

2546-599: The bridge cost in excess of $ 15 million and was done under the supervision and planning of the Tennessee Department of Transportation . A new bridge called the Gateway Bridge, now known as the Korean War Veterans Memorial Bridge , was built to handle the vehicle traffic that used to travel over the John Seigenthaler Pedestrian Bridge. Due to the bridge's iconic status as a Nashville landmark, it

2613-434: The bridge. Aaron Cole 's music video "Yours to Use" was filmed on the bridge at night. While shooting a music video on the bridge, Jon Bon Jovi prevented a woman from committing suicide. In April 2014, the bridge was renamed the John Seigenthaler Pedestrian Bridge in honor of journalist and civil rights advocate John Seigenthaler . While reporting for The Tennessean in the 1950s, Seigenthaler once physically prevented

2680-437: The center of the structure. The primary difference is the horizontal extension at the center which relies on beam action to provide mechanical stability. This truss style is only suitable for relatively short spans. The Smith truss , patented by Robert W Smith on July 16, 1867, has mostly diagonal criss-crossed supports. Smith's company used many variations of this pattern in the wooden covered bridges it built. Save

2747-707: The center, the opposite of the Pratt truss . In contrast to the Pratt truss, the diagonal web members are in compression and the vertical web members are in tension. Few of these bridges remain standing. Examples include Jay Bridge in Jay, New York ; McConnell's Mill Covered Bridge in Slippery Rock Township, Lawrence County, Pennsylvania ; Sandy Creek Covered Bridge in Jefferson County, Missouri ; and Westham Island Bridge in Delta, British Columbia , Canada. The K-truss

John Seigenthaler Pedestrian Bridge - Misplaced Pages Continue

2814-414: The compression members and to control deflection. It is mainly used for rail bridges, showing off a simple and very strong design. In the Pratt truss the intersection of the verticals and the lower horizontal tension members are used to anchor the supports for the short-span girders under the tracks (among other things). With the Baltimore truss, there are almost twice as many points for this to happen because

2881-576: The construction of a stadium, with the upper chords of parallel trusses supporting a roof that may be rolled back. The Smithfield Street Bridge in Pittsburgh, Pennsylvania , is another example of this type. An example of a lenticular pony truss bridge that uses regular spans of iron is the Turn-of-River Bridge designed and manufactured by the Berlin Iron Bridge Co. The Pauli truss is

2948-429: The design decisions beyond mere matters of economics. Modern materials such as prestressed concrete and fabrication methods, such as automated welding , and the changing price of steel relative to that of labor have significantly influenced the design of modern bridges. A pure truss can be represented as a pin-jointed structure, one where the only forces on the truss members are tension or compression, not bending. This

3015-475: The earliest examples is the Old Blenheim Bridge , which with a span of 210 feet (64 m) and a total length of 232 feet (71 m) long was the second-longest covered bridge in the United States, until its destruction from flooding in 2011. The Busching bridge, often erroneously used as an example of a Long truss, is an example of a Howe truss, as the verticals are metal rods. A Parker truss bridge

3082-445: The fact that the John Seigenthaler Pedestrian Bridge was in better condition. The Jefferson Street Bridge was demolished in 1990 to make way for a new bridge that could handle more traffic. State inspectors declared the bridge to be in "poor" condition in 1992, and the bridge was closed to vehicular traffic in 1998. The bridge was originally slated for demolition. However, due to aesthetic, architectural, and historical considerations, it

3149-482: The lower chord (a horizontal member of a truss) is sufficiently resistant to bending and shear, the outer vertical elements may be eliminated, but with additional strength added to other members in compensation. The ability to distribute the forces in various ways has led to a large variety of truss bridge types. Some types may be more advantageous when the wood is employed for compression elements while other types may be easier to erect in particular site conditions, or when

3216-504: The more common designs. The Allan truss , designed by Percy Allan , is partly based on the Howe truss . The first Allan truss was completed on 13 August 1894 over Glennies Creek at Camberwell, New South Wales and the last Allan truss bridge was built over Mill Creek near Wisemans Ferry in 1929. Completed in March 1895, the Tharwa Bridge located at Tharwa, Australian Capital Territory ,

3283-412: The needs at the site and allow rapid deployment of completed trusses. In the image, note the use of pairs of doubled trusses to adapt to the span and load requirements. In other applications the trusses may be stacked vertically, and doubled as necessary. The Baltimore truss is a subclass of the Pratt truss. A Baltimore truss has additional bracing in the lower section of the truss to prevent buckling in

3350-400: The resulting shape and strength of the structure are only maintained by the interlocking of the components. This assumption means that members of the truss (chords, verticals, and diagonals) will act only in tension or compression. A more complex analysis is required where rigid joints impose significant bending loads upon the elements, as in a Vierendeel truss . In the bridge illustrated in

3417-474: The roadbed but are not connected, a pony truss or half-through truss. Sometimes both the upper and lower chords support roadbeds, forming a double-decked truss . This can be used to separate rail from road traffic or to separate the two directions of road traffic. Since through truss bridges have supports located over the bridge deck, they are susceptible to being hit by overheight loads when used on highways. The I-5 Skagit River bridge collapsed after such

SECTION 50

#1732892115437

3484-559: The short verticals will also be used to anchor the supports. Thus the short-span girders can be made lighter because their span is shorter. A good example of the Baltimore truss is the Amtrak Old Saybrook – Old Lyme Bridge in Connecticut , United States. The Bollman Truss Railroad Bridge at Savage, Maryland , United States is the only surviving example of a revolutionary design in the history of American bridge engineering. The type

3551-451: The simplest truss styles to implement, the king post consists of two angled supports leaning into a common vertical support. This type of bridge uses a substantial number of lightweight elements, easing the task of construction. Truss elements are usually of wood, iron, or steel. A lenticular truss bridge includes a lens-shape truss, with trusses between an upper chord functioning as an arch that curves up and then down to end points, and

3618-450: The standard for covered bridges built in central Ohio in the late 1800s and early 1900s. The Pegram truss is a hybrid between the Warren and Parker trusses where the upper chords are all of equal length and the lower chords are longer than the corresponding upper chord. Because of the difference in upper and lower chord length, each panel is not square. The members which would be vertical in

3685-603: The superstructures were made of steel that had been painted black. The bridge was the first in North America to have concrete arched trusses . The bridge was designed and construction was supervised by Howard M. Jones, the chief office engineer of the Nashville, Chattanooga and St. Louis Railway . The original architectural drawings as approved by Jones are archived at the Metro Transportation Offices. After twenty-five years of use, it became apparent that there

3752-472: The term lenticular truss and, according to Thomas Boothby, the casual use of the term has clouded the literature. The Long truss was designed by Stephen H. Long in 1830. The design resembles a Howe truss , but is entirely made of wood instead of a combination of wood and metal. The longest surviving example is the Eldean Covered Bridge north of Troy, Ohio , spanning 224 feet (68 m). One of

3819-525: 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 . When the truss members are both above and below the roadbed it is called a through truss; an example of this is the Pulaski Skyway , and where the sides extend above

3886-428: The upper chord under compression. In a cantilever truss the situation is reversed, at least over a portion of the span. The typical cantilever truss bridge is a "balanced cantilever", which enables the construction to proceed outward from a central vertical spar in each direction. Usually these are built in pairs until the outer sections may be anchored to footings. A central gap, if present, can then be filled by lifting

3953-414: Was also easy to assemble. Wells Creek Bollman Bridge is the only other bridge designed by Wendel Bollman still in existence, but it is a Warren truss configuration. The bowstring truss bridge was patented in 1841 by Squire Whipple . While similar in appearance to a tied-arch bridge , a bowstring truss has diagonal load-bearing members: these diagonals result in a structure that more closely matches

4020-464: Was built one block south of Broadway, connecting Sparkman Street and Shelby Avenue. The bridge was constructed at a cost of about $ 475,000. It opened July 5, 1909. A virtually identical bridge called the Jefferson Street Bridge was built at the same time. The Jefferson Street Bridge was opened a year after the Sparkman Street Bridge. The substructures of the bridges were light grey concrete, and

4087-475: Was decided that it should be converted to a pedestrian bridge rather than be demolished. The success of the Walnut Street Bridge as a part of Chattanooga's urban renewal efforts was a major consideration in keeping the bridge. The bridge was refurbished and includes an elevator, ramps, and stairways. The bridge has a center lane that is 15 feet (4.6 m) across to accommodate bicycles. Originally it

SECTION 60

#1732892115437

4154-405: Was named after its inventor, Wendel Bollman , a self-educated Baltimore engineer. It was the first successful all-metal bridge design (patented in 1852) to be adopted and consistently used on a railroad. The design employs wrought iron tension members and cast iron compression members. The use of multiple independent tension elements reduces the likelihood of catastrophic failure. The structure

4221-659: Was popular with the Baltimore and Ohio Railroad . The Appomattox High Bridge on the Norfolk and Western Railway included 21 Fink deck truss spans from 1869 until their replacement in 1886. There are also inverted Fink truss bridges such as the Moody Pedestrian Bridge in Austin, Texas. The Howe truss , patented in 1840 by Massachusetts millwright William Howe , includes vertical members and diagonals that slope up towards

4288-400: Was replaced with the name of any one of 177 different nationalities, including "American". The version of the T-shirt featuring the slogan "Save a Horse, Ride a Taiwanese" was singled out as "racially discriminatory" and "insulting to Taiwan " by Taiwanese and Hong Kong media . "Save a Horse (Ride a Cowboy)" debuted at number 58 on the U.S. Billboard Hot Country Singles & Tracks for

4355-417: Was something wrong with the concrete on the Sparkman Street Bridge. The worn surfaces of the concrete were chipped away between 1927 and 1930 and replaced with gunite . Thirty years later, repair work had to be done again. The Standard Engineering Company of Albany, New York was hired to repair the weathered bridge. They subcontracted the steel work to the Nashville Bridge Company . During this repair time,

4422-536: Was the second Allan truss bridge to be built, the oldest surviving bridge in the Australian Capital Territory and the oldest, longest continuously used Allan truss bridge. Completed in November 1895, the Hampden Bridge in Wagga Wagga, New South Wales , Australia, the first of the Allan truss bridges with overhead bracing, was originally designed as a steel bridge but was constructed with timber to reduce cost. In his design, Allan used Australian ironbark for its strength. A similar bridge also designed by Percy Allen

4489-435: Was thought that a trolley might use the center lane, but that idea was abandoned in favor of a bicycle lane. On each side of the bicycle lane are 10-foot-wide (3.0 m) elevated boardwalk-style sidewalks. The bridge includes four scenic pedestrian overlooks that, in the metal of the railing, have artistic renderings of the history of life on the Cumberland River. The bridge is dramatically lit at night. The refurbished bridge

#436563