7/30/2019 Bridg Se

1/28

7/30/2019 Bridg Se

2/28

Arch Bridge: Arch bridges are called arch bridge because of having a shape similar toarches. These bridges are normally constructed with weight equally distributed into theropes or chains at both the ends. The oldest arch bridge that still exists is the MycenaeanArkadiko Bridge constructed in Greece somewhere around 1300BC. Although, Greeksand Etruscans were familiar with the arches, Romans were known to be the first who

discover the art of constructing an arch bridge. Present day arch bridge are the modifiedfrom as they have become compression arch suspended deck bridge which rely on light but stronger tensile construction material.

Suspension Bridge: A suspension bridge is a bridge that hangs from steel cables whichare supported by towers on each end. Technically, the load of the bridge is transformedinto the stretchiness in the cables. Some of the popular suspension bridges include theGolden Gate Bridge of United States, the Humber Bridge of England and the Tsing MABridge of China.

Cable-stayed Bridge: These are almost similar to suspension bridge in their structure but

with few exceptions. The major differences between the two exist in the quantity of steelcable used. In the cable-stayed bridge, the towers used to support cables are relativelyshorter and require less amount of cable as compared to suspension bridge. Cable-stayed

bridge has two different versions: the harp design and fan variant design. Cables areconnected to several points in harp design while in fan variant, the cables are attached tothe tower. In United States, Cable Bridge has the reputation of first of this type. Other

popular bridge is Centennial Bridge.

Cantilever Bridge: These are the bridges which are constructed in such a way that theystand out in the direction of horizontal-axis in space. These bridges are supported just onone end. The bridges for low traffic are simply based on beams whereas the bridges for heavy traffic are comprised of box grinders or trusses. Two of the most popular cantilever

http://www.typesofeverything.com/wp-content/uploads/2011/03/Cable-stayed-Bridge1.jpg

7/30/2019 Bridg Se

3/28

bridges include the Quebec Bridge of Canada (1800 feet long) and Oakland Bay Bridgeof Sans Francisco (1400 feet long).

Bridges are surely a great way to reach the places which people never think of by anyother simple mean. Bridges not only connect far-off lands but also provide opportunity to

the mankind to explore different aspect of new technology. A bridge may be a aninspiration of a man who saw a block of wood floating on a water surface or perhaps theurge to come in contact with people living far-off ends. Whatever the reasons, the bridgeis surely a great way to defeat the physical hindrances.

Arch Bridge

Arch bridges date back to ancient times, when they were constructed from stonesor bricks. Bridges built during the Middle Ages usually rested on basic stonearches with heavy support structures. Children can learn about the structure anddesign of arch bridges by making their own using a piece of cardboard about 1

inche by 11 inches. The cardboard is positioned on a table to resemble an arch anda stack of books placed at each end. This helps children understand how arch bridges withstand compression and distribute weight.

Beam Bridge

A beam bridge is basically a horizontal beam supported by piers that takes theweight of the beam and traffic passing over it. Concrete is often used in making

beam bridges because it isn't expensive and withstands compression, whichhappens when weight pushes down on the beam, pushing the beam's top edgetogether. Children can make a beam bridge using a flat eraser or a small sponge

and slicing a shallow V-shaped indentation at the top and bottom of the sponge or eraser. Place stacks of books at each end for support, then press down on thecenter of the bridge and see what happens. The Lake Ponchartrain Causeway isthe world's longest beam bridge. It is 24 miles long and the beams are joinedtogether in what is known as a continuous span.

Suspension Bridge

Suspension bridges are lightweight but strong and can 2,000-7,000 feet long.They are held together by cables extending the full length of the bridge. Earlysuspension bridges were made with twisted grass. Children can better understandthe concept of suspension bridges using a simple experiment with a newspaper and a book. Folding the newspaper twice lengthwise and folding it into a tubeshould make it strong enough to hold the book. The Tacoma Narrows Bridge near Washington is a famous suspension bridge.

Read more: Types of Bridges for Kids | eHow.com http://www.ehow.com/info_7935529_types-bridges-kids.html#ixzz1IpJPAF3z

http://www.ehow.com/info_7935529_types-bridges-kids.html#ixzz1IpJPAF3zhttp://www.ehow.com/info_7935529_types-bridges-kids.html#ixzz1IpJPAF3zhttp://www.ehow.com/info_7935529_types-bridges-kids.html#ixzz1IpJPAF3zhttp://www.ehow.com/info_7935529_types-bridges-kids.html#ixzz1IpJPAF3z

7/30/2019 Bridg Se

4/28

Bridges are defined as a structure that is used to cross an area that might otherwise behard to cross. There are many types of bridges. There are what we call Ethernet bridges

which have to do with computer, and there is the bridge to terabithia which isnt even a bridge, but a book.There are bridges like the Clifton suspension bridge, and the golden gate bridge. Soon wewill even have the skywalk bridge in the grand canyon.The Clifton suspension bridge The idea of building this great bridge that is located inBristol, England came about in 1754 but, was never finished until 1864. They had lots of starts and stops. The bridge was closed to all traffic in 2003 because of the weight caused

by people arriving to the Bristol festival.The golden gate bridge - A bridge that was designed by Joseph Strauss in 1921. The

bridge spans the golden gate straight of San Francisco and was completed in 1937.The skyway bridge - A bridge made of glass that is suspended above the grand canyon.

Its objective is to let people have a better view of the majesty of the grand canyon.The above are the actual great bridges that have been built by a bridge builder using great

bridge design.Of course there are other types of bridges if you prefer, like the bridge game (a card game

played by four people) or even a bridge loan (a loan to tide you over in difficult times).These types of bridges just don't seem as impressive as the former ones, do they?

7/30/2019 Bridg Se

5/28

1.

o Golden Gate Bridge, San Francisco, California bridges

over bay image by Albert Lozano from Fotolia.com

When bridge building actually started is unknown. One of the firstdocumented bridges is a relief showing Seti I (1,291 to 1,279 BCE)crossing a bridge, while returning victorious from fighting in Canaan, inthe first year of his reign. The beginning of bridge building engineering, tocross longer distances than just a few feet, is generally credited to theRomans. Their construction of permanent roads with bridges were createdfor the movement of troupes. A few of these structures still stand today.

2. Beam

o Beam bridge over a waterfall sunny waterfall, lazarevskoe,sochi, russia image by Denis Babenko from Fotolia.com

The beam type of bridge is the easiest construction to understand; theseinclude when a tree that has fallen, or been cut to cross a small creek. Thestacking of stones on each end to support a slab of stone is a beam type or span bridge. Multiple upright beams supporting a single or multiple decksallows this type of bridge to span distances more than just a few feet.

3. Arch

o Stone arch bridge Twin arched bridge on Dartmoor image by Andrew Real from Fotolia.com

The Roman's primary bridges were arch type constructed from heavystone blocks. These bridges were engineered by wedging stones againstanother forming an arch. The last stone to be put into place, completingthe arch, is called the keystone. Some of these bridges contained manyarches to transverse further distances. Many of the Roman built bridgesstill stand today. Some are still carrying pedestrians and other traffic,while some were constructed to carry water.

4. Truss

http://i.ehow.com/images/a06/to/2c/basic-types-bridges-1.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-1.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-2.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-2.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-3.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-3.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-1.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-1.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-2.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-2.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-3.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-3.1-800X800.jpg

7/30/2019 Bridg Se

6/28

o Truss bridge construction Bridge image by LukeHaverkamp from Fotolia.com

The rigidity of a triangle that is anchored at each joint is the basicconfiguration used in the construction of truss bridges. One triangleattached to another, making a straight line in single or multiple layers can

be constructed to span long distances. A king post truss bridge is two righttriangles attached at the 90 degree angles, with the one end of thehypotenuse attached at a beam, and the other attached to the post in themiddle of the bridge. A queen post adds a horizontal top span, and cantransverse even longer distances.

5. Suspension

o Example of suspension bridge over a river menaisuspension bridge. image by Harvey Hudson from Fotolia.com

Suspension type bridges are the longest in the world. They are similar withcable-stayed wire type bridges, and are capable of spanning over a mile.Cables are hung from suspenders to support the deck from one pier toanother, and are anchored at the end pillar or post. Multiple combinationsof these engineering techniques are utilized to construct some of the mostfamous bridges in the world.

6. Cantilever o The cantilever bridge is engineered where the deck projects farther than its

support and is anchored only at one end. These bridges can be designed inconjunction with arch, truss and suspension engineering for a multitude of construction arrangements. The terrain and materials used will dictate theconstruction array.

Movable Bridges

o Draw bridge in up position draw bridges of chicago image by Alexey Stiop from Fotolia.com

Movable bridges are made up of two types: the draw bridge, and the swing bridge. The draw bridge is hinged on one end and cables or tresses hold

http://i.ehow.com/images/a06/to/2c/basic-types-bridges-4.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-4.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-5.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-5.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-7.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-7.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-4.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-4.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-5.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-5.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-7.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-7.1-800X800.jpg

7/30/2019 Bridg Se

7/28

the other end in place when the bridge is down. Raising and lowering the bridge is performed by either gears cranking the bridge up, or the use of cable pulleys. The other type of movable bridge is a swing bridge. It can

be moved from a center pivot or pivoted to the side with the aid of floating pontoons.

Pontoon Bridges

o Pontoon deck bridge for floating dock rusty metal ladder image by GeoM from Fotolia.com

All pontoon bridges are temporary bridges supported by boats, barges or pontoons. The rigid deck spans from one pontoon to another so that no onefloating support the traffic load. Pontoon bridges are primarily used by themilitary, and for temporary traffic while the main bridge is repaired or anew bridge is constructed.

A bridge is a structure built to span a gorge, valley, road, railroad track,river, body of water, or any other physical obstacle. Designs of bridgeswill vary depending on the function of the bridge and the nature of theterrain where the bridge is to be constructed.

History

The Si-o-se Pol bridge over Zayandeh River is the epitome of Safavid

http://i.ehow.com/images/a06/to/2c/basic-types-bridges-8.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-8.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-8.1-800X800.jpghttp://i.ehow.com/images/a06/to/2c/basic-types-bridges-8.1-800X800.jpg

7/30/2019 Bridg Se

8/28

dynasty (1502-1722 ) bridge design. Esfahan, Iran.

The first bridges were made by nature, as simple as a log falling across ariver. The first bridges made by humans were spans made of wooden logsor planks and eventually stones, using a simple support and crossbeam

arrangement. Most of these early bridges were very poorly built and couldrarely support heavy weights. It was this inadequacy which led to thedevelopment of better bridges. The arch was first used by the RomanEmpire for bridges and aqueducts, some of which still stand today. Thesearch based bridges could stand in conditions that would damage or destroymore primitive designs.

An English 18th century example of a bridge in the Palladian style, withshops on the span: Pulteney Bridge, Bath.

7/30/2019 Bridg Se

9/28

An example is the Alcntara Bridge, built over the river Tagus, near Portugal. Most earlier bridges would have been swept away by the strongcurrent. The Romans also used cement, which reduced the variation of strength found in natural stone. One type of cement, called pozzolana,

consisted of water, lime, sand, and volcanic rock. Brick and mortar bridges were built after the Roman era, as the technology for cement waslost then later rediscovered.

Although large Chinese bridges existed in wooden construction since theancient Warring States, the oldest surviving stone bridge in China is theZhaozhou Bridge, built from 595 to 605 AD during the Sui Dynasty. This

bridge is also historically significant as it is the world's oldest open-spandrel stone segmental arch bridge. European segmental arch bridgesdate back to at least the Alcontar Bridge (approximately 2nd centuryAD), while the enormous Roman era Trajan's Bridge (105 AD) featured

open-spandrel segmental arches in wooden construction.Rope bridges, a simple type of suspension bridge, were used by the Incacivilization in the Andes mountains of South America, just prior toEuropean colonization in the 1500s.

During the 18th century there were many innovations in the design of timber bridges by Hans Ulrich, Johannes Grubenmann, and others. Thefirst engineering book on building bridges was written by Hubert Gautier in 1716.

With the Industrial Revolution in the 19th century, truss systems of wrought iron were developed for larger bridges, but iron did not have thetensile strength to support large loads. With the advent of steel, which hasa high tensile strength, much larger bridges were built, many using theideas of Gustave Eiffel.

Etymology

This Y-shaped bridge in Zanesville, Ohio, United States is the only one of its kind except for the older Margaret Bridge.

http://www.essential-architecture.com/TYPE/Y_bridge.jpg

7/30/2019 Bridg Se

10/28

The Oxford English Dictionary traces the origin of the word bridge to anOld English word brycg, of the same meaning, derived from ahypothetical Proto-Germanic root brugj. There are cognates in other Germanic languages (for instance Brcke in German, brug in Dutch, brgvin Faroese or bro in Danish, Norwegian and Swedish).

Tower Bridge , LondonAnother theory suggests that "bridge" comes from Turkish "kpr" (lit.

bridge). It is highly possible that Turkish lent this word to EasternEuropean languages and then, in time, it arrived in English. "Kpr" itself is derived from "kprk (kpk)" which literally means "foam". The wordfor the Pope, pontiff, comes from the Latin word pontifex meaning "bridge

builder" or simply just "builder". The word "Pope" however comes from"papa" meaning "father".

Millenium Footbridge , London

Types of bridges

http://www.london-architecture.info/LO-043.htmhttp://www.london-architecture.info/LO-061.htmhttp://www.london-architecture.info/LO-061.htmhttp://www.london-architecture.info/LO-043.htmhttp://www.london-architecture.info/LO-043.htmhttp://www.london-architecture.info/LO-061.htm

7/30/2019 Bridg Se

11/28

Charles Bridge in Prague.

There are six main types of bridges: beam bridges, cantilever bridges, arch bridges, suspension bridges, cable-stayed bridges and truss bridges.

By useA bridge is designed for trains, pedestrian or road traffic, a pipeline or waterway for water transport or barge traffic. In some cases there may berestrictions in use. For example, it may be a bridge carrying a highway andforbidden for pedestrians and bicycles, or a pedestrian bridge, possiblyalso for bicycles. A Road-rail bridge carries both road and rail traffic.The area underneath several bridges have become makeshift shelters andhomes to homeless people.The undersides of bridges all around the world are spots of prevalentgraffiti.An aqueduct is a bridge that carries water, resembling a viaduct, which isa bridge that connects points of equal height.An unintended consequential use of a bridge is as a suicide bridge.

7/30/2019 Bridg Se

12/28

New Year's Eve on Sydney Harbour Bridge , Sydney, Australia.

Decorative or ceremonialTo create a beautiful image, some bridges are built much taller thannecessary. This type, often found in east-Asian style gardens, is called aMoon bridge, evoking a rising full moon.

Other garden bridges may cross only a dry bed of stream washed pebbles,

intended only to convey an impression of a stream.

Often in palaces a bridge will be built over an artificial waterway assymbolic of a passage to an important place or state of mind. A set of five

bridges cross a sinuous waterway in an important courtyard of TheForbidden City in Beijing , the People's Republic of China. The central

bridge was reserved exclusively for the use of the Emperor, Empress, andtheir attendants.

Lugou Bridge (Marco Polo Bridge) near Beijing

http://www.sydneyarchitecture.com/ROC/QUA02.htmhttp://www.sydneyarchitecture.com/ROC/QUA02.htmhttp://www.chinese-architecture.info/PEKING/PE-005.htmhttp://www.chinese-architecture.info/PEKING/PE-005.htmhttp://www.chinese-architecture.info/PEKING/PE.htmhttp://www.chinese-architecture.info/PEKING/PE-018.htmhttp://www.chinese-architecture.info/PEKING/PE-018.htmhttp://www.sydneyarchitecture.com/ROC/QUA02.htmhttp://www.sydneyarchitecture.com/ROC/QUA02.htmhttp://www.chinese-architecture.info/PEKING/PE-005.htmhttp://www.chinese-architecture.info/PEKING/PE-005.htmhttp://www.chinese-architecture.info/PEKING/PE.htmhttp://www.chinese-architecture.info/PEKING/PE-018.htm

7/30/2019 Bridg Se

13/28

Puente Romano , Cordoba, Spain

Ponte Vecchio , Florence, Italy

Structural and evolutionary taxonomy

http://www.spanish-architecture.info/SP-CO/CO-003.htmhttp://www.spanish-architecture.info/SP-CO/CO-003.htmhttp://www.italian-architecture.info/FL/FL-007.htmhttp://www.italian-architecture.info/FL/FL-007.htmhttp://www.essential-architecture.com/TYPE/BridgeTaxonomyBW.pnghttp://www.italian-architecture.info/FL/FL-007.htmhttp://www.spanish-architecture.info/SP-CO/CO-003.htmhttp://www.spanish-architecture.info/SP-CO/CO-003.htmhttp://www.italian-architecture.info/FL/FL-007.htm

7/30/2019 Bridg Se

14/28

A bridge taxonomy showing evolutionary relationships.

Bridges may be classified by how the four forces of tension, compression, bending and shear are distributed through their structure. Most bridgeswill employ all of the principal forces to some degree, but only a few will

predominate. The separation of forces may be quite clear. In a suspensionor cable-stayed span, the elements in tension are distinct in shape and placement. In other cases the forces may be distributed among a largenumber of members, as in a truss, or not clearly discernible to a casualobserver as in a box beam. Bridges can also be classified by their lineage,which is shown as the vertical axis on the diagram to the right.

EfficiencyA bridge's structural efficiency may be considered to be the ratio of loadcarried to bridge weight, given a specific set of material types. In onecommon challenge students are divided into groups and given a quantity

of wood sticks, a distance to span, and glue, and then asked to construct a bridge that will be tested to destruction by the progressive addition of loadat the center of the span. The bridge taking the greatest load is by this testthe most structurally efficient. A more refined measure for this exercise isto weigh the completed bridge rather than measure against a fixed quantityof materials provided and determine the multiple of this weight that the

bridge can carry, a test that emphasizes economy of materials and efficientglue joints (see balsa wood bridge).

A bridge's economic efficiency will be site and traffic dependent, the ratioof savings by having a bridge (instead of, for example, a ferry, or a longer road route) compared to its cost. The lifetime cost is composed of materials, labor, machinery, engineering, cost of money, insurance,maintenance, refurbishment, and ultimately, demolition and associateddisposal, recycling, and replacement, less the value of scrap and reuse of components. Bridges employing only compression are relativelyinefficient structurally, but may be highly cost efficient where suitablematerials are available near the site and the cost of labor is low. For medium spans, trusses or box beams are usually most economical, whilein some cases, the appearance of the bridge may be more important thanits cost efficiency. The longest spans usually require suspension bridges.

Special installationsSome bridges carry special installations such as the tower of Nov Most

bridge in Bratislava which carries a restaurant. On other suspension bridgetowers transmission antennas are installed.

A bridge can carry overhead power lines as the Storstrm Bridge.

Visual index

7/30/2019 Bridg Se

15/28

Arch bridge (Nagasaki Meganebashi, Japan ).

Beam bridge

Box girder bridge

Cable-stayed bridge

http://www.essential-architecture.com/TYPE/ThreeTwrBrCenter.jpghttp://www.essential-architecture.com/TYPE/Concrete_box_girder_bridge.jpghttp://www.essential-architecture.com/TYPE/Small_footbridge.jpghttp://www.essential-architecture.com/TYPE/NagasakiMeganebashi.jpg

7/30/2019 Bridg Se

16/28

Cantilever bridge (Forth Bridge Edinburgh ).

Cantilever spar cable-stayed bridge (Puente del Alamillo ).

Clapper bridge (Tarr Steps).

http://www.essential-architecture.com/TYPE/800px-Tarr_Steps_01.jpghttp://www.essential-architecture.com/TYPE/Puente_del_Alamillo.jpghttp://www.essential-architecture.com/TYPE/ForthBridgeEdinburgh.jpg

7/30/2019 Bridg Se

17/28

Compression arch suspended-deck bridge ( Sydney Harbour Bridge ).

Girder bridge

Log bridge

http://www.sydneyarchitecture.com/ROC/QUA02.htmhttp://www.essential-architecture.com/TYPE/Vallorcine_footpath.jpghttp://www.essential-architecture.com/TYPE/GirderBridge2.jpghttp://www.essential-architecture.com/TYPE/Australia_sydney-404.jpghttp://www.sydneyarchitecture.com/ROC/QUA02.htm

7/30/2019 Bridg Se

18/28

Moveable bridge (Salmon Bay Bridge).

Plate girder bridge

Pontoon bridge (Rhine River 1945).

http://www.essential-architecture.com/TYPE/Pontoon_bridge_Rhine_River_1945.jpghttp://www.essential-architecture.com/TYPE/PlateGirderUnderTracks.jpghttp://www.essential-architecture.com/TYPE/Salmon_Bay_Bridge-2Clip.jpg

7/30/2019 Bridg Se

19/28

Segmental bridge (Ft Lauderdale, Texas).

Self-anchored suspension bridge (Proposed SFOBB Eastern Span).

Side-spar cable-stayed bridge (Winnepeg Bridge).

http://www.essential-architecture.com/TYPE/WinnepegBridge.jpghttp://www.essential-architecture.com/TYPE/ProposedSFOBBEasternSpan.jpghttp://www.essential-architecture.com/TYPE/SegmentalBridgeFtLauderdale.jpg

7/30/2019 Bridg Se

20/28

Simple suspension bridge (Capilano Bridge).

Step-stone bridge ( ).

Stressed ribbon bridge (Essing, Germany).

http://www.essential-architecture.com/TYPE/Holzbruecke_bei_Essing_1.jpghttp://www.essential-architecture.com/TYPE/StepStoneBridge.jpghttp://www.essential-architecture.com/TYPE/CapilanoBridge.jpg

7/30/2019 Bridg Se

21/28

Suspension bridge (Bristol, UK).

Trestle (Alhambra Trestle).

http://www.essential-architecture.com/TYPE/AlhambraTrestle.jpghttp://www.essential-architecture.com/TYPE/Suspension_bridge_bristol_arp_750pix.jpg

7/30/2019 Bridg Se

22/28

Truss arch bridge (Eastbound over SCB).

Truss bridge (Little Manatee River).

http://www.essential-architecture.com/TYPE/LittleManateeRiver.jpghttp://www.essential-architecture.com/TYPE/Eastbound_over_SCB.jpg

7/30/2019 Bridg Se

23/28

Tubular bridge (Conwy Castle).

Aqueduct (Pont du gard, France).

Bailey bridge (France).

http://www.essential-architecture.com/TYPE/PontBailey.jpghttp://www.essential-architecture.com/TYPE/Pont_du_gard.jpghttp://www.essential-architecture.com/TYPE/Conwy_Castle_2.jpg

7/30/2019 Bridg Se

24/28

Bridge of boats (WWI Scheld).

Covered bridge (Guilford Vermont).

Lattice truss (Guilford Vermont interior).

http://www.essential-architecture.com/TYPE/Guilford_vermont_bridge_covered_bridge_interior.jpghttp://www.essential-architecture.com/TYPE/Guilford_vermont_covered_bridge_20040820.jpghttp://www.essential-architecture.com/TYPE/WWI_bridge_of_boats_Scheldt.jpg

7/30/2019 Bridg Se

25/28

Double decker bridge (Vorobyovy Gory metro station Moscow).

Inca rope bridge

http://www.essential-architecture.com/TYPE/IRBSideViewClip.jpghttp://www.essential-architecture.com/TYPE/Vorobyovy_Gory_metro_station.jpg

7/30/2019 Bridg Se

26/28

Lattice girder (laced strut or tie) (SF Oak BB).

Medium Girder Bridge (Mosul, Iraq).

http://www.essential-architecture.com/TYPE/16_Bay_With_Link_4.jpghttp://www.essential-architecture.com/TYPE/SFOakBBLaticeBeamsClose.jpg

7/30/2019 Bridg Se

27/28

Moon bridge

Packhorse bridge (Marsden, West Yorkshire, UK).

Water bridge (Dundas aqueduct).

http://www.essential-architecture.com/TYPE/Dundas_aqueduct.jpghttp://www.essential-architecture.com/TYPE/Packhorse_bridge_in_Marsden_West_Yorkshire.jpghttp://www.essential-architecture.com/TYPE/SFTGMoonBridge.jpg

7/30/2019 Bridg Se

28/28

Weigh bridge

Viaduct (Toronto bloorviaduct).

Links

http://www.essential-architecture.com/TYPE/Toronto-bloorviaduct.jpghttp://www.essential-architecture.com/TYPE/WeighBridge5500.jpg