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A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. Designs may be built higher than otherwise needed in order to allow other traffic (particularly ship traffic) beneath.

The purpose of a bridge is to allow people travelling or cargo being transported easier passage by providing a more uniform, and more easily navigable route than what would otherwise be an uneven or impossible path.

History


The first bridges were spans made of wooden logs or planks and eventually stones, using a simple support and crossbeam arrangement.

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Bridge Construction :: Civil and Roadworks
Buildings and Bridges :: Technology

 
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NYT > Technology

Industry Rethinks Moneymaking Software Practice
Thu, 28 Aug 2008 05:00:32 -0000
Before they ship PCs to retailers like Best Buy, computer makers get paid hundreds of millions of dollars to load them up with lots of free software. For $30, Best Buy will get rid of it for you.
Basics: For the Advanced in Age, Easy-to-Use Technology
Thu, 28 Aug 2008 05:17:29 -0000
The companies that are successfully marketing new technologies to older people are the ones that have learned to create products that span generations, providing style and utility to a range of age groups.
Phone Smart: Freeing Those Snapshots Trapped Inside the Cellphone
Thu, 28 Aug 2008 05:18:19 -0000
Carriers and device manufacturers have only lately figured out that users need a single button that says, “Send my new photo now.”
A U.S.B. Cable for Splitting Screens and Sharing Files Between Two Computers
Thu, 28 Aug 2008 05:24:58 -0000
Iogear’s new U.S.B. Laptop K.V.M. Switch, a double-ended cable that connects two Windows PCs or laptops together, lets you use one PC to control the other and even drag files between the machines.
A Mouse to Aid Warriors in Their Arena of Choice
Thu, 28 Aug 2008 05:23:21 -0000
Made with the needs of videogame fans in mind, the Avatar mouse from NZXT comes with seven programmable buttons that can be custom-configured for different types of games.
Give Yourself or Others a New Look, Digitally
Thu, 28 Aug 2008 04:47:47 -0000
Combining a graphics tablet with a built-in camera and a computer-based set of creativity tools, Stylin’ Studio is the latest thing in face-editing technology.

NerdTV | PBS

NerdTV #13: Judy Estrin
Mon, 10 Apr 2006 12:00:00 -0700
Judy Estrin's career ranges from founder of Bridge Communications to CTO of Cisco to running Packet Design LLC. Quite the girl geek, eh?Download video:Entire Show:MPEG-4 | TorrentNerdy Bit:MPEG-4 | TorrentJuicy Bit:MPEG-4 | TorrentDownload subtitled video:Entire Show:With Subtitles | Torrent w/ SubtitlesNerdy Bit:With Subtitles | Torrent w/ SubtitlesJuicy Bit:With Subtitles | Torrent w/ SubtitlesDownload audio:Entire Show:MP3 | TorrentAAC | TorrentOgg Vorbis | Torrent
NerdTV #13: Judy Estrin - Transcript
Mon, 10 Apr 2006 12:00:00 -0700
For those who would rather read than watch or listen.
NerdTV Archives
Mon, 10 Apr 2006 12:00:00 -0700
Miss a past show? Check out our archives.Past guests include:#12: Bob KahnInventor of TCP/IP.#11: Doug EngelbartComputer mouse inventor.#10: Dan BricklinInventor of the Spreadsheet#9: AninaHigh Fashion Meets High Tech#8: Avram MillerCo-founder of Intel Capital#7: Dan DrakeCo-founder of Autodesk#6: Dave WinerFather of RSS and Web Logging#5: Tim O'ReillyOpen Source pioneer#4: Brewster KahleInternet Archive founder#3: Bill JoyCo-founder of Sun#2: Max LevchinCo-founder of PayPal#1: Andy HertzfeldThe first Macintosh programmer...ever

Reuters: Technology News

Sony CEO thinking over Ericsson joint venture: report
Wed, 27 Aug 2008 18:35:46 -0400
FRANKFURT (Reuters) - Sony's joint venture with cell phone maker Ericsson must do better, Sony's chief executive was quoted as saying by a German newspaper on Wednesday.
Mystery Chinese iPhone worker becomes Internet star
Thu, 28 Aug 2008 01:40:56 -0400
CANBERRA, (Reuters) - A Chinese factory worker has become an Internet sensation after a picture of her smiling and flashing a peace sign to a co-worker testing an Apple iPhone stayed on the phone that was sold to a man in Britain.
Microsoft releases beta 2 of Internet Explorer 8
Thu, 28 Aug 2008 01:21:03 -0400
SEATTLE (Reuters) - Microsoft Corp released on Wednesday a second test version of Internet Explorer 8, delivering a feature-complete upgrade to the world's most widely used Web browser.

AP Top Technology News At 7:17 p.m. EDT

One small hitch for FAA, one giant mess for fliers
By MICHAEL TARM Wed, 27 Aug 2008 21:26:28 -0000
CHICAGO (AP) -- When a computer system that distributes flight plans nationwide came rolling to a halt this week because of a software glitch, so did airplanes on tarmacs from Orlando to Chicago. The ensuing delays drove home just how easily an apparently isolated problem can trigger network-wide disarray in the country's aging air traffic control system....
Consumers picked to test hydrogen car prototypes
By KEN THOMAS Wed, 27 Aug 2008 21:23:06 -0000
WASHINGTON (AP) -- Tom Albert drove his loaner Chevrolet Equinox like any other car....
Microsoft's newest browser may block ads
By JESSICA MINTZ Thu, 28 Aug 2008 06:13:37 -0000
SEATTLE (AP) -- The next version of Microsoft Corp.'s Web browser makes it easier for people to surf the Internet without leaving a trace....

 
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Arizona Department of Transportation Bridge Group - Responsible for bridge design, construction assistance, and management. Includes guidelines, preservation program, structural detail cad drawings, and a gallery of bridges.
Meta Description: [ The Arizona Transportation (ADOT) Internet Web site ]

Balanced Cantilever Bridge Construction - Discussion of construction method with a video animation.

Bridge and Structures Office - Washington State Department of Transport - Provides a range of structural services required to provide safe, economical and reliable structures for the state's transportation system. Features projects, maps, and data.
Meta Description: [ Home of Washington States Bridge and Structures. Building tomorrows bridges, today. ]

404 Bridge Building - Online exhibition of bridge building at the Deutsches Museum, Munich. Covers arch, beam, and suspension and cable-stayed bridges.

Bridge Building - Art and Science - Illustrated pages on different types of bridges and how they work.
Meta Description: [ Information about bridges ]

Bridge Design and Assessment - Workshop for bridge design and assessment codes and standards.
Meta Description: [ Workshop for Bridge Design and Assessment Codes and Standards. ]

Bridge Design Manual - Manual developed to provide bridge designers working on Texas Department of Transportation projects with the policies and guidelines set forth by regarding the design of bridges. Also available in pdf format.
Meta Description: [ We are moving away from our current method of presenting manuals online to a more user-friendly format. Our new system, with search functionality, should be up by the end of summer. In the interim, you can access PDFs of the manuals from the links below. ]

Bridge Engineering Forum at Eng-Tips - Technical support and mutual help system for engineering professionals.

Bridge Research: Leading the Way to the Future - Article that discusses the role and value of research in highway bridges.

BridgePros - Offers an interactive experience in the engineering and construction of past, current and future bridge projects, including employment, news updates, and learning center.
Meta Description: [ This site offers an interactive experience in the engineering and construction of past, current and future bridge projects, including employment, news updates, and learning center. ]

Center for Innovative Bridge Engineering - Serves as a resource for highway and railroad bridge owners in the United States and worldwide. Features researchers, projects, education, and news and events. At the University of Delaware.

Design of Steel Bridges (1915) - Historical text detailing the design of steel bridges authored by F. C. Kunz. Provided by the Case Western Reserver University Preservation Department.

How Stuff Works: Beam, Arch and Suspension Bridges - Clear, concise explanations for various types of bridges with many illustrations and related links.
Meta Description: [ Bridges support tremendous weight, span huge distances and all the while withstand the greatest forces of nature. Find out about these engineering feats (as well as some of the flaws). ]

International Bridge Conference - Arena for the bridge industry in North America, Europe and Asia. Includes registration, call for papers, bridge awards, and conference archives. Organized by the Engineers Society of Western Pensylvania.

Issues Impacting Bridge Painting - Overview of research on painting of steel bridges. Uses life cycle costing.

Load and Resistance Factor Design - Technical support, information and news on the AASHTO LRFD bridge design specifications.

Mark Ketchum's Bridge Engineering Page - Photos and descriptions of some bridge structures and some discussion of bridge engineering issues.
Meta Description: [ Photos and descriptions of some bridge structures on which I have worked, some other interesting bridges, and some discussion of bridge engineering issues. ]

500 NOVA Online: Super Bridge - Information about the four major types of bridges. Offers a knowledge test by matching each bridge to the correct location.
Meta Description: [ NOVA Online presents Super Bridge; learn about the four major types of bridges, and then test your knowledge. ]

Office of Bridge Administration - U.S.Coast Guard - Responsible for approval of the location and plans of bridges and causeways constructed across navigable waters of the United States. Provides bridge clearance and permit application guides.

Office of Bridge Design - Georgia Department of Transport - Includes a bridge design guide and information on new and historic bridges in Georgia.
Meta Description: [ Information about the Georgia Department of Transportation's Bridge Design Office, Georgia Department of Transportation. Where to find information on Georgia Department of Transportation ]

Office of Bridge Technology - Federal Highway Association - Provides a range of technical data on concrete and steel structures. Features publications, calendar of events, and related links.

Office of Structural Engineering - Ohio Department of Transport - Includes bridge design manual, standard drawings, research, hydraulics, and covered bridges.

SC Solutions - Bridge engineering resources. Links to government agencies, universities, publications and software.
Meta Description: [ Bridge Engineering Home Page ]

The Bridges Project - London Borough of Barking and Dagenham - Provides theoretical knowledge for students and teachers, with illustrations from places in both London's Docklands and the Netherlands.

The BridgeSite - Resources for bridge engineers including engineering tools, discussion groups, and an industry events calendar.
Meta Description: [ The bridge site - a free site for all bridge engineering interests ]

The Hong Kong Polytechnic University - Provides a range of technical data and case studies on arch, beam, cable-stayed, and suspension bridges.

The West Point Bridge Design Contest - Annual competition sponsored by the American Society of Civil Engineers. Includes free software download.
Meta Description: [ Design a truss bridge using the award-winning West Point Bridge Designer software. Win a $15,000 scholarship and a laptop computer. It's free! ]

To Build a Twisted Bridge - Gives a topological study of how a Moebius band may adapted for bridge construction. Gives examples of some potentially usable designs for people and cars.

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