Bridges+Project

media type="youtube" key="QTypwAkzRzk?hl=es" height="344" width="425"

Bridges: A structure spanning and providing passage over a gap or barrier, such as a river or roadway. What are the benefits of bridges? Some of the benefits of bridges are obvious: supplies of food and traded goods can get across an obstacle or through difficult terrain in a shorter time. Types of bridges: Beam bridges: horizontal beams supported at each end by abutments, hence their structural name of simply supported. When there is more than one span the intermediate supports are known as piers. Cantilever bridges: are built using cantilevers—horizontal beams that are supported on only one end. Most cantilever bridges use a pair of continuous spans extending from opposite sides of the supporting piers, meeting at the center of the obstacle to be crossed. Cantilever bridges are constructed using much the same materials & techniques as beam bridges.

Arch bridges: have abutments at each end. The weight of the bridge is thrust into the abutments at either side.

Suspension bridges: suspended from cables.

Able-stayed bridges: like suspension bridges, are held up by cables. However, in a cable-stayed bridge, less cable is required and the towers holding the cables are proportionately shorter.

Ovable bridges: are designed to move out of the way of boats or other kinds of traffic, which would otherwise be too tall to fit. These are generally electrically powered.

Ouble-decked bridges: have two levels.

By use A bridge is designed for trains, pedestrian or road traffic, a pipeline or waterway for water transport or barge traffic. An aqueduct is a bridge that carries water, resembling a viaduct, which is a bridge that connects points of equal height.A road-rail bridge carries both road and rail traffic. Ahora.. la siguiente parte de la presentacion es un Puente que hayas elegido tu.. voy a usar uno de los de semana 3 que puse arriba. Eiserner Steg Bridge:
 * || [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image019.jpg width="218" height="163"]] ||||  || [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image020.jpg width="205" height="154"]] ||
 * ||^  ||||   ||^   ||   |||| [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image021.jpg width="241" height="149"]] ||
 * ||||  |||||||| [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image022.jpg width="254" height="170"]] ||
 * ||||  |||||||| [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image022.jpg width="254" height="170"]] ||
 * ||||  |||||||| [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image022.jpg width="254" height="170"]] ||
 * ||||  |||||||| [[image:file:///C:/Users/Amparo/AppData/Local/Temp/msohtmlclip1/01/clip_image022.jpg width="254" height="170"]] ||

Title of the presentation: BRIDGES, CONSTRUCTING A WORLD FREE OF GAPS AND BARRIERS. Also known as the Iron Bridge. Its located over the Main, in Frankfurt, Germany. Iron Footbridge (pedestrian bridge) Clinched steel, it also has armor with two props. It was erected as a third bridge across the Main connecting the center of Frankfurt with Sachsenhausen. The bridge was for pedestrian use only as there was no space on the Frankfurt side to build access ramps for a road bridge. ingeniero Pedro Schmick.