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Bridges from all over the World!. By: Maria Peloro & Christine Sniffen Bridges powerpoint project 2 nd period science. Historical Facts.

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bridges from all over the world

Bridges from all over the World!

By: Maria Peloro & Christine Sniffen

Bridges powerpoint project

2nd period science

historical facts
Historical Facts
  • The very first bridge were in fact created by nature. If a tree fell over a large ditch, people and animals could easily cross without having to travel longer.
historical facts1
Historical facts
  • The second bridges were made by humans and were probably spans of wooden logs or planks and eventually stones, using a simple support and crossbeam araangement.
historical facts2
Historical facts
  • The first man-made bridges were made out of wood, used to get over small streams. Sooner or later they found out that they can get across longer streams by adding more supports.
historical facts3
Historical facts
  • In the beginning of the Middle Ages a little bit more proggress in bridge engineering began. The Gothic Arch was used, and it was a lot easier to construct because there was less load on the wooden centering while being built.
type of bridge structure
Type of Bridge Structure
  • Beam bridge

Beam Bridges are the simplest type of bridge today.

They are the direct descendent from the log bridge. It

is used often in pedestrian bridges and for

highway overpasses. Beam bridges are made of

one horizontal beam with two supports usually on

either end. Theses free standing bridges are usually

built as a walkway or even for decoration.

types of bridge structures
Types of bridge structures
  • Cantiveler Bridge

A cantilever bridge is a bridge built

using cantivelers, structures that project horizontally

into space, supported on only one end. For small

footbridges,the cantilevers may be simple beams; however,

large cantilever bridges designed to handle road or rail

traffic use trusses built from stuctual steel, or box girders

built from prestressed concrete.

types of bridge structures1
Types of bridge structures
  • Arch Bridge

An arch bridge is a bridge with abutments at each end

shaped as a curved arch. Arch bridges work by

transferring the weight of the bridge and its loads

partially into a horizontal thrust restrained by the

abutments at either side.

types of bridge structures2
Types of Bridge Structures
  • Suspension Bridges

A suspension bridge is any type of bridge that makes

significant use of tension rather than or in addition to

compression. A suspension bridge usually has cables

(else ropes or chains), anchored at each end of the

bridge. Any load applied to the bridge is transformed

into a tension in these main cables

types of bridge structures3
Types of Bridge Structures
  • Truss Bridges

A truss bridge is a bridge composed of connected

elements (typically straight) which may be stressed

from tension, compression, or sometimes both in

response to dynamic loads. Truss bridges are one of

the oldest types of modern bridges. A truss bridge is

economical to construct owing to its efficient use of


bridges that currently exist
Bridges that currently exist
  • Verezzano Bridge

The Verrazano-Narrows Bridge is a double-decked

suspension bridge that connects the boroughs of

Staten Island and Brooklyn on Long Island in New

York City. The bridge is named after an Italian explorer

named Giovanni de Verezzano, the first known European

navigator to enter New York and the Hudson River, while

crossing The narrows...

continue for more info

verezzano bridge continue
Verezzano Bridge continue...

Official Name: Verezzano- Narrow Bridge

Carries: 12 total lanes (6 lanes upper and 6 lanes lower) of I-278

Locale: New York City (Staten Island –Brooklyn)

Vertical Clearence:

15 feet- 4.6meters (the upper level)

14.4 feet- 4.4 meters (the lower level)

Opening Date:

November 21, 1964 (the upper level)

June 28, 1969 (the lower level)

Toll: $10.00 as of 16 March 2008, discount available with E-Z Pass

bridges that currently exist1
Bridges that currently exist
  • The Golden Gate

The Golden Gate Bridge is a suspenision bridge spanning the

Golden Gate, the opening of the San Francisco Bay onto the

Pacific Ocean. As part of both U.S. Route 101and State Route1, it

connects the city of San Francisco on the northern tip of

the San Francisco Penninsula to Marin County. The Golden

Gate Bridge was the Longest suspension bridge span in the world

when it was completed during the year 1937, and has become

an internationally recognized symbol of San Francisco and also


golden gate continue
Golden Gate Continue...

Official name: The Golden Gate

Carries: 6 lanes US 101/ SR1, pedestrians and bicycles.

Locale: San Francisco, California and Marin County, California

Total Length: 8,981 Feet 2,737 meters

Width: 90 feet

Height: 746 feet

Opening date: May 27, 1937

Toll: $6.00 (southbound) (US $5.00 with Fas Trak

bridges that currently exist2
Bridges that currently exist...
  • The London Bridge

London Bridge is a bridge between the City of London and

Southwark in London, England, over the Thames River. On

The south side of the bridge are Southwark Cathedral and

London Bridge Station; on the north side are the Monument

to the Great Fire of London and Monument Tube Station.

london bridge continue
London Bridge Continue...

Official name: London Bridge

Locale: Inner London

Carries: 5 lanes

Crosses: Thames River

Longest Span: 104 Meters- 340 feer

Total Length: 262 meters-860 feet

Clearence Below: 8.9 meters-29 feet

Opening Date: March 17, 1973