The Tower Bridge: Its History and Construction from the Date of the Earliest Project to the Present Time - London, UK
Posted by: Groundspeak Premium Member Master Mariner
N 51° 30.337 W 000° 04.253
30U E 703273 N 5710122
Quick Description: Tower Bridge is one of the iconic symbols of London and straddles the Thames close to the Tower of London. Over the years, much has been written about this landmark.
Location: London, United Kingdom
Date Posted: 1/4/2012 10:32:22 AM
Waymark Code: WMDEMZ
Published By: Groundspeak Premium Member lumbricus
Views: 8

Long Description:

Amazon description:
"This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. "

Source Amazon


Tower Bridge:
"A visit to Tower Bridge Exhibition clearly explains how the Bridge works and describes its fascinating history. The information below provides a backdrop to help make the most of your visit.


The Need for a New Bridge
London Bridge was originally the only crossing for the Thames. As London grew, so more bridges were added, although these were all built to the west of London Bridge, since the area east of London Bridge had become a busy port. In the 19th century, the East End of London became so densely populated that public need mounted for a new bridge to the east of London Bridge, as journeys for pedestrians and vehicles were being delayed by hours. Finally in 1876, the City of London Corporation, responsible for that part of the Thames, decided the problem could be delayed no longer.

The view today from the high level Walkways has changed dramatically, although there are still signs of the area's amazing history. With the aid of photographs and interactive kiosks, visitors to Tower Bridge Exhibition can gain a greater understanding of how life would have been when the idea of a new bridge was originally conceived.
 

How a Design was Chosen
A huge challenge faced the City of London Corporation - how to build a bridge downstream from London Bridge without disrupting river traffic activities. To generate ideas, the "Special Bridge or Subway Committee" was formed in 1876, and opened the design for the new crossing to public competition.

Over 50 designs were submitted for consideration, some of which are on display at Tower Bridge Exhibition. It wasn't until October 1884 however, that Horace Jones, the City Architect, in collaboration with John Wolfe Barry, offered the chosen design for Tower Bridge as a solution.
 

The Building of the Bridge
It took 8 years, 5 major contractors and the relentless labour of 432 construction workers to build Tower Bridge.

Two massive piers were sunk into the river bed to support the construction and over 11,000 tons of steel provided the framework for the Towers and Walkways. This framework was clad in Cornish granite and Portland stone to protect the underlying steelwork and to give the Bridge a more pleasing appearance.

To learn more about the building of Tower Bridge, the people involved in its construction and why it was needed, visit The Tower Bridge Exhibition where video screenings explain the entire project, including the difficulties faced.
 

How it Works - Then and Now
When it was built, Tower Bridge was the largest and most sophisticated bascule bridge ever completed ("bascule" comes from the French for "see-saw"). These bascules were operated by hydraulics, using steam to power the enormous pumping engines. The energy created was stored in six massive accumulators, as soon as power was required to lift the Bridge, it was always readily available. The accumulators fed the driving engines, which drove the bascules up and down. Despite the complexity of the system, the bascules only took about a minute to raise to their maximum angle of 86 degrees.

Today, the bascules are still operated by hydraulic power, but since 1976 they have been driven by oil and electricity rather than steam. The original pumping engines, accumulators and boilers are now exhibits within the Tower Bridge Exhibition.
Tower Bridge Exhibition - A History

In 1910 the high level Walkways were closed to the public due to lack of use. People arriving on the bridge preferred to wait at street level for it to close rather then heading up the stairs carrying their heavy loads. In 1982, as part of the new Tower Bridge Exhibition, visitors to the bridge could once again enter the walkways, now fully covered, and experience the amazing panoramic views. Although Tower Bridge is now powered by oil and electricity, the original steam engines maintained by a dedicated team of technical officers remain in their original location for all to see. This area is known as the Victorian Engine Rooms, the second section of Tower Bridge Exhibition. Over the past 28 years, the exhibition has been developed to keep pace with modern day needs without losing its Victorian essence. Through interactive kiosks and video walls along with knowledgeable Guides, visitors can learn about key events in the Bridge's history, ranging from Royal visits to dare devil stunts.

Interesting Facts
Tower Bridge has a fascinating history, which is explored in full in The Tower Bridge Exhibition. Here are a few interesting facts you may not have known:

1910 - the high-level walkways, which were designed so that the public could still cross the bridge when it was raised, were closed down due to lack of use.

1912 - during an emergency, Frank McClean had to fly between the bascules and the high-level walkways in his Short biplane, to avoid an accident.

1952 - a London bus driven by Albert Gunton had to leap from one bascule to the other when the bridge began to rise with the number 78 bus still on it.

1977 - Tower Bridge was painted red, white and blue to celebrate the Queen's Silver Jubilee. (Before that, it was painted a chocolate brown colour).

1982 - Tower Bridge opened to the public for the first time since 1910, with a permanent exhibition inside called The Tower Bridge Experience.
"

Source Tower Bridge.

ISBN Number: 13:9781141561469

Author(s): James Edward Tuit

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