alvord lake bridge golden gate park
|
||||||||||||||
|
|
|
|
||||||||||||
|
|
||||||||||||||
Stockphotos.ro (c) 2024. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
alvord lake bridge golden gate park |
||||||||||||||||||||||||||||||||||||||||
| navigate by keyword : alvord lake bridge golden gate park small leading famous haight street feet 20m wide long important engeneering marvel reinforced concrete united state concept building ransome laughed april 1906 buildings city type survived historic earthquake builder steel posts reinforce built 1889 intentionally design inside tunnel look like real cave stalactites structure designed |
||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||
| The small Alvord Lake Bridge,made from reinforced concrete and built in 1889,leading from the famous Haight Street into Golden Gate Park,is only 64 feet (20m) wide by 20 feet (6.1m) long,yet is a highly important engineering marvel. This is when steel posts are added to the concrete to reinforce it. This is the very first reinforced concrete structure in the whole United State,a concept that the builder,R. L. Ransome was laughed at for. That is,until 18 April 1906,when all the buildings in the city of this type were the only ones to survived the historic earthquake. He also intentionally designed the inside of the tunnel part to look like a real cave,with 'real' stalactites. |
||||||||||||||||||||||||||||||||||||||||
|
Stockphotos.ro (c) 2024. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
||||||||||||||||||||||||||||||||||||||||