Golden Gate Bridge | Crazy Engineering behind It

With a crazy design behind it, not only a symbol of San Francisco alone, Golden Gate Bridge is also a symbol of the whole country. It's comparable to the Statue of Liberty, the Empire State Building or Grand Canyon.
What makes the Golden Gate Bridge the symbol of the United States of America?
In this video, we will admire the amazing engineering design of Joseph Strauss. The main contents include:
1/ Analysis of technology selection 1:00
2/ Financial optimization, environmental impact assessment 3:15
3/ Structure of hanging rope 3:41
4/ Construction of road surface 04:00
5/ Design to reduce the impact of expansion due to environment and materials 06:00
6/ Construction of piers 09:40
7/ Construction of main cable 12:30
The Golden Gate Bridge is considered the gateway on the road from the Pacific Ocean to the San Francisco Bay, connecting the city of San Francisco, California in the United States, at the northern tip of the San Francisco peninsula, to Marin County near the town of Sausalito in the south.
The bridge is 2.7 km long, the distance between the spans is 1,280 meters, 67 meters above the water surface, and the two towers are 230 meters high from the water.
Although the idea of a bridge over the Golden Gate had existed before, it was not until 1916 that the idea was pitched in a San Francisco newsletter by Jamse Wilkins, a Design Engineer, then a technician student.
According to estimates by the City's Society of Engineers, it would cost $100 million to build a bridge, which unaffordable at the time. Engineers wondered if they could build a less costly bridge.
One person who gave the answer to the above problem is Joseph Strauss - the chief engineer in charge of the overall design and construction of the project - an engineer with many ambitions and dreams.
In his early drawings Strauss designed an extra-large balustrade on either side of the strait, the two ends of which were connected by a central suspension that, according to Strauss, could be built with 17 million USD.
The local government agreed to build the bridge according to Strauss' ideas on the condition that Strauss revise the design and accept suggestions from project consultants. A design of a suspension bridge is considered the most realistic because it matches the advances in metallurgy of the time.
One can admire the technologies that were developed 89 years ago in the design and construction of the Golden Gate Bridge. This successful project marks a giant leap in civil engineering.