How long golden gate

Fog added to the difficulties in building the Golden Gate Bridge Photo credit: radkol, Depositphotos. The answer is a 4 years. Construction began in January 0f and was open to automobile traffic in May of Today the Golden Gate Bridge is known around the world. It acts as a symbol of San Francisco, the City by the Bay. About , cars pass over the bridge every day! For years, building the Golden Gate Bridge seemed impossible. Got a Star Wars fan or comics lover in the family?

Then, take a look at the best attractions in San Francisco according to TripAdvisor. Lombard Street in San Francisco, the crookedest street in the world Photo credit: kwiktor, Depositphotos. A great hotel is a must for your San Francisco vacation! For a charming hotel with a French accent in the heart of San Francisco, read our review of Hotel de Cornell.

Or, take a peek at the best hotels in San Francisco. San Francisco is one of the best destinations in California. Discover other fabulous California vacation destinations now! Do you love learning facts about the world? Test your global knowledge with the questions below. Which country outside North America is closest the United States? Where was apple pie invented?

What was the first state in the USA? What is the only city in the continental U. Take a look at additional travel trivia questions! Want to stump your friends with this travel trivia question? Be sure to save this information about how long it took to build the Golden Gate Bridge. Simply pin the image above to Pinterest.

Have you ever seen the Golden Gate Bridge in-person? Tell us about your experience in the comments below! As the author of her book, "The Travel Mamas' Guide," she teaches parents not only how to survive a trip with children, but also how to love exploring the world with their offspring. Colleen gives tips on television, radio, and as a public speaker. She lives in Arizona with her husband and two kids. My whole family is filled with trivia nuts so I love researching and writing these trivia questions.

Glad you enjoyed! The Golden Gate bridge is pretty spectacular!! It is so fun driving across or walking across it. This was such a great read! I never really knew anything about it, though. Its such a beautiful bridge and one of my favorite!

I love the color and am glad they stuck with orange. The Golden Gate Bridge has two main cables which pass over the tops of the two ft-tall towers and are secured at either end in giant anchorages.

The galvanized carbon steel wire comprising each main cable was laid by spinning the wire, using a loom-type shuttle that moved back and forth as it laid the wire in place to form the cables.

The spinning of the main cable wires was completed in 6 months and 9 days. The main cables rest on top of the foot main towers in huge steel castings called saddles. Length of one main cable is 7, ft 2, m. Total length of galvanized steel wire used in both main cables is 80, mi , km. Number of galvanized steel wires in one main cable that are 0. Number of bundles or strands of galvanized steel wire in one main cable is Average number of galvanized steel wires in each of the 61 bundles is Weight of both main cables , suspender cables, and accessories is 24, tons 22,, kg.

The galvanized steel wire used for the main cables is carbon steel with the following average chemical composition and physical properties:. Main Cable bands are located every 50 feet along the main cables and the vertical suspender ropes are hung from the cable bands.

Following the addition of the lower lateral bracing system in and , it was found that the normal working of the Bridge, along with the addition of the lower lateral bracing system, had caused the main cable band bolts to lose as much as 50 percent of their specified tension.

In , the main cable bolts were re-tensioned by J. Again in s, during the replacement of vertical suspender ropes, the cable band bolts were again re-tensioned to 90, pounds using a Biach hydraulic bolt tensioner. This work was performed from ironworker floats hung below the cable. Occasional retightening of main cable band bolts is undertaken when necessary based on inspections. The bolts, subject to constant temperature and load changes in the main cable produce minute changes in the cable diameter, and those changes in cable diameter, together with temperature effects on the cable band itself, cause tension in the bolts to relax.

The tension was tested on a random and statistically valid sampling of cable band bolts, and it was determined that a retightening of all cable band bolts was not required at that time. The re-tensioning of the bolts of the main cable tie-downs which not the same as the main cable band bolts were not a part of the Suspender Rope Replacement Project, but it is noteworthy to mention that they were re-tensioned in and for the first time since the Bridge was completed in The cable tie-down castings, located in the massive concrete pylons at the ends of the suspension span, hold the main cables in a fixed position to prevent vertical motion where the suspended span meets the approach viaducts.

Proper functioning of the tie-downs depends on the clamping force of the cable bands, which in turn is dependent on adequate cable band bolt tension.

The attempt to build what would be the first bridge support in the open ocean proved an immense challenge. As a 1,foot trestle extended off the San Francisco side, divers plunged to depths of 90 feet through strong currents to blast away rock and remove detonation debris.

The trestle was damaged when it was struck by a ship in August and again amid a powerful storm late in the year, setting construction back five months. Construction of the Golden Gate Bridge, October The Roebling engineers, who had also worked on the Brooklyn Bridge , had mastered a technique in which individual steel wires were banded together in spools and carried across the length of the bridge on spinning wheels.

Given a year to complete the task, they instead finished in just over six months, having spun more than 25, individual wires into each 7,foot cable. Despite the ongoing hazardous conditions faced by the crew, the construction produced just one casualty through four years. However, the near-spotless safety record was blemished when a scaffold fell and tore through the net in February , resulting in the deaths of 10 workers. The roadway was completed on April 19, , and the bridge officially opened to pedestrians on May 27 of that year.

The following day, President Franklin D. Roosevelt announced that the bridge was open to cars and the rest of the world via White House telegraph. A marvel of modern engineering, the Golden Gate Bridge is 1. Its 4,foot main span between the two towers was the longest for a suspension bridge until , while its foot towers made it the tallest bridge of any type until The Golden Gate Bridge withstood the destructive Loma Prieta earthquake of , and was closed to traffic only three times in its first 75 years due to weather conditions.

Believed to be the most photographed bridge in the world, this landmark was named one of the seven civil engineering wonders of the United States by the American Society of Civil Engineers in But if you see something that doesn't look right, click here to contact us! Subscribe for fascinating stories connecting the past to the present. Since , its granite towers and steel cables have offered a safe and scenic passage to millions of commuters and tourists, trains and bicycles, The 1.