Presentation on theme: "The Golden Gate Bridge Presented by: The Third Row Six Presenters:"— Presentation transcript:
1 The Golden Gate Bridge Presented by: The Third Row Six Presenters: Brett Portner-KuhlowScott Tumm
2 Important Dates1920: A feasibility Study recommends construction of the Golden Gate Bridge1923: The State Legislature Passes the Golden Gate Bridge and Highway District Act of California into Law1930: Joseph Strauss, Chief Engineer submits his final plans for the bridgeJanuary 5, 1933: Construction of the bridge begins
3 February 1933: Anchorages are completed June 1935: The towers are completedMarch 1936: The suspension cables are completedApril 1937: The deck surface is completed
4 Official Pedestrian Day: May 27, 1937Bridge opens for traffic:May 28, 1937
5 Spanning the Golden Gate The entrance to San Francisco Bay was named the ‘Golden Gate’ by early settlersOne mile wide gap60 Mph wind tunnel like gusts of wind for much of the year2.5 Million cubic feet of water per second pass through the Golden GateCurrentsEarthquakes
6 Project Management Before the Manhattan Project James Reed General ManagerJoseph StraussChief Engineer
8 Strauss the Man Rude Short-tempered Arrogant Labeled ‘brilliant bully’ by his peers-Strauss thought big. His graduate thesis proposed a 50 mile long bridge across the Bering Strait that would connect Siberia and Alaska.
9 ScopeBuild a bridge spanning the Golden Gate -Must be tall enough for ships to pass underneath
10 TimeThere was no real set timetable; managers ensured the project progressed as quickly as possible.
12 Financial Facts $35 million in bonds $38 million in interest Bridge completely paid off on June 30, 1971Bridge completely paid for by tollsNo state or federal money went into the bridgeBank of America extended a $5 million line of credit to the bridge projectPeople put up their homes, farms and businesses as collateral for the bridge to generate the $35 million in bond issuePresently, bridge still operates only with money collected from tolls
13 To Build a BridgeStrauss spent three years researching his first designHe assembled a team of engineers to create the final designStrauss expected that three dozen workers would die during the construction, about one for every one million dollars spent on the construction11 deaths occurred
14 Black Wednesday: February 17, 1937 A scaffold slipped off the bridge and through the protective netting below, taking ten men to their deaths.
15 Safety Under Strauss 1st Mandatory use of hard hats Issuing of safety belts and tie off linesDizzy riveters: respirators for burning paint fumesRiveters and ironworkers required to wear leather glovesSun goggles, sun-block lotionField hospital at south end staffed full time; treated 12,000 injuries by December, 1935.No deaths for the first 3 years and 8 months of project
16 The Net$120,000 Safety net suspended 60 feet below the road surface: nineteen men saved
17 The ‘Halfway to Hell’ Club Nineteen official members, some jumped for funNamed by tabloids looking for a storyFirst official member hit the ground as well, broke four vertebrae
18 Unexpected Delays and Challenges Temporary trestle knocked over twiceThe ten day San Francisco StrikeFort Point
19 Fort Point Located directly under south end of bridge Historians and the community in general protested to preserve the fort
20 Records held by the Bridge (in 1937) Longest bridgeTallest free standing structure in the world (over 740 feet)
21 Golden Gate Fun FactsRiveting crew held unofficial speed contests; they sometimes threw red-hot rivets distances of 70 feet or more80,000 miles of pencil diameter steel cable in bridgeSteel for the bridge was made in Pennsylvania and ‘shipped’ to California via the Panama Canal$75,000 paid in tolls each dayA gold rivet was hammered into place to celebrate the completion of the bridge‘International Orange’Blind woman and guide dog the first pedestrians ever to cross the bridge1.25 billion cars have crossed bridge since ’37Bridge ‘Firsts’First person to cross on stiltsFirst person to cross sticking tongue out all the wayFirst wooden hat to cross the bridgeEach anchorage weighs as much as 17,000 elephants
22 ReferencesBarter, James. The Golden Gate Bridge. San Diego: Lucent Books, 2001.The Golden Gate Bridge. Narr. Jack Perkins. Videocassette. A&E Home Video, 1994.Strauss, Joseph. The Golden Gate Bridge. San Francisco: Golden Gate Bridge and Highway District, 1938.Van Der Zee, John. The Gate: The True Story of the Design and Construction of the Golden Gate Bridge. New York: Simon and Schuster, 1986.