1. SAN FRANCISCOS GOLDEN GATE BRIDGE CONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGESUCHI.TANNA_0827_4TH YEAR

2. SUSPENSION BRIDGEA suspension bridge is defined to be as a bridge in which the load bearing portion named as deck is hung belowby suspension cables on vertical suspendersSuspension bridges in their simplest form were originally made from rope and wood.Modern suspension bridges use a box section roadway supported by high tensile strength cables.In the early nineteenth century, suspension bridges used iron chains for cables.The cables are made of thousands of individual steel wires bound tightly together.STEEL- BEACAUSE ITS STRONG UNDER TENSIONCONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGE SUCHI.TANNA_0827_4TH YEAR 3. SUSPENSION BRIDGESuspension bridges tend to be the most expensive to build.A suspension bridge suspends the roadway from huge main cables, which extend from one end of the bridge tothe other. These cables rest on top of high towers and have to be securely anchored into the bank at either endof the bridge.The towers enable the main cables to be draped over long distances.Most of the weight or load of the bridge is transferred by the cables to the anchorage systems. These areimbedded in either solid rock or huge concrete blocks.Inside the anchorages, the cables are spread over a large area to evenly distribute the load and to prevent thecables from breaking free. CONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGESUCHI.TANNA_0827_4TH YEAR 4. SAN FRANCISCOS GOLDEN GATE BRIDGEThe Golden Gate Bridge in San Francisco, California is one of themost beautiful bridge in the world.Linking San Francisco with Marin County the Golden Gate Bridgeis a 1.7 mile-long suspension bridge that can be crossed by car,on bicycles or on footThere are parking and viewingTotal length: Including approaches, 1.7 milesMiddle span: 4,200 feet (1,966 m).Width: 90 feet (27 m)Clearance above the high water (average): 220 feet (67 m)Towers: 746 feet (227 m) above the water 500 feet (152 m) above the roadway Each leg is 33 x 54 feet (10 x 16 m) Towers weigh 44,000 tons each (40,200,000 kg). There are about 600,000 rivets in EACH tower. CONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGESUCHI.TANNA_0827_4TH YEAR 5. CONSTRUCTION- DESIGNSteel Facts:Total weight of steel: 83,000 tons Cable Facts: Two main cables pass over the tops of the main towers and are secured in concrete anchorages at each end. Each cable is made of 27,572 strands of wire. There are 80,000 miles (129,000 km) of wire in the two main cables, and it took over six months to spin themLights:128 lights are installed on the bridge roadway.AESTHETICSThe Golden Gate Bridge design echoes an Art Deco Theme. Wide, verticalribbing on the horizontal tower bracing accents the suns light on the bridge.The color of the bridge is officially an orange vermillion calledinternational orangeThe color was selected because it complements the natural surroundings andenhances the bridges visibility in fogCONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGE SUCHI.TANNA_0827_4TH YEAR 6. WALKING ACROSS VIEW PORT OF NORTHTHE BRIDGE ENDS HOWING LANESCONSTRUCTION_BRIDGES_GOLDEN GATE BRIDGEAND TRAFFICSUCHI.TANNA_0827_4TH YEAR