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QUADRATIC
S IN R
EAL LIFE
TH
E G
OL D
EN
GA
TE
BR
I DG
E
GOLDEN GATE BRIDGE HISTORY
The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the opening of the San Francisco Bay into the Pacific Ocean. As part of both U.S. Route 101 and California State Route 1, the structure links the city of San Francisco, on the northern tip of the San Francisco Peninsula, to Marin County. It is one of the most internationally recognized symbols of San Francisco, California, and of the United States. It has been declared one of the modern Wonders of the World by the American Society of Civil Engineers. The Frommers travel guide considers the Golden Gate Bridge "possibly the most beautiful, certainly the most photographed, bridge in the world".
GOLDEN GATE BRIDGE DIMENSIONS
Total length of Bridge including approaches from abutment to abutment: 1.7 miles = 8,981 ft = 2,737 m
Total length of Bridge including approaches from abutment to abutment, plus the distance to the Toll Plaza: 9,150 ft = 2,788 m
Length of suspension span including main span and side spans: 1.2 miles = 6,450 ft = 1,966 m
Length of main span portion of suspended structure (distance between towers): 4,200 ft = 1,280 m
GOLDEN GATE BRIDGE DIMENSIONS CONTINUEDLength of one side span: 1,125 ft = 343 m
Width of Bridge: 90 ft = 27 m
Width of roadway between curbs: 62 ft = 19 m
Width of sidewalk: 10 ft = 3 m
GOLDEN GATE BRIDGE DIMENSIONS CONTINUEDClearance above mean higher high water: 220 ft = 67 m
Total weight of each anchorage: 60,000 tons = 54,400,000 kg
Original combined weight of Bridge, anchorages, and approaches: 894,500 tons = 811,500,000 kg
Total weight of Bridge, anchorages, and approaches (1937): 894,500 tons = 811,500,000 kg
Total weight of Bridge, anchorages, and approaches (1986)*: 887,000 tons = 804,700,00 kg*
Weight of Bridge, excluding anchorages and approaches, and including the suspended structure, main towers, piers and fenders, bottom lateral system and orthotropic redecking (1986): 419,800 tons = 380,800,000 kg
Y=.0001134X^2
FOLLOW UP QUESTIONS
1) The Parabola got wider by a factor of .0001134
2) No maximum, but has a minimum of 0. The graph doesn’t extend forever.
3) The axis of symmetry is 0 and the axis of symmetry is a line that runs down the middle and splits the parabola into two perfect halves.
4) If I more the graph right one unit it the new equation would be Y=0.0001134X^2+1
5) The Golden Arches at McDonalds
WEBSITES USED
Http://www.goldengatebridge.org/research/factsGGBDesign.php
http://en.wikipedia.org/wiki/Golden_Gate_Bridge
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