What are the shapes used to build golden gate of California?

Answer 1

Although I am not familiar with the detailed design, I am sure there was many shapes used in the construction of the Golden Gate Bridge, including I beams, box beams, angles and plates. But the most familiar shape is that of the main cable, which has a cross-sectional shape of a circle, but when looked at from the side, forms the shape of a parabola.

The Golden Gate is different than the common suspension bridge designs of the New York bridges, in that its "sag ratio" (the ratio of the vertical plunge to the span) of the main cable is larger. So although the main span is shorter than the Verrazano Bridge, it's towers are taller. This makes the force in the cable less (better - can be lighter), but the towers are taller, requiring them to be stiffer to resist buckling of a taller column (worse - must be heavier).