25th April Bridge

Sergio Herrera Palacios

Why do people confuse 25th April and Golden Gate?

25th April (1966) Golden Gate (1937)

Differences:1. Trusses2. Construction company

Similarities:1. Suspension bridges2. 2 towers3. Length, longest span, clearance below4. Painted in red5. Structural design: eartquakes, winds

Really, based on…

25th April San Francisco-Oakland Bay

25th April Bridge

• 1. Brief History • 2. Construction• 3. Characterisctics• 4. Other data

1. Brief history

• Initial designation (1966): Salazar Bridge• Current name(1974): 25th April Bridge after the

Revolution

2. Construction- Workers: 3.000- Months: 45- Inauguration in 1966, 5 months earlier- Cost: $ 32 million Tolls for 25 years

3. Characteristics• Total lenght: 2.3 km, > 1 km are suspended

• Double deck: - The upper platform: 4 lanes 6 lanes - The lower platform: 2 railway tracks * Part of the initial design but was eliminated and

structure lightened * Necessary: extensive structural reinforcements

(2nd set of main cables and > height towers)

4. Other data• Clearance below: 70 m• Height of main tower: 190 m• Depth (below deep water) of the foundation of south pilar:

79.3 m