Fatih Sultan Mehmet Bridge

Fatih Sultan Mehmet Bridge is the second suspension bridge over the Bosphorus in Istanbul. Constructed after the Bosphorus Bridge, this bridge connects the Hisarüstü neighborhood on the European side with the Kavacık neighborhood on the Asian side. Its foundation was laid in 1985 and construction was carried out by an international consortium comprising companies from Japan and Türkiye. The bridge was inaugurated on 3 July 1988 by then President Kenan Universe.

Technical Specifications:

Bridge Type:

The Fatih Sultan Mehmet Bridge is a steel suspension bridge. In the suspension system, the deck (road platform) is suspended from two main anchor cables via vertical suspension cables, and these main cables are supported by the towers. The ends of the cables are anchored to anchor blocks.

Location and Length:

The bridge is located at the second narrowest point of the Bosphorus, between Rumelihisarı and Anadolu Hisarı.

• Total length: 1,510 metres
• Main span (distance between towers): 1,090 metres
• Total crossing length including approach viaducts on land: approximately 1,510 metres
• Clearance above water: 64 metres (this height was chosen to avoid interfering with maritime traffic in the Bosphorus)
• Tower height: 105 metres (above sea level)

Width and Number of Lanes:

The bridge is 39 metres wide.

• Total number of lanes: 8 vehicle lanes (4 in each direction) plus 1 maintenance lane
• Lane configuration: The central lanes are designed to be reversible as needed (traffic direction can be adjusted during peak hours).

Support System and Materials:

• Main anchor cables: Steel cables approximately 60 cm in diameter, composed of thousands of individual wires.
• Suspender cables: Steel cables that run vertically from the main cables to the deck, carrying the load.
• Deck: Constructed from a steel box girder system, designed aerodynamically to withstand wind forces.
• Materials: Steel (support system and deck), concrete (foundations, anchor blocks, approach viaducts)

Wind and Seismic Resistance:

The bridge is designed to withstand winds of up to 200 km/h.

Additionally, due to its location within Istanbul’s active earthquake zone, it possesses high seismic resistance characteristics. Wind and oscillation calculations for the bridge were performed accordingly.

Maintenance and Insulation:

The deck and cables are protected against corrosion with special coatings. Regular monitoring of the bridge’s structural integrity is conducted using systems such as:

• Wind sensors
• Strain gauges
• Temperature sensors

Electrical and Lighting Systems:

The bridge’s lighting system remains active throughout the night to ensure driving safety and aesthetic appeal. Maintenance access paths, electricity lines, and surveillance systems have been specially designed.

Load Capacity:

• Average daily vehicle crossings: 150,000–200,000
• Maximum load capacity: Approximately 65,000 tonnes (equivalent vehicle load)

Traffic and Transportation:

The bridge plays a vital role in easing heavy city and intercity traffic in Istanbul. Located on Highway 2 (O-2), the bridge provides uninterrupted connectivity between Europe and Asia. It holds particular importance in directing heavy truck traffic as part of the TEM Motorway. The Fatih Sultan Mehmet Bridge is open exclusively to motorized vehicles; it is closed to pedestrian and bicycle traffic.

Fatih Sultan Mehmet Bridge

Name and Significance:

The bridge is named after Fatih Sultan Mehmet, the Ottoman sultan who conquered Istanbul in 1453. This name reflects the historical importance of Istanbul’s conquest. The Fatih Sultan Mehmet Bridge is not merely a transportation structure; it is also regarded as a symbol of Türkiye’s advancement in engineering and international cooperation.

Current Status:

The Fatih Sultan Mehmet Bridge is continuously renewed through maintenance and repair works. In 2015, comprehensive maintenance restored the bridge’s support system and road surfaces. As one of the three bridges connecting the two shores of Istanbul, the FSM Bridge accommodates hundreds of thousands of vehicles daily. It continues to fulfill, both physically and symbolically, the role of a bridge between Asia and Europe.