How Turkey Built an Impossible $2.7B Bridge Over the Sea

How do you build the world's longest bridge over the strait that sank empires? 2,023 m of suspended steel, [music] longer than any suspension bridge ever built before. This is how they pulled off the greatest suspension bridge engineering feat in history. Every single day, 45,000 trucks waited hours just to cross this 1,900 m strait.

Without a crossing, freight took six extra hours detoured through Istanbul every single time. Turkey built two Bosphorus bridges, both maxed out. The Dardanelles still had nothing. In 2017, Turkey signed the contract. Construction would begin within 12 months from here. Here's the crazy part. The first deck design failed catastrophically inside the wind tunnel.

Tacoma Narrows collapsed from wind resonance in 1940. That failure lived inside every calculation. The fix. A streamlined box girder aerodynamically kills flutter at 250 km/h. But there was one massive problem. An earthquake fault runs directly underneath. The solution, seismic isolation bearings that let the towers shift and absorb earthquake energy. 318 m towers, taller than the Eiffel

Tower, built composite steel inside concrete walls. Each main cable holds 22,736 wires, enough to circle the earth once over. That cable behind me holds 22,000 wires >> [music] >> carrying 50,000 tons of permanent load. Design finalized. 4,608 m total length. $2.5 [music] billion. 4.5 years to build. Watch closely. A 5,000 worker construction city built

from bare farmland in 90 days. The biggest cranes in Turkey came by sea. No road could carry them here. 14,000 tons of high tensile steel delivered in month one just for foundation rebar. 50,000 ships per year cross here. Everyone detoured around the construction zone. Four knot current runs here constantly. Divers fought it round the clock for