inżynieria: Richmond–San Rafael Bridge

85 km) including approaches, the structure ranked as the world's second-longest bridge when completed, trailing only the San Francisco–Oakland Bay Bridge.

The Richmond–San Rafael Bridge (officially renamed the John F. McCarthy Memorial Bridge in 1981) is the northernmost east–west crossing of California's San Francisco Bay. Carrying Interstate 580, it connects Richmond on the east shore to San Rafael on the west. The bridge opened on September 1, 1956, replacing service previously provided by the Richmond–San Rafael Ferry Company. It was the last bridge built across the bay that replaced a ferry service, and the state legislature later renamed it to honor Senator John F. McCarthy, who championed its funding. Measuring 29,040 ft (5.500 mi; 8.85 km) including approaches, the structure ranked as the world's second-longest bridge when completed, trailing only the San Francisco–Oakland Bay Bridge. The double-decked span rests on 79 reinforced concrete piers anchored by steel H-piles and crosses two distinct navigation channels using twin cantilever structures. The roadway rises to clear each cantilever span and dips between them — Raab built the two cantilevers identically as a cost-saving measure, forcing the same grade profile on both sides and producing the distinctive "roller coaster" vertical undulation. Structural engineers later criticized this sagging center profile for violating the aesthetic principle that a bridge should soar. The non-parallel alignment of the two navigation channels also forces the bridge into a gentle S-…

Kategoria: inżynieria

Rodzina: inżynieria

Jakość źródła: 65/100

Próby weryfikacji: 0

Notatka fact-checku: Verification queue initialized; Fact-check 2.50+ owns subsequent state transitions.