Classic statics problem. Remove support, sum.the moments.
https://en.m.wikipedia.org/wiki/Francis_Scott_Key_Bridge_(Baltimore)
The Francis Scott Key Bridge, known originally as the Outer Harbor Crossing until it was renamed in 1977 or simply as the Key Bridge or Beltway Bridge, was a steel arch-shaped continuous through truss bridge spanning the lower Patapsco River and outer Baltimore Harbor / Port carrying Maryland Route 695 in Baltimore, Maryland, United States. The main span of 1,200 feet (366 m) was the third longest span of any continuous truss in the world.[2] It was the longest bridge in the Baltimore metropolitan area
More like the dead of night
>Blackbird singing in the dead of night
https://youtube.com/watch?v=Man4Xw8Xypo
There might be a few birds singing tonight in LA and Miami.