29 Feb 2012 – Original Lake Washington floating bridge: Opened on July 3, 1940, this was the ... endorsed a concrete floating bridge despite intense skepticism. .... this 2,771-foot long structure floats on seven pontoons with a tubular truss ...
The water pressure in the tube balances the air pressure, with excess air escaping up ... Construction of the Brooklyn Bridge, which was built with the help of ... Hollow concrete structures float (see WWII concrete ships), so a box caisson must ...
26 Mar 2012 – Later this summer, the first batch of 77 huge floating concrete bridge pontoons will be towed into the lake and assembled north of the existing ...
In 1920, Homer Hadley, a young engineer working in the architectural office of the Seattle School District, suggested a floating bridge supported by concrete...
The main activity from the beginning was design of bridges, but also industrial ... Roads Administration to prepare guidelines for Submerged Floating Tube bridges. ... span in the world, and is still the longest for a span entirely in concrete.
File Format: PDF/Adobe Acrobat - Quick View Both bridges float on lightweight aggregate concrete pontoons. ... Bergsøysundet Bridge has a steel truss superstructure, consisting of members of tubular steel.