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Vertical transom and stern of a modern cargo ship. In some boats and ships, a transom is the aft transverse surface of the hull that forms the stern of a vessel. Historically, they are a development from the canoe stern (or "double-ender") wherein which both bow and stern are pointed. Transoms add both strength and width to the stern.
Pontoon bridges have been constructed over the Zhang and Gong rivers since the Song dynasty (960–1279). One of the bridges, the Dongjin Bridge , can still be seen. It is 400 metres long, made up of wooden planks placed on around 100 wooden boats linked together with iron chains.
The floor of the bridge consists of a number of 19-foot-wide (5.8 m) transoms that run across the bridge, with 10-foot-long (3.0 m) stringers running between them, and over the top of the transoms, forming a square. [3] Transoms rest on the lower chord of the panels, and clamps hold them together.
The 1968 through-arch bridge was designed by Moffatt & Nichol [6] Engineers and was constructed by Bethlehem Steel [7] as a replacement for the World War II-era pontoon bridge. [8] Gerald Desmond served as City Attorney for Long Beach and played a significant role in obtaining tideland oil funds which helped finance the bridge that would later ...
A pontoon bridge (or ponton bridge), also known as a floating bridge, uses floats or shallow-draft boats to support a continuous deck for pedestrian and vehicle travel. The buoyancy of the supports limits the maximum load that they can carry. Most pontoon bridges are temporary and used in wartime and civil emergencies.
Of the pontoons, 21 are longitudinal pontoons that support the deck and structure and are 360 by 75 by 28 feet (109.7 m × 22.9 m × 8.5 m) and weigh 11,000 short tons (10,000 t); [65] 54 smaller supplemental pontoons, weighing 2,500 short tons (2,300 t), are used to stabilize the weight of the bridge; and two "cross" pontoons, weighing 10,100 ...
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