What a new bridge over Baltimore's Patapsco River will look like is still very much a matter of speculation. But one design stands out.
When the 1,200-foot-long Francis Scott Key Bridge opened in 1977, its enormous steel-truss design was the state of the art for river crossings. But in the decades since, a more modern design that has gained favor could replace the span that was destroyed in March when a cargo ship struck it.this month into the circumstances of the Key Bridge's collapse into the Patapsco River, which killed six construction workers.
Protecting a new bridge from another calamitous ship strike could be accomplished in a few ways, he says. One method is to create artificial islands that surround bridge pylons. Any hit would be absorbed by the island, not the bridge. Another option: Install a robust system of defensive structures known as dolphins — circular concrete pillars located near a bridge's central supports that are designed to absorb the impact of a careening ship.
"If the client wants a signature bridge with a diamond-shaped pylon," for example,"that takes time." In Baltimore's case, where restoring a critical city artery is paramount, designers and the builder may be asked to"keep it simple. Keep it straightforward," he says.can take three to four years before a new bridge project can move forward, Yal says."That is the most critical piece of it," he says.
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