Sinkrate wrote:"The bridge was erected on Saturday in just six hours." Says it all I think!
That's not quite an accurate statement.
More on the construction...
An Accelerated Bridge Construction (ABC) method was supposed to reduce risks to workers and pedestrians and minimize traffic disruption, the university said. The school has long been interested in this kind of bridge design; in 2010, it opened an Accelerated Bridge Construction Center to "provide the transportation industry with the tools needed to effectively and economically utilize the principles of ABC to enhance mobility and safety, and produce safe, environmentally friendly, long-lasting bridges."
On March 10 the span was lifted from its temporary supports, rotated 90 degrees and lowered into what was supposed to be its permanent position.
When finished, the bridge would have been supported from above, with a tall, off-center tower and cables attached to the walkway. That tower had not yet been installed, and it was unclear what builders were using as temporary supports.
Authorities said Friday that the cables suspending a pedestrian bridge were being tightened after a "stress test" when the 950-ton concrete span collapsed over traffic, killing at least six people only days after its installation was celebrated as a technological innovation.
An Aircraft Mechanic only needs two tools, Duct Tape and WD40.
If it moves and it's not supposed to - use the Duct Tape.
If it doesn't move and it's supposed to - use the WD40.
Intel(R) i5 CPU 750 @ 2.67GHz, P55M-UD4, GeForce GTX960 8.00 GB RAM, Windows 7 Ultimate (32 bit & 64 bit on separate HDs)