Summary
LOGAN -- With a piece of a former 4500 South bridge support from eastside I-215, Dave Petty and Parry Osborn, aided with a computer, began applying pressure.
At 140,000 pounds, the bridge piece began to pop and crack.See the full content of this document
Extract
Engineering Grad Students Get Smashed
At 250,000 pounds, the sounds turned to thuds, and small pieces of concrete began to fly.
At 380,000 pounds, long cracks -- technically cal...See the full content of this document
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