Not only man's social structure but the structure of the universe itself, it seemed, had failed.

This would give aircraft owners an indication of metal fatigue before any key structure actually failed.

As an engineer, he understood the necessity for finding out why a structure had failed.

Now the entire structure of opression is failing, and falling.

These problems are especially dangerous because they are difficult to detect before a part or structure fails.

And when their structure failed, the last black hole must have evaporated.

Work on why structures fail or break down is very important to engineering.

In fact, the historical experience shows that very large structures have been failing at a frequency several orders of magnitude higher than smaller ones.

Eventually, a flight occurred in which the cracks extended and the structure failed.

The complex structure that was the Ringworld would not fail for lack of tending.