>the (assumed 50 year) lifetime of a building
what happens afterwards? is the building supposed to be torn down?
what happens afterwards? is the building supposed to be torn down?
If there is a 10% chance of collapse every 2475 years, that is ~1.1/10million per day chance, or 0.11 micromorts. That assumes 100% death during a collapse, and that the person spends all day in one of these buildings.
0.11 micromorts/day is very low, which makes the design criteria reasonable. Of course, I suspect our ability to predict infrequent events with any degree of accuracy is unlikely.