Back in the day, they assumed that [x] number of workers would die and worked that number into the calculations. The St. Louis Arch, for example, assumed 13 pe

Back in the day, they assumed that [x] number of workers would die and worked that number into the calculations. The St. Louis Arch, for example, assumed 13 people would die. Thankfully, we don't put such a small price on human life any more.