Bluebulb Projects' The Measure of Things presents:
1,100 is about half the number of Steps in the Sears Tower.
In other words, it's 0.52160 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 1.9170 times that amount.
(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)