How did the Bessemer process of steel production and the Otis elevator give rise to the modern structural steel erection industry?

Answer:
Safe elevators made it practical to build taller structures, and cheap steel provided architects with a way to support taller buildings without relying on thick, windowless walls of masonry.
First answer by Ency. of US Industries. Last edit by Ency. of US Industries. Contributor trust: 18 [recommend contributor recommended]. Question popularity: 1 [recommend question].