STEEL!
Elevators
Telephones
Efficient pumps
One technology that made skyscrapers possible would be the elevator. The other, I suspect is structural steel.
elevators and skyscrapers
the elevator!
Steel made it possible to build Skyscrapers. Answer "construction of skyscrapers"
elevators.
One technology that made skyscrapers possible would be the elevator. The other, I suspect is structural steel.
The invention of steel skeletons and elevators made building skyscrapers possible
elevators and skyscrapers
the elevator!
Steel made it possible to build Skyscrapers. Answer "construction of skyscrapers"
elevators.
Steel.
Skyscrapers
strong steel made it possible to build skyscrapers and suspension bridges
Two things:- 1) Construction steel. 2) Lifts.
Among them were the ability to mass produce steel, the invention of safe and efficient elevators, and the development of improved techniques for measuring and analyzing structural loads and stresses.
Electricity powered homes and factories. How did electricity change Americans' lives?