skyscrapers
(1) Steel and (2) the Elevator. Those are the most significant.
One technology that made skyscrapers possible would be the elevator. The other, I suspect is structural steel.
Elevator!
Thwe understanding of a load bearing structural frame where a steel frame supports the entire weight of the walls
The electric elevator, water pressure, and steel.
(1) Steel and (2) the Elevator. Those are the most significant.
steel
One technology that made skyscrapers possible would be the elevator. The other, I suspect is structural steel.
Elevator!
The making of steel allowed for higher buildings and then the elevator made it possible for more floors to be added.
A barn made with steel pole supports.
Thwe understanding of a load bearing structural frame where a steel frame supports the entire weight of the walls
In the car analogy for cells, the cytoskeleton would be the steel framework. The cytoskeleton supports the cell like the steel framework supports the car.
The elevator. Without the elevator to allow people to easily move upwards, advances in structure elements like steel and concrete would have been useless. Indeed, it was possible to build very tall structures from wood or bricks. Otis and his elevator made tall building practical.
Elevator and steel
it is actually economization of material. normally, for fixed ended beams positive (sagging) moments are present at the mid span and negative (hogging) moments at the supports. so bottom steel is required at the mid span and top steel resists negative moments at the supports. a bent-up is provided to take the steel on the top at supports as bottom steel is not normally required at at the supports (only nominal steel is sufficient). hope it'd help!
The electric elevator, water pressure, and steel.